Bank of America Corp.’s poor third quarter surprised Wall Street, resulting in Chief Executive Kenneth Lewis to imply that the company may leave investment banking. Bank of America posted a 32 percent profit drop for its third quarter. The bank’s report suggests that the credit crunch is far from over, analysts say. “I’ve had all of the fun I can stand in investment banking at the moment,” Lewis told the Associated Press. “So to get bigger in it is not something I really want to do.”