CNBC | Oil prices fall on supply concerns after four days of gains CNBC Benchmark oil prices fell on Tuesday, set to snap a four-day winning streak amid concerns about rising global supplies as OPEC weighs production cuts. Growing fears of an economic slowdown, which saw European and Asian stock markets tumble again, ... Oil loses steam as supply concerns add to negative economic outlook Oil Slides Further on Oversupplied Outlook Oil declines due to supply concerns after four days of gains |