Citigroup joined major brokerages in raising its year-end target for the S&P 500, citing renewed optimism in corporate earnings resilience and the accelerating momentum of artificial intelligence-driven growth. It sees the benchmark ending the year at 6,300, compare with 5,800 forecast previously.

U.S. stock futures slipped on Sunday, following a positive week for Wall Street and ahead of renewed trade talks with China set for Monday.

S&P 500 futures traded near the benchmark's record highs as talks provide a glimmer of hope for a US-China trade deal.