Schwab says it wants to get smaller. Its stock price is already doing just that.Shares of online stockbroker The Charles Schwab Corporation (SCHW -9.03%) tumbled 8.8% through 12:55 p.m. EDT Tuesday despite beating analyst forecasts for the second quarter on both the top and bottom lines.Heading into the quarter, analysts expected Schwab to report a $0.72 per-share profit on sales of $4.68 billion. In fact, Schwab earned $0.73 on sales of $4.69 billion -- and with a bigger net-interest margin of 2.03%.Charle ...