U.S. stock futures opened lower on Sunday night, setting a cautious tone ahead of a significant week for the market. The Dow Jones Industrial Average futures fell by 98 points, or 0.2%, while S&P 500 futures declined by 0.5%. Nasdaq futures experienced a more substantial drop, falling 214 points, or nearly 1%. This downturn comes as investors brace for earnings reports from major tech companies, including Meta Platforms, Microsoft, Tesla, and Apple, which are part of the 'Magnificent 7' and are scheduled to report their quarterly results this week. The market is also anticipating the Federal Reserve's January meeting and the release of the personal consumption expenditures price index, which could influence future interest rate decisions. The week's developments are crucial as they may provide further insight into the sustainability of the current bull market, particularly in the technology sector, with investors closely watching how artificial intelligence-powered market gains will fare amidst these Big Tech reports.