Wall Street Week Ahead: Positive momentum in the face of headwinds

NEW YORK (Reuters) - To borrow from Star Wars, the Force is strong with this stock market. Despite a ho-hum earnings season and central banks disappointing hopes for aggressive economic stimulus this week, U.S. stocks held firm. After four days of losses, the benchmark Standard & Poors 500 index rallied on Friday, finishing the week in the positive for a fourth straight time and reaching three-month highs. Sustaining momentum are valuations that make stocks attractively priced relative to other assets. ...