The S&P 500 tracks the 500 largest companies listed in the United States. It is the index most global investors use as a benchmark for how American stocks are doing. According to a recent Goldman Sachs note, almost 45% of that index is now made up of companies tied to artificial intelligence. Back in late 2022, when ChatGPT was first launched, that figure was around 25%.
The change highlights how rapidly AI has reshaped the market, with AI-linked companies now accounting for nearly half of the benchmark index investors use to gauge the health of U.S. equities and economy.
The companies driving this shift broadly fall into three major AI themes.
Still, the scale of the shift shows how deeply investors now believe AI will shape the future of corporate profits, productivity, and economic growth not just in the United States, but across the global economy
Two things
If you hold any US focused fund or ETF (like an S&P 500 tracker), you are already riding the AI wave and As long as AI companies keep posting strong earnings, your portfolio benefits from the rally without you having to pick individual stocks.
That same exposure cuts the other way, If AI sentiment cools or a few of these giants miss earnings, your returns will take a bigger hit than you might expect from a broad market fund.
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