S&P 500 ends lower after another wild ride

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 728.95 -14.62 (1.97%)
Previous Close $743.57    52 Week High $119.66 
Open $737.98    52 Week Low $94.84 
Day High $740.53    P/E N/A 
Day Low $726.39    EPS $0.00 
Volume 52,099,074       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 769.60 -8.41 (1.08%)
Previous Close $778.01    52 Week High $219.60 
Open $774.92    52 Week Low $181.02 
Day High $776.35    P/E N/A 
Day Low $766.71    EPS $0.00 
Volume 55,636,373