Standard & Poor's will make the following changes in the S&P/TSX SmallCap and Global Mining indices.

Shareholders of Western Copper Corp. approved, on Oct. 3, 2011, the plan of arrangement, whereby the company will spin out certain copper interests to shareholders. For every two shares of Western Copper held, shareholders will receive one share of a new company named Copper North Mining Corp. and one share of a new company named NorthIsle Copper and Gold Inc. Copper North and NorthIsle Copper will trade on the TSX Venture Exchange for the first time (the ex date of the spinoff) on Oct. 20, 2011, under the ticker symbols COL and NCX, respectively. The spun-out shares of Copper North and NorthIsle Copper will be added at zero price to the S&P/TSX SmallCap and Equity SmallCap, the S&P/TSX Global Mining and Global Base Metals, and the S&P/TSX Equal Weight Global Base Metals indices, after the close of trading on Wednesday, Oct. 19, 2011.

Effective after the close of Thursday, Oct. 20, 2011, the shares of Copper North and NorthIsle Copper will be removed from the same five indices.

Also effective after the close of Wednesday, Oct. 19, 2011, Western Copper will trade under the new name Western Copper and Gold Corp. There will be no change to the ticker symbol WRN.

Company additions to and deletions from an S&P equity index do not in any way reflect an opinion on the investment merits of the company.