NEW YORK (AP) -- The stock market ended the day Thursday lower following weaker earnings from banks.<br />
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Bank of America fell 5 percent after it reported an 11 percent slide in fourth-quarter net income, hurt by a slowdown in trading revenue.<br />
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The Dow Jones industrial average fell 106 points, or 0.6 percent, to close at 17,320.<br />
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The Standard & Poor's 500 index slid 18 points, or nearly 1 percent, to 1,992. The Nasdaq composite dropped 68 points, or 1.5 percent, to 4,570.<br />
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The Swiss franc soared after the country's central bank abandoned an increasingly expensive policy to limit the currency's rise.<br />
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Bond prices jumped. The yield on the 10-year Treasury note dropped to 1.74 percent from 1.86 percent.
