U.S. Oil Stockpiles Jump by Most in 3.5 Years

America's stored crude oil jumped 17.4 million barrels to 424.4 million in the week ended August 7, 2026 — the biggest one-week rise in 3.5 years, per government data reported by Reuters. Weekly changes usually stay in the low millions. A jump this large is rare enough to make oil traders rethink their bets across the market.