American crude oil market refers to American crude oil futures trading, which is a special trading method, so American crude oil futures trading is the American crude oil market.
American crude oil refers to crude oil futures listed and traded in the New York Mercantile Exchange, USA. American crude oil is a contract name in the series of American crude oil futures, a light crude oil futures contract in the New York Mercantile Exchange, a marked futures contract and one of the largest crude oil market futures contracts in the world.