Energy, financials lead Wall St gains before Yellen speech

Wall Street was higher on Monday morning, led by a rally in energy stocks and a rebound in financial shares following a pounding on Friday after a dismal jobs report all but ruled out chances of an interest rate hike in June. The Nasdaq was on course for its highest one-day percentage gain since May 27. The Dow and S&P 500 were on course for their best day since May 25, which was also the last time the Dow ended up more than triple digits in terms of points.