Wall St rallies as higher oil boosts energy stocks

By Tanya Agrawal REUTERS - Wall Street opened higher on Wednesday, extending gains from Tuesday, as oil prices rose and investors got more comfortable with the prospect of an interest rate hike as early as this summer. Oil rose towards $50 a barrel on Wednesday for the first time in seven months on expectations of shrinking supply due to well fires in Canada and other disruptions. Comments from policymakers in recent days have raised expectations of a rate hike in June, much sooner than previous