Wall Street's main indices have dipped in a choppy session as a drop in General Electric shares countered positive retailer earnings and investors eyed a key resistance level for the benchmark S&P 500 after the market's strong run.

Wall Street's main indices have dipped in a choppy session as a drop in General Electric shares countered positive retailer earnings and investors eyed a key resistance level for the benchmark S&P 500 after the market's strong run.