Wall Street ends lower ahead of economic data, earnings

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 693.83 +8.55 (1.25%)
Previous Close $685.28    52 Week High $119.66 
Open $688.43    52 Week Low $94.84 
Day High $701.45    P/E N/A 
Day Low $687.87    EPS $0.00 
Volume 45,916,689       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 768.03 +13.68 (1.81%)
Previous Close $754.35    52 Week High $219.60 
Open $762.99    52 Week Low $181.02 
Day High $775.64    P/E N/A 
Day Low $762.64    EPS $0.00 
Volume 38,627,578