Stocks rally as investors respond to Yellen's prepared testimony

Wall Street is gearing up for a rally ahead of Federal Reserve Chair Janet Yellen’s testimony on Capitol Hill this morning.  All three major averages look set to open sharply higher with technology stocks in the lead for now. Yahoo Finance’s Alexis Christoforous, Jared Blikre, Rick Newman and Randy Frederick, of the Schwab Center for Financial Research, discuss the day’s top stories. Those include a report that Apple (AAPL) is dealing with software bugs as it prepares to launch the next version of the iPhone later this year.