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: 517.55 -1.79 (0.34%)
Previous Close $519.34    52 Week High $189.39 
Open $517.06    52 Week Low $154.38 
Day High $518.38    P/E N/A 
Day Low $515.19    EPS $0.00 
Volume 1,474,272       

NASDAQ OMX Group (NASDAQ: NDAQ) Delayed: 107.92 -0.7 (0.64%)
Previous Close $108.62    52 Week High $71.92 
Open $108.09    52 Week Low $54.62 
Day High $108.57    P/E 47.96 
Day Low $106.90    EPS $2.25 
Volume 1,148,041       

PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 687.35 +6.26 (0.92%)
Previous Close $681.09    52 Week High $119.66 
Open $684.39    52 Week Low $94.84 
Day High $688.69    P/E N/A 
Day Low $683.18    EPS $0.00 
Volume 17,835,683       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 755.90 +3.80 (0.51%)
Previous Close $752.10    52 Week High $219.60 
Open $752.73    52 Week Low $181.02 
Day High $756.50    P/E N/A 
Day Low $752.39    EPS $0.00 
Volume 14,945,300