The Motley Foolยท2025-08-24 18:32Group 1 - The "Ten Titans" are the largest growth-focused U.S. companies, comprising approximately 38% of the S&P 500 [2][9] - The combined market capitalization of the Ten Titans is $20.2 trillion, a significant increase from $2.5 trillion a decade ago [6] - The Ten Titans have contributed 51.6% of the S&P 500's market cap growth over the last decade, which totaled $34.3 trillion [8] Group 2 - The Vanguard S&P 500 ETF is highlighted as a low-cost option for investors seeking exposure to the Ten Titans, with an expense ratio of 0.03% [4][5] - The S&P 500 has transformed into a growth-focused index due to the concentration of the Ten Titans, which may not suit all investors [9][12] - Investors with a high risk tolerance may benefit from the concentrated nature of the index, while risk-averse investors might need to adjust their portfolios to avoid overexposure to growth stocks [14]