The S&P 500 (SPY) ETF is usually the most heavily-traded U.S. security, but at 59M shares...

|By:, SA News Editor

The S&P 500 (SPY) ETF is usually the most heavily-traded U.S. security, but at 59M shares (as of 2:30 ET), it's at just 39% of its average volume over the last month. Leading today are Yahoo (YHOO +9.5%) as it soars following earnings, and Bank of America (BAC +2.9%) as it flies to a multi-year high after its profit report. Yahoo has traded 68M shares (440% of normal volume), and BofA 204M shares (177% of normal volume).