Oil funds are one of the few assets performing worse than oil itself. Exchange-traded fund United States Oil Fund is down 22% so far this year, while the iPath S&P GSCI Crude Oil Total Return Index exchange-traded note is down 26% in that period. In comparison, U.S. crude-oil futures for March delivery settled at $29.64 a barrel on Friday, down 20% this year. Read the original story from The Wall Street Journal.