Tech sector looks very expensive: Barclays

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PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 661.73 -13.76 (2.04%)
Previous Close $675.49    52 Week High $119.66 
Open $675.51    52 Week Low $94.84 
Day High $680.05    P/E N/A 
Day Low $661.14    EPS $0.00 
Volume 57,304,502