Stocks of companies involved in the Vancouver 2010 Olympic Games have outperformed many major stock market indices this year, a Dow Jones index reveals.

The Dow Jones Summer/Winter Games index measures the performance of publicly traded companies that are official partners, sponsors and suppliers of the current Olympic Games. In December 2008, the index components were changed to reflect the companies involved in the Vancouver 2010 Games.

Since December, the index has gained 30.39%. This compares with a 16% gain in the Dow Jones Global Titans 50, a 25.84% gain in the Dow Jones STOXX 50 Index in Europe, and a 24.98% boost in the Dow Jones Asian Titans 50.

U.S. stocks displayed the weakest performance during the period, with the Dow Jones industrial average gaining 13%, while Canadian blue chips had the strongest gains, up 52.23% in the same time frame.

The Summer/Winter Games Index is comprised of 35 stocks. The top three components by float-adjusted market capitalization are General Electric, Coca Cola Co. and McDonald’s Corp. Other large players include Royal Bank of Canada, 3M Co. and BCE Inc.

Nearly 60% of the index components are U.S.-based companies, while nearly 30% are Canadian and the remainder are international.