Oil prices fell on Monday, dented by the rise in the U.S. dollar to seven-month highs, and analysts see more losses triggered by the mismatch between global supply and demand. The fall was part of a wider decline in commodities that has also been stoked by worries over faltering demand from China, with prices for base metals such as copper and nickel tumbling. However, speculators have turned increasingly negative on crude. U.S. West Texas Intermediate (WTI) crude futures CLc1 fell $1.26 a barrel to $40.64 a barrel by 0418 ET. The contract broke below $40 on Friday for the first time since August.