S&P 500 ends up slightly with boost from financials; Netflix up late

By Caroline Valetkevitch NEW YORK (Reuters) - The S&P 500 ended a choppy session slightly higher on Wednesday, helped by a rise in financials after Federal Reserve Chair Janet Yellen said it "makes sense" to gradually lift interest rates. The S&P financials index rose 0.8 percent, adding to gains late in the session following Yellen's remarks to the Commonwealth Club of California in San Francisco. Financials have rallied since the November U.S. election on expectations of higher rates a