Oil futures fell sharply Monday, hit by concerns over a global supply glut. September West Texas Intermediate crude dropped $1.54, or 3.7%, to end at $40.06 a barrel. The U.S. benchmark traded below $40 for the first time since April, notching a session low of $39.82. Concerns about production by members of the Organization of the Petroleum Exporting Countries, a rise in U.S. rig counts and large gasoline stockpiles contributed to the weakness, analysts said.
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