S&P 500 earnings in the peak July 27 reporting week were driven more by margin expansion than by sales growth, with that week contributing 34.1% of index earnin

S&P 500 earnings in the peak July 27 reporting week were driven more by margin expansion than by sales growth, with that week contributing 34.1% of index earnings, Lance Roberts said. He also pointed to softer consumer credit and a tech-led rebound in market leadership.