S&P 500 is on a 12-month tear as tariffs threaten 2025 outlook for U.S. stocks MarketWatch2025 Outlooks Goldman SachsBrokerages see 'uncertain' 2025 on worries over potential Trump tariffs ReutersGoldman Sachs tells investors Trump’s tariffs pose a major ‘event risk’ and to expect growth to slow in 2025 FortuneReturns from emerging markets likely to turn negative in 2025 - UBS Investing.com