Wall Street dips as healthcare lags before U.S. Fed statement

By Laila Kearney NEW YORK (Reuters) - Healthcare and materials stocks pulled Wall Street lower on Tuesday in a second straight day of quiet trading as investors cautiously awaited news from the U.S. Federal Reserve's two-day policy meeting. While the Fed is not expected to raise interest rates at its meeting ending on Wednesday, investors will scour Fed Chair Janet Yellen's comments for clues indicating a path for future rate hikes. “We're on auto pilot until we actually get the results of