US stock markets opened lower on December 1st, with major indices including the Dow Jones, S&P 500, and Nasdaq all slipping amid cautious investor sentiment ahead of key economic data and Federal Reserve Chair Jerome Powell's upcoming speech. The Nasdaq fell 0.4%, the S&P 500 declined approximately 0.45%, and the Dow dropped around 0.73%. Despite a strong late-November rally, markets are now experiencing volatility, with the Nasdaq and S&P 500 showing signs of a possible pause in their upward momentum. Bitcoin plunged over 7%, falling below $85,000 due to concerns over global interest rate hikes, particularly in Japan, which triggered fears of a sell-off in cryptocurrencies and related stocks like Coinbase, Strategy, and Robinhood. Oil prices rose above $63 per barrel amid geopolitical tensions and supply concerns, including attacks on key pipelines and Venezuela tensions. The US manufacturing sector contracted for the ninth consecutive month, with the ISM PMI at 48.2, indicating ongoing supply chain and cost pressures. Meanwhile, tech giants like Apple and Nvidia saw gains, with Nvidia investing $2 billion in Synopsys to expand AI capabilities. Market analysts highlight that the December 'Santa rally' may not materialize this year, as uncertainty remains high, and market conditions are influenced by geopolitical risks, inflation, and monetary policy expectations.