Core Insights - The S&P 500 index, which is weighted by market capitalization, has seen an unusual trend this year where an equal-weighted indexing approach has outperformed the index itself, indicating potential shifts in the stock market [1] Group 1: Market Trends - The performance of large-cap stocks, particularly Nvidia, Apple, and Microsoft, is significant as they collectively account for 19.4% of the State Street SPDR S&P 500 ETF Trust, which tracks the S&P 500 [1]