Wall Street ends mixed as worries linger before Good Friday break

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SPDR DOW JONES INDUSTRIAL AVERAGE ETF TRUST (NYSE: DIA) Delayed: 517.91 +0.83 (0.16%)
Previous Close $517.08    52 Week High $189.39 
Open $514.68    52 Week Low $154.38 
Day High $518.31    P/E N/A 
Day Low $512.97    EPS $0.00 
Volume 2,519,042       

PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 718.97 -18.98 (2.57%)
Previous Close $737.95    52 Week High $119.66 
Open $715.74    52 Week Low $94.84 
Day High $723.61    P/E N/A 
Day Low $713.28    EPS $0.00 
Volume 24,234,721       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 736.98 -7.41 (1%)
Previous Close $744.39    52 Week High $219.60 
Open $733.81    52 Week Low $181.02 
Day High $739.63    P/E N/A 
Day Low $732.30    EPS $0.00 
Volume 21,398,341