At the end of March, there was $117.6 billion in commodity exchange traded funds and notes listed in the U.S., according to data from the ETF Industry Association.
U.S. Oil Fund (NYSEArca: USO) is the largest oil ETF with $1.4 billion in assets. The fund invests in oil futures contracts.
The oil ETF is up 3% year to date, while U.S. Gasoline Fund (NYSEArca: UGA) has rallied 18.7%, according to Morningstar.
U.S. Gasoline Fund
