U.S. stocks gain on upbeat corporate outlooks By: MarketWatch July 30, 2013 at 10:07 AM EDT U.S. stocks climb as Aetna and others hike their 2013 profit outlooks and investors look to results from Federal Reserve’s policy session. Read More >> Related Stocks: Aetna Community Health Systems Eastman Chemical JPMorgan Chase & Co Sentinelone Inc Cl A