U.S. stock futures were unchanged on Wednesday after the S&P 500 and Nasdaq Composite set new record highs in the previous session. In extended trading, shares of Paramount Global jumped 7% on reports that the company reached a preliminary deal to merge with Skydance Media. During regular trading on Tuesday, the S&P 500 and Nasdaq Composite rose by 0.62% and 0.84%, respectively, while the Dow added 0.41%. These movements occurred amid the continued rise of mega-cap tech stocks, including Apple (1.6%), Amazon (1.4%), and Alphabet (1.2%). Tesla also surged by 10.2% after delivery numbers exceeded expectations, while Nvidia fell by 1.3% amid concerns about the sustainability of the AI-driven rally. Meanwhile, Federal Reserve Chairman Jerome Powell acknowledged progress on inflation but emphasized that the central bank is not yet ready to lower interest rates. On the data front, the JOLTS report showed a slight increase in job openings in May compared to the previous month.