Investing.com - U.S. stock futures were mostly higher on Wednesday, with markets gauging uncertainties around geopolitics and trade, as well as the upcoming release of minutes from the Federal Reserve's latest gathering. U.S. President Donald Trump says he will probably meet with Russian counterpart Vladimir Putin before the end of the month following a summit between representatives from both countries on Tuesday. Elsewhere, Elon Musk's social media platform X is reportedly in talks to raise money at a $44 billion valuation.1. Futures point broadly higherU.S. stock futures mostly ticked up as investors assessed the outcome of extraordinary talks between the U.S. and Russia on ending the war in Ukraine as well as a fresh tariff threat from President Trump.By 03:33 ET (08:33 GMT), the Dow futures contract was mostly unchanged, S&P 500 futures had risen by 4 points or 0.1%, and Nasdaq 100 futures had advanced by 25 points or 0.1%.The main averages on Wall Street all closed higher on Tuesday after oscillating around the flatline for much of the session, with the benchmark S&P 500 in particular notching a new all-time peak. In individual stocks, shares in Intel (NASDAQ:INTC) soared on a report that peers Taiwan Semiconductor Manufacturing Co. and Broadcom (NASDAQ:AVGO) were mulling deals that would cleave the chipmaker in two, Constellation Brands' (NYSE:STZ) stock price climbed after Warren Buffett's Berkshire Hathaway (NYSE:BRKa) unveiled a new investment in the group.Uncertainty around the geopolitical environment and a ratcheting up in international trade tensions are both looming in the background of a holiday-shortened trading week, although analysts noted that there were no major alterations to recent developments that have driven markets.