UBS warns of tech concentration risk as stocks hit new highs

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 712.40 +1.47 (0.21%)
Previous Close $710.93    52 Week High $119.66 
Open $715.23    52 Week Low $94.84 
Day High $715.39    P/E N/A 
Day Low $709.20    EPS $0.00 
Volume 11,419,195