Nvidia has emerged as the best-performing stock in the S&P 500 over the past two decades, with an astonishing increase of 27,365%. Other top performers include AMD, with a gain of 4,817%, and TPL, which rose by 3,559%. Collectively, the top 25 stocks in the S&P 500 have shown significant growth, with Nvidia contributing 20% of the index's gains over the last year, outperforming all other firms. The Magnificent 7 stocks, which include Nvidia, have surged by 148% since the beginning of 2023, accounting for a substantial portion of the S&P 500's overall performance. In contrast, the remaining 493 companies in the index have achieved a 35% gain during the same period. The Magnificent 7 now represent approximately 31% of the S&P 500's total market capitalization, exceeding the combined market values of the stock markets in Germany, Canada, the UK, and France.