UBS warns of tech concentration risk as stocks hit new highs

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 716.05 -1.46 (0.2%)
Previous Close $717.51    52 Week High $119.66 
Open $720.39    52 Week Low $94.84 
Day High $721.50    P/E N/A 
Day Low $712.61    EPS $0.00 
Volume 24,667,410