S&P 500 edges lower as investors hold their breath ahead of economic data

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 716.92 +12.20 (1.73%)
Previous Close $704.72    52 Week High $119.66 
Open $715.95    52 Week Low $94.84 
Day High $718.04    P/E N/A 
Day Low $713.32    EPS $0.00 
Volume 37,238,941       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 762.60 +8.55 (1.13%)
Previous Close $754.05    52 Week High $219.60 
Open $763.15    52 Week Low $181.02 
Day High $763.57    P/E N/A 
Day Low $759.96    EPS $0.00 
Volume 50,917,637