According to foreign media reports,an institutional billionaire index shows that the collective wealth of the world’s 500 richest people has increased by a record $2.2 trillion this year. With all markets—from stocks to cryptocurrencies to precious metals—booming, the value of their assets has soared, bringing their total net worth to $11.9 trillion.Tech giants led the gains, with the AI craze continuing to boost U.S. large-cap stocks. About a quarter of all the wealth growth recorded by the Institutional Wealth Index came from eight individuals, including Oracle (ORCL.N) Chairman Larry Ellison, Tesla(TSLA.O), Alphabet (GOOG.O) co-founder Larry Page, and Amazon (AMZN.O) founder Jeff Bezos.It is worth noting, however, that this is a smaller contribution than last year, when these eight billionaires accounted for 43% of total revenue.