Market Observers Show Concern Technology ETF Sector Rallied Too Far

The PowerShares QQQ (NasdaqGM: QQQ), which tracks the tech heavy Nasdaq-100 Index, is up 5.5% over the past month while the Technology Select Sector SPDR (NYSEArca: XLK) is higher by more than 7% over the same period. While impressive, those performances have some market observers concerned that...