Monday Sector Laggards: Energy, Materials

In afternoon trading on Monday, Energy stocks are the worst performing sector, showing a 3.7% loss. Within the sector, Williams Cos Inc (NYSE: WMB) and Marathon Oil Corp. (NYSE: MRO) are two of the day's laggards, showing a loss of 9.0% and 7.6%, respectively. Among energy ETFs, one ETF following the sector is the Energy Select Sector SPDR ETF (AMEX: XLE), which is down 2.8% on the day, and down 9.70% year-to-date. Williams Cos Inc , meanwhile, is down 28.07% year-to-date, and Marathon Oil Corp....