Oil prices suffered a deep sell-off late Monday, with global benchmark Brent crude tumbling more than 11% to $68.36 a barrel in post-settlement trading, the steepest one-day decline so far this year. U.S. benchmark West Texas Intermediate also sank, losing more than $4, or roughly 6%, in early Asian hours. Brent’s fall exceeded $7, or about 9%, immediately after the official close before extending losses into after-hours dealings. The sudden drop wiped almost $10 from Brent’s price, which had hovered around $78–$80 earlier in the session, underscoring heightened volatility as traders reassess the supply-and-demand outlook for the second half of 2025.