Stock market today: Dow futures fall, S&P 500 and Nasdaq futures climb ahead of Fed decision, Big Tech earnings

US stock futures were mixed ahead of a critical day for markets, with a Fed decision and earnings results from Microsoft (MSFT) and Alphabet (GOOG) on deck. Futures on the Dow Jones Industrial Average (YM=F) traded flat, while those on the S&P 500 (ES=F) rose 0.2%, and contracts for the tech-heavy Nasdaq-100 (NQ=F) gained 0.3%. Sentiment in the tech trade has markedly improved this week, with the S&P 500 and Nasdaq posting back-to-back gains. Semiconductor stocks drove the rally on Tuesday after Broadcom's CEO negotiated for a consortium of banks to announce a $63 billion financing structure for building AI compute capacity. They continued to gain Wednesday after South Korean memory chipmaker SK Hynix (SKHY, 000660.