Wall Street ends down as megacaps give back gains

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 712.60 --0 (-0%)
Previous Close $712.60    52 Week High $119.66 
Open $712.60    52 Week Low $94.84 
Day High $712.60    P/E N/A 
Day Low $712.60    EPS $0.00 
Volume 285,311       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 744.78 --0 (-0%)
Previous Close $744.78    52 Week High $219.60 
Open $744.78    52 Week Low $181.02 
Day High $744.78    P/E N/A 
Day Low $744.78    EPS $0.00 
Volume 103,358