S&P 500 finished little changed after a volatile session

The S&P 500 finished little changed after a volatile session yesterday, as investors continued to be spooked by uncertainty on both domestic and international issues.  The Dow eked out a gain. The S&P oscillated between positive and negative territory after failing to sustain an opening rally spurred by hopes for progress in U.S.-China trade negotiations.  A Chinese Commerce Ministry spokesman had said Washington and Beijing were in close contact over trade. The Dow Jones gained ...