NEW YORK — Shares of large banks were falling Wednesday faster than much of the broad market retreat ahead of the second-quarter earnings season, as investors worried that losses would still be high and that sentiment had gotten too bullish.

Bank of America Corp., which is expected to report late next week, was one of the worst decliners, falling 3.8% to $11.68 in recent trading. Recently there has been increasing concern about how much the giant bank will have to put aside for loan losses this quarter and in particular charges related to its shotgun wedding to Merrill Lynch.

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