As December begins, U.S. stock futures have taken a downturn, with significant declines in tech stocks and cryptocurrency markets. The Dow Jones, S&P 500, and Nasdaq all opened in the red, while bitcoin is trading below $87,000, signaling a bearish start to the month. This downturn follows a rocky November for the markets, where the previous five-day winning streak is now at risk due to tumbling crypto stocks and disappointing performances from major tech companies like Nvidia. Investors are closely monitoring upcoming U.S. economic data and speeches from Federal Reserve officials, which could influence market trends in the near future.