Wall St Slips Ahead of Yellen’s Speech

The S&P 500 and the Dow were set for their first back-to-back losses since late-January on Friday, as investors preferred to wait and watch Federal Reserve Chair Janet Yellen’s speech for a steer on the chances of an interest rate hike this month. Yellen could support a rising sentiment among policymakers for an increase in rates amid data pointing to an improving U.S. economy.