According to Evan (@StockMKTNewz), the largest stocks in the S&P 500, such as Apple, Microsoft, and Nvidia, closely overlap with the top holdings in the NASDAQ 100, indicating a strong tech sector influence on both indices (source: https://twitter.com/StockMKTNewz/status/1931727303156924671). For crypto traders, this concentration in technology and AI-driven companies suggests that major movements in these indices may signal risk-on or risk-off sentiment, directly impacting Bitcoin, Ethereum, and wider altcoin price action. Monitoring correlation trends between these indices and crypto assets remains critical for trading strategies.