Yahoo Finance: Scott Rostan “Yellen, oil move Wall St.; Twitter changes; Amazon, Google hit the road “

Stocks (^DJI, ^GSPC, ^IXIC) are trading higher as Wall Street focuses on congressional testimony from Fed Chair Janet Yellen and a surprise drop in U.S. oil (OIL) inventories. Keith Bliss of Cuttone & Co. joins us live from the floor of the New York Stock Exchange to discuss the markets. To talk about some of the other stories that Yahoo Finance is keeping an eye on today, Alexis Christoforous is joined by Yahoo Finance Editor-in-Chief Andy Serwer and Scott Rostan, president & founder at Training The Street