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One of the oddest side effects of the credit crunch, which most recently brought about the nationalization of mortgage giants Fannie Mae and Freddie Mac: Salesforce.com shares are soaring. Fannie and Freddie's fall hasn't boosted Salesforce's business. But Freddie Mac has been taken off the S&P 500 stock index, which made room for Salesforce.com. Index-tracking funds which are required to match its makeup have been buying Salesforce.com as a result.