Oil prices fell on Monday. Brent crude was at $42.04 a barrel, down 62 cents, the lowest since July 30. U.S. WTI crude skidded 63 cents, to $39.14 a barrel, the lowest since July 10. The prices fell as Saudi Arabia made the deepest monthly price cuts for supply to Asia in five months and uncertainty over China’s oil demand cloud the oil market’s recovery.