NEW YORK, June 16 (Reuters) - U.S. crude futures edged up on Thursday in volatile trading as a demand forecast hike by the International Energy Agency helped stabilize oil prices after the previous session's slump.
Investors remained cautious about the efforts to deal with Greece's debt woes and the potential the problems might spread to other euro zone economies. July crude oil options expired on Thursday, adding to the trading volatility, sources said.
On the New York Mercantile Exchange, July crude