Oil Prices Slide on Oversupply ConcernsStock Market News for Monday, Sept. 29, 2025: S&P 500, Nasdaq Get a Lift From Big Tech StocksLast Updated:13 hours agoOil prices were tumbling on Monday after a report said that the OPEC+ cartel was likely to approve another production hike, sparking concerns about excess supply.The Brent international benchmark fell 1.4% to $68.25 a barrel, and West Texas Intermediate U.S. crude was down 1.6% to $64.69 a barrel.OPEC+ is likely approve another oil production increase of at least 137,000 barrels a day at its meeting Sunday, Reuters reported, citing three people familiar with the talks. The group of producers is trying to regain market share by pumping out more crude.