Goldman Sachs lowers its year-end target for the S&P 500 index to 5,700 points, down 8% from the previous estimate.The downgrade is attributed to a higher recession risk and tariff-related uncertainty.The new forecast implies that the S&P 500 will gain about 2% this year.Stocks in the U.S. continue to selloff due to fears of the impact of Trump's trade war on the global economy.