Oil jumped more than 5% on monday- Hedge funds increased bullish oil bets.

Oil prices jumped more than 5 percent on Monday as traders reassessed how quickly Iran might increase exports after a preliminary nuclear deal and anticipated that a months-long rise in U.S. crude inventories may be slowing.

Brent crude's rally followed Thursday's nearly 4 percent tumble after Iran and six world powers announced a framework agreement on the OPEC member's nuclear programme. But initial expectations of a quick recovery in oil exports were tempered by views that it could take longer than expected to roll back sanctions.

Hedge funds increased bullish oil bets by the most in four years as negotiators worked to reach a deal over Iran’s nuclear program. Speculators boosted their net-long position in crude by 21% during the seven days ended March 31, CFTC data show, the biggest percentage increase since March 2011. Short positions declined by the most in three months.