UBS warns of tech concentration risk as stocks hit new highs

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 740.62 --0 (-0%)
Previous Close $740.62    52 Week High $119.66 
Open $740.62    52 Week Low $94.84 
Day High $740.62    P/E N/A 
Day Low $740.62    EPS $0.00 
Volume 393,444