Drops for Nvidia and other superstar stocks are dragging U.S. stock indexes lower on Monday and keeping Wall Street stuck in its weekslong rut. The S&P 500 fell 0.8% in early trading, coming off its fourth losing week in the last five.

BMO Capital Markets forecasts the S&P 500 will reach 6,700, reflecting a gain of 13.2%. Chief investment strategist Brian Belski said he and his team "remain resolutely bullish," but expect "performance and fundamentals will more closely match the historical norms -- namely, in the high-single digit/low-double-digit percentage range in 2025."

Asian shares mostly rose Tuesday, deriving optimism from rising technology stocks on Wall Street, led by Nvidia. Japan's benchmark Nikkei 225 jumped 2.4% in morning trading to 40,248.68. Hong Kong's Hang Seng index slid 0.