Goldman Sachs analyst David Kostin said in a note to clients that rising earnings, coupled with stable margins, should lift the S&P 500 by 8% to Goldman's year-end target of 1750. The index ended at 1631.89 last Friday. Analysts expect S&P 500 companies' earnings to rise 2.9% in the second quarter from a year ago, while quarterly revenue is forecast to increase 1.5% from a year ago, according to data from Thomson Reuters.