Considering the sectors do worst as of noon Thursday, shares of Technology & Communications businesses are underperforming other sectors, demonstrating a 0.6% decline. Seagate Technology plc, meanwhile, is down 23.58% year to date, and Western Digital Corp., is down 29.69% year to date. United, STX and WDC make up about 0.4% of the underlying holdings of XLK.

Another worst performing sector is the Energy sector, demonstrating a 0.5% decline. One ETF strongly monitoring Energy stocks is the Energy Select Sector SPDR ETF (XLE), which can be flat on the day in noon trading, and up 7.31% on a year to date basis. Transocean Ltd., meanwhile, is down 26.17% year to date, and EQT Corp. is up 27.20% year to date. United, RIG and EQT make up about 1.1% of the underlying holdings of XLE.