Oil prices fell sharply fell for a fifth straight trading session, reaching a two-week low on hopes of a renewed diplomatic push to end the Iran war and optimism over the reopening of a critical pipeline in Saudi Arabia. ↧ Oil prices tumble to 2-week low on hopes for critical pipeline reop... Brent crude oil briefly slipped below $98 per barrel early Tuesday while U.S. crude oil fell below $93 per barrel, their lowest prices since Sept. 8.