<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by DFIN XBRL Schema Document - http://www.dfinsolutions.com/ - on 19-02-2026 10:42:40 PM -->
<!-- Copyright(c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<schema targetNamespace="http://www.virtus.com/20260211" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vast="http://www.virtus.com/20260211" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:srt-types="http://fasb.org/srt-types/2025" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:oef="http://xbrl.sec.gov/oef/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:oef-pre="http://xbrl.sec.gov/oef-pre/2025" xmlns:oef-lab="http://xbrl.sec.gov/oef-lab/2025" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:oef-def="http://xbrl.sec.gov/oef-def/2025" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:srt="http://fasb.org/srt/2025" xmlns:oef-sr="http://xbrl.sec.gov/oef-sr/2025" xmlns:srt-roles="http://fasb.org/srt-roles/2025" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:stpr="http://xbrl.sec.gov/stpr/2025" elementFormDefault="qualified">
   <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
   <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
   <import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/>
   <import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd"/>
   <import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>   
   <import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/>
   <import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/>
   <import namespace="http://fasb.org/srt-types/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd"/>
   <import namespace="http://xbrl.sec.gov/oef-sr/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-sr-2025.xsd"/>
   <import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/>
   <import namespace="http://fasb.org/us-roles/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd"/>
   <import namespace="http://fasb.org/srt-roles/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd"/>
   <annotation>
      <appinfo>
         <link:linkbase id="lnk">
            <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReport" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReport"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportHoldingsDetails"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportLineGraphDetails"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportAverageAnnualReturnDetails"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
            <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/LargestHoldingOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#LargestHoldingOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/Other1CategoryOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other1CategoryOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#AdditionalIndexOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#BroadBasedIndexOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/Other2CategoryOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#Other2CategoryOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SalesLoadOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SalesLoadOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/MaturityOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#MaturityOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/IndustrySectorOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#IndustrySectorOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/CreditQualityOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#CreditQualityOnly"/>
            <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/GeographicRegionOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#GeographicRegionOnly"/>
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			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
			<link:loc xlink:type="locator" xlink:href="#vast_C000241133Member" xlink:label="C000241133Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241133Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241132Member" xlink:label="C000241132Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241132Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241131Member" xlink:label="C000241131Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241131Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241134Member" xlink:label="C000241134Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241134Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241136Member" xlink:label="C000241136Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241136Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241137Member" xlink:label="C000241137Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241137Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241138Member" xlink:label="C000241138Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241138Member" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241135Member" xlink:label="C000241135Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241135Member" order="9.0" />

			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails">               
			 <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
			 <link:loc xlink:type="locator" xlink:href="#vast_C000241133Member" xlink:label="C000241133Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241133Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241132Member" xlink:label="C000241132Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241132Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241131Member" xlink:label="C000241131Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241131Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241134Member" xlink:label="C000241134Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241134Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241136Member" xlink:label="C000241136Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241136Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241137Member" xlink:label="C000241137Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241137Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241138Member" xlink:label="C000241138Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241138Member" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241135Member" xlink:label="C000241135Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241135Member" order="9.0" />
   
			 <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="InvestmentTypeCategorizationMember"/>
			 <link:loc xlink:type="locator" xlink:href="#vast_AllOtherCommonStocksMember" xlink:label="AllOtherCommonStocksMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="AllOtherCommonStocksMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_CapitalMarketsMember" xlink:label="CapitalMarketsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CapitalMarketsMember" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_OilGasAndConsumableFuelsMember" xlink:label="OilGasAndConsumableFuelsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="OilGasAndConsumableFuelsMember" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_SoftwareMember" xlink:label="SoftwareMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="SoftwareMember" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="CommonStockMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CommonStockMember" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="ShortTermInvestmentsMember" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentDebtSecuritiesMember" xlink:label="USGovernmentDebtSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="USGovernmentDebtSecuritiesMember" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CommercialPaperMember" order="9.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="CertificatesOfDepositMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CertificatesOfDepositMember" order="10.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMember" xlink:label="EquityMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="EquityMember" order="11.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityMember" xlink:label="CommodityMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CommodityMember" order="12.0" />
					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="FixedIncomeSecuritiesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="FixedIncomeSecuritiesMember" order="13.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_CurrenciesMember" xlink:label="CurrenciesMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="InvestmentTypeCategorizationMember" xlink:to="CurrenciesMember" order="14.0" />

			 <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaturityDomain" xlink:label="MaturityDomain"/>
			
			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory1Domain" xlink:label="OtherCategory1Domain"/>
			
			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_OtherCategory2Domain" xlink:label="OtherCategory2Domain"/>
			
			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_LargestHoldingsDomain" xlink:label="LargestHoldingsDomain"/>
			
            <!--GeographicRegionDomain Only presentation and label linkbases-->			 
			 <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_GeographicRegionDomain" xlink:label="GeographicRegionDomain"/>
			 
			<!--IndustrySectorDomain Only presentation and label linkbases-->	
			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/>	
			
			<!--CreditQualityDomain Only presentation and label linkbases-->	
			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CreditQualityDomain" xlink:label="CreditQualityDomain"/>	
			
			<!--ExternalCreditRatingFitchMember Only presentation and label linkbases-->	
			<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingFitchMember" xlink:label="ExternalCreditRatingFitchMember"/>
			<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingFitchMember" xbrldt:usable="false" order="1.0"/>
			
			<!--ExternalCreditRatingMoodysMember Only presentation and label linkbases-->	
			<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingMoodysMember" xlink:label="ExternalCreditRatingMoodysMember"/>
			<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingMoodysMember" xbrldt:usable="false" order="2.1"/>
			
			<!--ExternalCreditRatingStandardPoorsMember Only presentation and label linkbases-->	
			<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ExternalCreditRatingStandardPoorsMember" xlink:label="ExternalCreditRatingStandardPoorsMember"/>
			<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="ExternalCreditRatingStandardPoorsMember" xbrldt:usable="false" order="3.1"/>
			
			<!--CreditRatingAMBestDomain Only presentation and label linkbases-->	
			<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CreditRatingAMBestDomain" xlink:label="CreditRatingAMBestDomain"/>
			<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="CreditQualityDomain" xlink:to="CreditRatingAMBestDomain" xbrldt:usable="false" order="4.1"/>
            			
			</link:presentationLink>
            <link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails">            
			  <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
			  <link:loc xlink:type="locator" xlink:href="#vast_C000241133Member" xlink:label="C000241133Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241133Member" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241132Member" xlink:label="C000241132Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241132Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241131Member" xlink:label="C000241131Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241131Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241134Member" xlink:label="C000241134Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241134Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241136Member" xlink:label="C000241136Member"/>
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					<link:loc xlink:type="locator" xlink:href="#vast_C000241137Member" xlink:label="C000241137Member"/>
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					<link:loc xlink:type="locator" xlink:href="#vast_C000241138Member" xlink:label="C000241138Member"/>
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					<link:loc xlink:type="locator" xlink:href="#vast_C000241132Member" xlink:label="C000241132Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241132Member" order="3.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241131Member" xlink:label="C000241131Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241131Member" order="4.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241134Member" xlink:label="C000241134Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241134Member" order="5.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241136Member" xlink:label="C000241136Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241136Member" order="6.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241137Member" xlink:label="C000241137Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241137Member" order="7.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241138Member" xlink:label="C000241138Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241138Member" order="8.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_C000241135Member" xlink:label="C000241135Member"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000241135Member" order="9.0" />

			  <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/>
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					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="BarclayFundOfFundsC000241131IndexMember" order="2.0" />
					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241133IndexMember" xlink:label="BarclayFundOfFundsC000241133IndexMember"/>
					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="BarclayFundOfFundsC000241133IndexMember" order="3.0" />
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					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="CreditSuisseManagedFuturesLiquidIndexMember" order="8.0" />
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					<link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="SGTrendIndexMember" order="9.0" />
 
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			  <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_WithSalesLoadMember" xlink:label="WithSalesLoadMember"/>
			                 		  
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			</link:definitionLink>
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					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="FTWilshire5000C000241132IndexMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_FTWilshire5000IndexMember" xlink:label="FTWilshire5000IndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="FTWilshire5000IndexMember" order="3.0"/>

            </link:definitionLink>
            <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly">              
			   <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/>
			   <link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241131IndexMember" xlink:label="BarclayFundOfFundsC000241131IndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BarclayFundOfFundsC000241131IndexMember" order="1.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241133IndexMember" xlink:label="BarclayFundOfFundsC000241133IndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BarclayFundOfFundsC000241133IndexMember" order="2.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241132IndexMember" xlink:label="BarclayFundOfFundsC000241132IndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BarclayFundOfFundsC000241132IndexMember" order="3.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsIndexMember" xlink:label="BarclayFundOfFundsIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="BarclayFundOfFundsIndexMember" order="4.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_CreditSuisseManagedFuturesLiquidC000241138IndexMember" xlink:label="CreditSuisseManagedFuturesLiquidC000241138IndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="CreditSuisseManagedFuturesLiquidC000241138IndexMember" order="5.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_SGTrendC000241138IndexMember" xlink:label="SGTrendC000241138IndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="SGTrendC000241138IndexMember" order="6.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_CreditSuisseManagedFuturesLiquidIndexMember" xlink:label="CreditSuisseManagedFuturesLiquidIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="CreditSuisseManagedFuturesLiquidIndexMember" order="7.0"/>
					<link:loc xlink:type="locator" xlink:href="#vast_SGTrendIndexMember" xlink:label="SGTrendIndexMember"/>
					<link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="SGTrendIndexMember" order="8.0"/>

            </link:definitionLink>
			<link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/MaturityOnly">
			<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_MaturityDomain" xlink:label="MaturityDomain"/>
			
			</link:definitionLink>
            <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/IndustrySectorOnly">
                <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/>
                
            </link:definitionLink>
            <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/CreditQualityOnly">
                <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_CreditQualityDomain" xlink:label="CreditQualityDomain"/>
                
            </link:definitionLink>
            <!--GeographicRegionOnly use only for STPR-->
            <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/GeographicRegionOnly">
            <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_GeographicRegionDomain" xlink:label="GeographicRegionDomain"/>
            
            </link:definitionLink>
            <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">               
               <link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241131IndexMember" xlink:label="BarclayFundOfFundsC000241131IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BarclayFundOfFundsC000241131IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Barclay Fund of Funds C000241131 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BarclayFundOfFundsC000241131IndexMember" xlink:to="label_BarclayFundOfFundsC000241131IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241133IndexMember" xlink:label="BarclayFundOfFundsC000241133IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BarclayFundOfFundsC000241133IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Barclay Fund of Funds C000241133 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BarclayFundOfFundsC000241133IndexMember" xlink:to="label_BarclayFundOfFundsC000241133IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_FTWilshire5000C000241133IndexMember" xlink:label="FTWilshire5000C000241133IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_FTWilshire5000C000241133IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">FT Wilshire 5000 C000241133 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FTWilshire5000C000241133IndexMember" xlink:to="label_FTWilshire5000C000241133IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsC000241132IndexMember" xlink:label="BarclayFundOfFundsC000241132IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BarclayFundOfFundsC000241132IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Barclay Fund of Funds C000241132 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BarclayFundOfFundsC000241132IndexMember" xlink:to="label_BarclayFundOfFundsC000241132IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_AllOtherCommonStocksMember" xlink:label="AllOtherCommonStocksMember"/>
					<link:label xlink:type="resource" xlink:label="label_AllOtherCommonStocksMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">All other Common Stocks [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AllOtherCommonStocksMember" xlink:to="label_AllOtherCommonStocksMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_CapitalMarketsMember" xlink:label="CapitalMarketsMember"/>
					<link:label xlink:type="resource" xlink:label="label_CapitalMarketsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Capital Markets [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CapitalMarketsMember" xlink:to="label_CapitalMarketsMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_OilGasAndConsumableFuelsMember" xlink:label="OilGasAndConsumableFuelsMember"/>
					<link:label xlink:type="resource" xlink:label="label_OilGasAndConsumableFuelsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Oil Gas And Consumable Fuels [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OilGasAndConsumableFuelsMember" xlink:to="label_OilGasAndConsumableFuelsMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_FTWilshire5000C000241132IndexMember" xlink:label="FTWilshire5000C000241132IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_FTWilshire5000C000241132IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">FT Wilshire 5000 C000241132 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FTWilshire5000C000241132IndexMember" xlink:to="label_FTWilshire5000C000241132IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_SoftwareMember" xlink:label="SoftwareMember"/>
					<link:label xlink:type="resource" xlink:label="label_SoftwareMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Software [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SoftwareMember" xlink:to="label_SoftwareMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_BarclayFundOfFundsIndexMember" xlink:label="BarclayFundOfFundsIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_BarclayFundOfFundsIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Barclay Fund of Funds Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BarclayFundOfFundsIndexMember" xlink:to="label_BarclayFundOfFundsIndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_FTWilshire5000IndexMember" xlink:label="FTWilshire5000IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_FTWilshire5000IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">FT Wilshire 5000 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FTWilshire5000IndexMember" xlink:to="label_FTWilshire5000IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241133Member" xlink:label="C000241133Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241133Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241133 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241133Member" xlink:to="label_C000241133Member"/>

										<link:label xlink:type="resource" xlink:label="label_C000241133Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Class R6</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241133Member" xlink:to="label_C000241133Member_2"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241132Member" xlink:label="C000241132Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241132Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241132 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241132Member" xlink:to="label_C000241132Member"/>

										<link:label xlink:type="resource" xlink:label="label_C000241132Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Class I</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241132Member" xlink:to="label_C000241132Member_2"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241131Member" xlink:label="C000241131Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241131Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241131 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241131Member" xlink:to="label_C000241131Member"/>

										<link:label xlink:type="resource" xlink:label="label_C000241131Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Class C</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241131Member" xlink:to="label_C000241131Member_2"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241134Member" xlink:label="C000241134Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241134Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241134 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241134Member" xlink:to="label_C000241134Member"/>

										<link:label xlink:type="resource" xlink:label="label_C000241134Member_2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Class A</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241134Member" xlink:to="label_C000241134Member_2"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="CommonStockMember"/>
					<link:label xlink:type="resource" xlink:label="label_CommonStockMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Common Stock [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommonStockMember" xlink:to="label_CommonStockMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="ShortTermInvestmentsMember"/>
					<link:label xlink:type="resource" xlink:label="label_ShortTermInvestmentsMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Short-Term Investments [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShortTermInvestmentsMember" xlink:to="label_ShortTermInvestmentsMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentDebtSecuritiesMember" xlink:label="USGovernmentDebtSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_USGovernmentDebtSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">US Government Debt Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="USGovernmentDebtSecuritiesMember" xlink:to="label_USGovernmentDebtSecuritiesMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember" xlink:label="CommercialPaperMember"/>
					<link:label xlink:type="resource" xlink:label="label_CommercialPaperMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Commercial Paper [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommercialPaperMember" xlink:to="label_CommercialPaperMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="CertificatesOfDepositMember"/>
					<link:label xlink:type="resource" xlink:label="label_CertificatesOfDepositMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Certificates of Deposit [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CertificatesOfDepositMember" xlink:to="label_CertificatesOfDepositMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMember" xlink:label="EquityMember"/>
					<link:label xlink:type="resource" xlink:label="label_EquityMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Equity [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="EquityMember" xlink:to="label_EquityMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityMember" xlink:label="CommodityMember"/>
					<link:label xlink:type="resource" xlink:label="label_CommodityMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Commodity [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CommodityMember" xlink:to="label_CommodityMember"/>

					<link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="FixedIncomeSecuritiesMember"/>
					<link:label xlink:type="resource" xlink:label="label_FixedIncomeSecuritiesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Fixed Income Securities [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="FixedIncomeSecuritiesMember" xlink:to="label_FixedIncomeSecuritiesMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241136Member" xlink:label="C000241136Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241136Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241136 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241136Member" xlink:to="label_C000241136Member"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241137Member" xlink:label="C000241137Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241137Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241137 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241137Member" xlink:to="label_C000241137Member"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241138Member" xlink:label="C000241138Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241138Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241138 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241138Member" xlink:to="label_C000241138Member"/>

					<link:loc xlink:type="locator" xlink:href="#vast_C000241135Member" xlink:label="C000241135Member"/>
					<link:label xlink:type="resource" xlink:label="label_C000241135Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000241135 [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000241135Member" xlink:to="label_C000241135Member"/>

					<link:loc xlink:type="locator" xlink:href="#vast_CurrenciesMember" xlink:label="CurrenciesMember"/>
					<link:label xlink:type="resource" xlink:label="label_CurrenciesMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Currencies [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CurrenciesMember" xlink:to="label_CurrenciesMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_CreditSuisseManagedFuturesLiquidC000241138IndexMember" xlink:label="CreditSuisseManagedFuturesLiquidC000241138IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_CreditSuisseManagedFuturesLiquidC000241138IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Credit Suisse Managed Futures Liquid C000241138 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CreditSuisseManagedFuturesLiquidC000241138IndexMember" xlink:to="label_CreditSuisseManagedFuturesLiquidC000241138IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_SGTrendC000241138IndexMember" xlink:label="SGTrendC000241138IndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_SGTrendC000241138IndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">SG Trend C000241138 Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGTrendC000241138IndexMember" xlink:to="label_SGTrendC000241138IndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_CreditSuisseManagedFuturesLiquidIndexMember" xlink:label="CreditSuisseManagedFuturesLiquidIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_CreditSuisseManagedFuturesLiquidIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Credit Suisse Managed Futures Liquid Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CreditSuisseManagedFuturesLiquidIndexMember" xlink:to="label_CreditSuisseManagedFuturesLiquidIndexMember"/>

					<link:loc xlink:type="locator" xlink:href="#vast_SGTrendIndexMember" xlink:label="SGTrendIndexMember"/>
					<link:label xlink:type="resource" xlink:label="label_SGTrendIndexMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">SG Trend Index [Member]</link:label>
					<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="SGTrendIndexMember" xlink:to="label_SGTrendIndexMember"/>

					
                <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="InvestmentTypeAxis"/>
                <link:label xlink:type="resource" xlink:label="label_InvestmentTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investment Type [Axis]</link:label>
                <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentTypeAxis" xlink:to="label_InvestmentTypeAxis" priority="1"/>
                <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="AssetsNet"/>
                <link:label xlink:type="resource" xlink:label="label_AssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Net Assets</link:label>
                <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetsNet" xlink:to="label_AssetsNet" priority="1"/>
                <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="InvestmentCompanyPortfolioTurnover"/>
                <link:label xlink:type="resource" xlink:label="label_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Investment Company Portfolio Turnover</link:label>
                <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentCompanyPortfolioTurnover" xlink:to="label_InvestmentCompanyPortfolioTurnover" priority="1"/>                
                <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag" xlink:label="dei_NoTradingSymbolFlag"/>
				<link:label xlink:type="resource" xlink:label="label_NoTradingSymbolFlag" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">No Trading Symbol Flag</link:label>
				<link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_NoTradingSymbolFlag" xlink:to="label_NoTradingSymbolFlag" priority="1"/>		
            </link:labelLink>
         </link:linkbase>
      </appinfo>
  </annotation>   
   <element name="BarclayFundOfFundsC000241131IndexMember" id="vast_BarclayFundOfFundsC000241131IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BarclayFundOfFundsC000241133IndexMember" id="vast_BarclayFundOfFundsC000241133IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="FTWilshire5000C000241133IndexMember" id="vast_FTWilshire5000C000241133IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BarclayFundOfFundsC000241132IndexMember" id="vast_BarclayFundOfFundsC000241132IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="AllOtherCommonStocksMember" id="vast_AllOtherCommonStocksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CapitalMarketsMember" id="vast_CapitalMarketsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="OilGasAndConsumableFuelsMember" id="vast_OilGasAndConsumableFuelsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="FTWilshire5000C000241132IndexMember" id="vast_FTWilshire5000C000241132IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="SoftwareMember" id="vast_SoftwareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="BarclayFundOfFundsIndexMember" id="vast_BarclayFundOfFundsIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="FTWilshire5000IndexMember" id="vast_FTWilshire5000IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241133Member" id="vast_C000241133Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241132Member" id="vast_C000241132Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241131Member" id="vast_C000241131Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241134Member" id="vast_C000241134Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
							<element name="C000241136Member" id="vast_C000241136Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241137Member" id="vast_C000241137Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241138Member" id="vast_C000241138Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="C000241135Member" id="vast_C000241135Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CurrenciesMember" id="vast_CurrenciesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CreditSuisseManagedFuturesLiquidC000241138IndexMember" id="vast_CreditSuisseManagedFuturesLiquidC000241138IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="SGTrendC000241138IndexMember" id="vast_SGTrendC000241138IndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="CreditSuisseManagedFuturesLiquidIndexMember" id="vast_CreditSuisseManagedFuturesLiquidIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
	<element name="SGTrendIndexMember" id="vast_SGTrendIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>

</schema>
