What an Oil ETF Has to Do With Plunging Oil Prices

The oil market is in disarray, a result of a coronavirus-led collapse in demand, surplus supply following a price war and a shortage of storage. Yet there have been plenty of people willing to bet on a rebound in basement-level crude prices, and for many retail investors the vehicle of choice has been an exchange-traded fund. However, those wagers via the biggest American ETF -– the U.S. Oil Fund, or USO -– have contributed to market mayhem and helped push crude prices below zero.

It grew so huge so quickly that it became a sizable player in the market for West Texas Intermediate, the U.S. benchmark for crude. Investors piled in during March and April, convinced that oil prices that had been falling -- pushed down by a price war between Saudi Arabia and Russia that boosted production just as demand was slashed by pandemic-driven lockdowns -- would eventually recover once economies reopened. At different stages, the fund held about a quarter of all May and June contracts for WTI.