US stocks touched new highs on Monday as US-China trade talks unfolded in Madrid and investors awaited a pivotal Federal Reserve meeting later this week. The S&P 500 (^GSPC) rose nearly 0.5% to close above 6,600 for the first time. The tech-heavy Nasdaq Composite (^IXIC) jumped roughly 0.9% to notch its sixth consecutive record close. The Dow Jones Industrial Average (^DJI) edged up more than 0.1%. `` ```` The major US stock indexes are coming off a strong week in which the Nasdaq and the S&P 5 ...