U.S. stock index futures were flat on Tuesday as investors remained cautious a day ahead of a long-anticipated monetary policy decision by the Federal Reserve, while Nvidia gained after the chip giant received approval to sell some of its processors to China. .N

** Nvidia Corp NVDA.O:BUZZ - Rises after Trump says US to allow H200 chip shipments to China nL6N3XF0HU

** Ares Management Corp ARES.N:BUZZ - Rises on S&P 500 inclusion nL6N3XF0JT

** Colgate-Palmolive Co CL.N:BUZZ - Shares rise as RBC upgrades to 'outperform' nL6N3XF0DK

** Alexander & Baldwin Inc ALEX.N:BUZZ - Shares jump on $2.3 billion go-private deal nL6N3XF0JZ

** Newmont Corp NEM.N:

** Gold Fields Ltd GFI.N:

** Agnico Eagle Mines Ltd AEM.N:

** Kinross Gold Corp KGC.N:

BUZZ - Gold miners gain as gold prices rise ahead of Fed meeting nL6N3XF0ME

** Deere & Co DE.N:BUZZ - Jefferies raises Deere's PT, cites tech-driven automation roadmap nL4N3XF0RU

** Toll Brothers Inc TOL.N:BUZZ - Falls after Q4 profit miss nL6N3XF0NS

** Pfizer Inc PFE.N:BUZZ - Partners with China's YaoPharma for weight-loss drug; shares up nL4N3XF0V9

** Vor Biopharma Inc VOR.O:BUZZ - Jumps as J.P.Morgan initiates with 'overweight' rating nL4N3XF0VA

** Core & Main Inc CNM.N:BUZZ - Gains after upbeat quarterly profit, share buyback hike nL4N3XF0VM

(Rajarshi Roy and Yagnoseni Das In Bengaluru)

((Rajarshi.Roy@thomsonreuters.com))