The worst-performing ETFs all have one big thing in common By: CNBC.com News May 17, 2017 at 13:58 PM EDT Out of all the large non-leveraged U.S.-listed exchange-traded funds, the six worst-performing are all closely tied to oil prices. Read More >> Related Stocks: Energy Select Sector SPDR S&P Oil & Gas Expl & Prod SPDR Vaneck Oil Services ETF