<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->
<!-- Created: Mon Apr 06 23:03:51 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#PvpDisclosure" roleURI="http://xbrl.sec.gov/ecd/role/PvpDisclosure"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ErrCompDisclosure" roleURI="http://xbrl.sec.gov/ecd/role/ErrCompDisclosure"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#AwardTimingDisclosure" roleURI="http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure"/>
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#InsiderTradingArrangements" roleURI="http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements"/>
  <presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/PvpDisclosure" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <loc xlink:type="locator" xlink:label="MrBostonMember" xlink:href="dx-20251231.xsd#dx_MrBostonMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MrBostonMember" order="3.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <loc xlink:type="locator" xlink:label="MsPopenoeMember" xlink:href="dx-20251231.xsd#dx_MsPopenoeMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MsPopenoeMember" order="5.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
  </presentationLink>
  <presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/ErrCompDisclosure" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <loc xlink:type="locator" xlink:label="MrBostonMember" xlink:href="dx-20251231.xsd#dx_MrBostonMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MrBostonMember" order="0.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <loc xlink:type="locator" xlink:label="MsPopenoeMember" xlink:href="dx-20251231.xsd#dx_MsPopenoeMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MsPopenoeMember" order="0.01" preferredLabel="http://www.xbrl.org/2003/role/label"/>
  </presentationLink>
  <presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <loc xlink:type="locator" xlink:label="MrBostonMember" xlink:href="dx-20251231.xsd#dx_MrBostonMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MrBostonMember" order="0.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <loc xlink:type="locator" xlink:label="MsPopenoeMember" xlink:href="dx-20251231.xsd#dx_MsPopenoeMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MsPopenoeMember" order="0.01" preferredLabel="http://www.xbrl.org/2003/role/label"/>
  </presentationLink>
  <presentationLink xlink:role="http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="ecd_AllIndividualsMember" xlink:href="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd#ecd_AllIndividualsMember"/>
    <loc xlink:type="locator" xlink:label="MrBostonMember" xlink:href="dx-20251231.xsd#dx_MrBostonMember"/>
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MrBostonMember" order="0.0" preferredLabel="http://www.xbrl.org/2003/role/label"/>
    <loc xlink:type="locator" xlink:label="MsPopenoeMember" xlink:href="dx-20251231.xsd#dx_MsPopenoeMember"/>
<!-- [WMV6][cp64+ICvgGTjYxh9bUPNJ17P4LA4Vou5uy9DFcB+It6+zlCOvyMmsFR2lMMR0ItjDw2bD5IOjvY5HQCEtd1Ssj7gMVdac+X2g7Tv8545PQBi6bOxsdwQ/weVGU6TfXxIc5XQN+evxcQaILCoxXK3MMDfOF0bAKZtFHZrH2WZsTnXDWitxh0PUUMtoEWAmvKXxNxHgJgcoRryhGsEMX10UGuIOfa2vgsGL+sXC3XOlnIYJh2kE5+JXx29DyyMYjIEN33coJcFp/qqVqipSuAHMeIvKrvO4xcPklnLTtQ+wfFKMTt4AA2DQ3r06nwBY2gw] CSR-->
    <presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ecd_AllIndividualsMember" xlink:to="MsPopenoeMember" order="0.01" preferredLabel="http://www.xbrl.org/2003/role/label"/>
  </presentationLink>
</linkbase>
