The biggest U.S. stocks have done great for you. Experts say not to get greedy
Reported by CNBC · cnbc.com · August 22, 2026
Low-cost S&P 500 index funds are the foundation of many portfolios to grow wealth, but investors should add assets to diversify and lower volatility.
What the tape says
What to watch: Watch downstream inventory builds; restocking cycles often precede sector-wide multiple expansion.
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