If you own an S&P 500 index fund , artificial intelligence is already a major part of your investment strategy.
In recent years, the stock market's gains have been fueled largely by a small group of tech giants that are aggressively investing in AI.
Nvidia , Microsoft , Apple , Google parent company Alphabet and Amazon — the five biggest names in the S&P 500 — now represent nearly 30% of the entire index. And that concentration is reshaping the way investors experience diversification.
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