TORONTO, ONTARIO--(Marketwired - Aug. 26, 2016) - (TSX:XSC)(TSX:XSE)(TSX:XSI) - BlackRock Asset Management Canada Limited ("BlackRock Canada"), an indirect, wholly-owned subsidiary of BlackRock, Inc. (NYSE:BLK), today announced changes to the investment strategy of the following funds (collectively, the "iShares Funds"), to clarify and enhance the manner in which a proprietary portfolio optimization process is used in the construction of the iShares Funds' portfolios: