By Caroline Valetkevitch NEW YORK (Reuters) -The S&P 500 and Nasdaq ended lower on Friday, with investors on edge over the Iran-Israel conflict heading into the weekend, as the U.S. considers whether to get involved. Trading was choppy for much of the session. The S&P 500 also ended lower for the week, while the Nasdaq registered a weekly gain. Iran said it would not discuss the future of its
S&P 500, Nasdaq finish lower; investors uneasy about Middle East conflict
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