Nvidia led global market cap gains in 2024, adding $2 trillion to reach $3.28 trillion, driven by soaring AI chip demand. Apple remained the most valuable company, nearing $4 trillion, followed by Microsoft, Alphabet, and Amazon. Tech giants boosted global indexes, with the S&P 500 rising 23.3% and Nasdaq 28.6%. Analysts predict strong 2025 growth fueled by AI investments and favorable conditions.