Oil futures fell on Thursday, retreating from big gains in the previous session, as the prospect that any deal in nuclear talks with Tehran and a possible increase in its crude exports helped to keep pressure on prices. Major powers and Iran have stretched talks on Tehran’s nuclear program into a second day past an end-March deadline, with diplomats saying the chances for a preliminary deal were balanced between success and collapse. Both Brent and U.S crude prices snapped three-session losing streaks on Wednesday, gaining $2 or more after data from the Energy Information Administration (EIA) showed a fall in rigs drilling for oil resulted in a drop in U.S. output last week for the first time since late-December. Brent crude for May delivery LCOc1 was down 46 cents at $56.64 a barrel by 3.06 a.m. ET. The contract had settled $1.99 higher on Wednesday. U.S. […]