Strategy. The NY Municipal Bond Portfolio seeks its investment objective by investing primarily in a universe of municipal securities issued by or on behalf of New York state or local governments and their agencies, instrumentalities and regional governmental authorities. The Portfolio may also invest a portion of its assets in municipal securities issued by U.S. territories that are exempt from state taxation under federal law. Municipal securities in which the Portfolio may invest include, among others, revenue bonds, general obligation bonds, industrial development bonds, municipal lease obligations, commercial paper, variable rate demand obligations and other instruments (including participation interests in such securities). The Portfolio intends to invest in municipal securities that, in the opinion of bond counsel for the issuers and … Show more… The NY Municipal Bond Portfolio seeks its investment objective by investing primarily in a universe of municipal securities issued by or on behalf of New York state or local governments and their agencies, instrumentalities and regional governmental authorities. The Portfolio may also invest a portion of its assets in municipal securities issued by U.S. territories that are exempt from state taxation under federal law. Municipal securities in which the Portfolio may invest include, among others, revenue bonds, general obligation bonds, industrial development bonds, municipal lease obligations, commercial paper, variable rate demand obligations and other instruments (including participation interests in such securities). The Portfolio intends to invest in municipal securities that, in the opinion of bond counsel for the issuers and under current tax law, provide interest that is exempt from New York state and federal personal income taxes. As a fundamental investment policy, under normal market conditions, the Portfolio will invest at least 80% of its net assets in municipal securities that pay interest exempt from New York state and federal personal income taxes. The Portfolio does not currently intend to invest its assets in municipal securities whose interest is subject to the federal alternative minimum tax. Generally, the NY Municipal Bond Portfolio will maintain a maximum weighted average duration of five years. The Portfolio intends to maintain a dollar-weighted average credit quality equal to or better than the lower of: (i) a credit quality rating of AA by S&P Global Ratings (S&P) or Fitch Ratings Ltd. (Fitch) or Aa2 by Moodys Ratings (Moodys) or (ii) the credit quality of general obligation bonds issued by the state of New York. For purposes of the above policy on dollar-weighted average credit quality, unrated securities may be included if such securities have been determined by Dimensional Fund Advisors LP (the Advisor) to be of comparable quality. If a security has been or is expected to be redeemed by the issuer at a date prior to the stated final maturity date for the purposes of the above duration restriction, the early redemption date shall be considered the maturity date regardless of the stated final maturity. If a security's coupon or interest rate is periodically reset, the reset date will be considered for the purposes of the above duration restriction. Duration is a measure of the sensitivity of a securitys price to changes in interest rates. The longer a securitys duration, the more sensitive it will be to changes in interest rates. Municipal securities are often issued to obtain funds for various public purposes, including the construction of a wide range of public facilities, such as bridges, highways, housing, hospitals, mass transportation facilities, schools, streets and public utilities, such as water and sewer works. Municipal securities include municipal leases, certificates of participation, municipal obligation components and municipal custody receipts. The NY Municipal Bond Portfolio may invest more than 25% of its assets in municipal securities issued to finance projects in a particular segment of the bond market including, but not limited to, health care, housing, education, utilities, and transportation. The Portfolio also may invest more than 25% of its assets in industrial development bonds. The NY Municipal Bond Portfolio may (1) purchase certain municipal securities that are insured, (2) invest in municipal securities secured by mortgages on single-family homes and multi-family projects, (3) invest in pre-refunded municipal securities, (4) purchase tax-exempt municipal securities on a when-issued basis and (5) use derivatives, such as fixed income related futures and options contracts, credit default swaps and interest rate swaps, to hedge against changes in interest rates. The Portfolio may also invest in exchange-traded funds (ETFs) to gain exposure to the municipal bond market pending investment in municipal bonds. The Portfolio may also invest in money market funds. The Portfolio also may purchase or sell futures contracts and options on futures contracts, to hedge its interest rate exposure or for non-hedging purposes, such as a substitute for direct investment or to increase or decrease market exposure based on actual or expected cash inflows to or outflows from the Portfolio. Although the NY Municipal Bond Portfolio attempts to invest all of its assets in tax-exempt securities, it is possible, although not anticipated, that a portion of its assets may be invested in securities that pay taxable interest, including interest that may be subject to the federal alternative minimum tax. These investments could generate taxable income for shareholders. The NY Municipal Bond Portfolio is primarily designed for investment by New York tax payers. The NY Municipal Bond Portfolio is non-diversified, which means that the Portfolio may invest its assets in a smaller number of issuers than a diversified fund. Show less