About the McEwen Junior Gold Index ("MJGI" or "Index")

WEIGHTING:
The Index is market-value weighted. Movements in the prices of stocks with higher market capitalizations (the share price times the number of shares outstanding) have a greater effect on the Index than companies with smaller market capitalization.

VERSION:
The Index is quoted as a price return index. A price return index does not account for dividends. Rather, its solely captures the changes in the share prices of the Index components.

SELECTION:
Although the component companies are selected by a committee, in their discretion, there are a number of baseline criteria used:

Minimum market capitalization of US$50 million
Minimum daily trading liquidity of US$50,000
Listed on any of the TSX, TSX-V, NYSE, NYSE.A, NASDAQ
No commercial production

INDEX MAINTENANCE:
Companies are continually reviewed for possible inclusion and exclusion from the index. Changes are made to the index at the end of every month.

Mr. McEwen, his affiliates, and/or related parties hold, acquire; and dispose of common shares, purchase warrants, and options in certain MJGI companies as they see fit from time to time. Other than as required under applicable securities laws, the foregoing parties may not disclose such trades or holdings now or in the future. The MJGI is not intended as a recommendation to purchase or dispose of shares in its component companies. The following information is provided as of June 15, 2009 and is subject to change without notice.

Direct Interests

US GOLD:
Rob McEwen is Chairman and Chief Executive Officer of US Gold Corporation since 2005

25,427,527 Shares of US Gold Corporation (1)
333,500 Common Share Purchase Warrants of US Gold Corporation
1,000,000 Stock Options of US Gold Corporation

RUBICON MINERALS:

45,714,357 Common Shares of Rubicon Minerals Corporation

(1) Consisting of 16,317,300 Common Shares of US Gold Corporation, and 9,110,227 Shares of US Gold Canadian Acquisition Corporation which are convertible into common shares on a 1 for 1 basis.

Indirect Interests

RUBICON MINERALS:
Lexam Explorations Inc. has a beneficial interest in 4,405,329 Common Shares of Rubicon Minerals. Rob McEwen is Chairman and Chief Executive Officer of Lexam and owns 49.4% of its outstanding shares.

GUYANA GOLDFIELDS:
Rob McEwen has dispositive power over certain share of Gayana Goldfields held in trust by Charitable Gift Funds of Canada, such shares have been committed to fund charitable contributions over an indefinite time period.