U.S. stocks steady on Yellen, euro slips before Greek vote

By Richard Leong NEW YORK (Reuters) - U.S. stock prices held steady on Wednesday as Federal Reserve chair Janet Yellen affirmed a likely interest rate increase by year-end, while the euro fell ahead of a Greek government vote on whether to accept tough terms for a vital third bailout. "If the economy evolves as we expect, economic conditions likely would make it appropriate at some point this year to raise the federal funds rate," Yellen said in a testimony prepared for a U.S. House pa