US stock markets opened higher on October 31, with the Dow Jones Industrial Average rising 0.07%, the S&P 500 up 0.7%, and the Nasdaq Composite gaining 1.5%. Apple shares increased by 2%, reaching a new record high, driven by record Q4 revenue and positive forecasts for the next fiscal quarter. Amazon shares surged 12% following better-than-expected Q3 results, particularly in cloud services, marking their fastest growth in three years. Nvidia also saw a 1.7% rise after securing a deal to supply over 260,000 AI chips to a South Korean company. Reddit's stock jumped 12.8% after it raised its fourth-quarter earnings forecast.