US indices advance on Oct 31 as mega-cap tech led by Amazon fuels positive close

Market action in the United States on Oct 31 carried a constructive tilt as the Nasdaq gained 0.7% and the S&P 500 rose 0.3%. Amazon soared 10.8% following its 20% year-over-year cloud revenue growth in Q3. Tesla climbed 3.1% and Nvidia as well as Oracle logged meaningful traction driven by AI momentum. Netflix added 2.9% after announcing a 10-for-1 stock split that boosted sentiment. Meta declined 2.7% on higher capex guidance and AbbVie fell 4.5% amid concerns related to drug pricing risks. The Nasdaq ended October with an approximately 4.9% monthly advance.