Nasdaq Composite falls 2.7%, heading for biggest drop since 2012

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SPDR DOW JONES INDUSTRIAL AVERAGE ETF TRUST (NYSE: DIA) Delayed: 520.77 +4.15 (0.80%)
Previous Close $516.62    52 Week High $189.39 
Open $516.19    52 Week Low $154.38 
Day High $522.43    P/E N/A 
Day Low $516.01    EPS $0.00 
Volume 2,633,120       

NASDAQ OMX Group (NASDAQ: NDAQ) Delayed: 82.28 -0.21 (0.25%)
Previous Close $82.49    52 Week High $71.92 
Open $82.50    52 Week Low $54.62 
Day High $83.36    P/E 36.57 
Day Low $81.99    EPS $2.25 
Volume 1,396,064       

PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 713.55 -0.1 (0.01%)
Previous Close $713.65    52 Week High $119.66 
Open $715.37    52 Week Low $94.84 
Day High $719.93    P/E N/A 
Day Low $710.88    EPS $0.00 
Volume 18,658,624       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 736.25 +2.67 (0.36%)
Previous Close $733.58    52 Week High $219.60 
Open $735.17    52 Week Low $181.02 
Day High $739.95    P/E N/A 
Day Low $734.11    EPS $0.00 
Volume 18,569,435