Stock Market: Expensive, Complacency

The market has never been this expensive while at the same time so few people are worried that it might go down. (Select Sector Financial Select Sector SPDR ETF (XLF), Energy Select Sector SPDR ETF (XLE), SPDR S&P 500 Index ETF (SPY), SPDR Dow Jones Industrial Average ETF (DIA), iShares Russell 2000 Index ETF (IWM), Nasdaq 100 Index ETF (QQQ))