FLEXSHARES TRUST FLEXSHARES DISCIPLINED DURATION MBS INDEX FUND

The investment seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the ICE BofA Merrill Lynch® Constrained Duration US Mortgage Backed Securities IndexSM. The underlying index reflects the performance of a selection of investment-grade U.S. agency residential mortgage backed pass-through securities. The fund generally will invest under normal circumstances at least 80% of its total assets (exclusive of collateral held from securities lending) in the securities of the underlying index and in TBA Transactions that represent securities in the underlying index.