The S&P 500 and Nasdaq Composite have both seen gains in 2021, with the S&P up over 9% and the Nasdaq up 25% year to date. However, these gains are largely driven by just seven tech companies: Alphabet, Amazon, Apple, Meta, Microsoft, Tesla, and Nvidia, which have collectively seen a 46% increase in value since the start of the year. In contrast, the combined market cap of the other 493 stocks in the S&P 500 index has decreased by 3%. Nvidia has had an exceptional year, with a 158% increase in value and one of the largest single-day market cap gains in US stock market history on May 25th.