Standard & Poor's Announces Changes in the S&P/TSX Canadian Indices

TORONTO, April 30, 2012 /CNW/ - Standard & Poor's will make the following changes in the S&P/TSX Canadian Indices:

• The shares of Merc International Minerals Inc. (TSXVN:MRK) will trade under the new name Nighthawk Gold Corp. in the S&P/TSX Venture Composite Index after the close of Monday, April 30, 2012. The new ticker symbol will be "NHK" and the new CUSIP number will be 65412D 10 6. There is no consolidation of capital.

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.

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Tony North
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Dave Guarino
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