Few companies illustrate investors' love-hate relationship with financial services stocks this year better than Capital One Financial Corp.

Last week was a Wall Street love-in for Capital One, as investors bid up its shares 15.4%, to $116 by Friday afternoon, outperforming such banking companies and other competitors as MBNA Corp., Providian Financial Corp., and American Express Co. For the year the stock was up a stunning 115.5%.

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