<h1>Market momentum slows, pushing major US equity indexes lower as key economic reports and issuer tensions shape near term outlook.</h1> US equity markets eased with the S&P 500 and Nasdaq declining and the Dow edging down, driven in part by a large issuer's share weakness linked to tensions between its chief executive and a major political figure; Treasury yields held steady ahead of pending manufacturing and job openings reports that could affect near term market direction.