Oil swung on a CNN report that Israel is preparing to potentially strike Iranian nuclear facilities, while traders assessed data showing an increase in US crude stockpiles.Most Read from BloombergCan Frank Gehry’s ‘Grand LA’ Make Downtown Feel Like a Neighborhood?

The negotiations represent a milestone in the fraught relations between the two nations over Iran's program, which is enriching uranium close to weapons-grade levels.

Major stock indexes eased while longer-dated U.S. Treasury yields inched higher on Tuesday, with investors focused on U.S. fiscal concerns as Congress debated a bill for sweeping tax cuts.