The Frontier Economic Fund Class S000093209 The Frontier Economic Fund C000261363 The Frontier Economic Fund MLP Risk Member MLP Risk Member Market Capitalization Risk Member Market Capitalization Risk Member Passive Investment Risk Member Passive Investment Risk Member Market Capitalization Risk, Small-Capitalization Investing Risk Member Market Capitalization Risk, Small-Capitalization Investing Risk Member ETF Risks, Trading Risk Member ETF Risks, Trading Risk Member U.S. Diversified Real Estate ETF U.S. Diversified Real Estate ETF Series, S000061208 ETF Risks Member ETF Risks Member Models And Data Risk Member Models And Data Risk Member The Frontier Economic Fund S000093209 The Frontier Economic Fund C000261363 The Frontier Economic Fund Foreign Securities Risk Member Foreign Securities Risk Member U.S. Diversified Real Estate ETF Class U.S. Diversified Real Estate ETF -- C000198249 -- PPTY Real Estate Investment Risk Member Real Estate Investment Risk Member ADR Risk Member ADR Risk Member USREX – U.S. Diversified Real Estate Index™ (reflects no deduction for fees, expenses, or taxes) USREX – U.S. Diversified Real Estate Index™ (reflects no deduction for fees, expenses, or taxes) ETF Risks, Costs Of Buying Or Selling Shares Risk Member ETF Risks, Costs Of Buying Or Selling Shares Risk Member MSCI US REIT Gross Index (reflects no deduction for fees, expenses, or taxes) MSCI US REIT Gross Index (reflects no deduction for fees, expenses, or taxes) Smaller Companies Risk Member Smaller Companies Risk Member Market Capitalization Risk, Large-Capitalization Investing Risk Member Market Capitalization Risk, Large-Capitalization Investing Risk Member Tracking Error Risk Member Tracking Error Risk Member Concentration Risk Member Concentration Risk Member Sector Risk Member Sector Risk Member Sector Risk, Consumer Discretionary Sector Risk Member Sector Risk, Consumer Discretionary Sector Risk Member Market Capitalization Risk, Mid-Capitalization Investing Risk Member Market Capitalization Risk, Mid-Capitalization Investing Risk Member ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member Geographic Investment Risk Member Geographic Investment Risk Member New Fund Risk Member New Fund Risk Member S&P 500 Index®
(reflects no deduction for fees, expenses, or taxes) S&P 500 Index®
(reflects no deduction for fees, expenses, or taxes) Sector Risk, Energy Sector Risk Member Sector Risk, Energy Sector Risk Member Sector Risk, Industrials Sector Risk Member Sector Risk, Industrials Sector Risk Member Equity Market Risk Member Equity Market Risk Member