index fund

American  

noun

1. a fund, as a mutual fund or pension fund, with a portfolio that contains many of the securities listed in a major stock index in order to match the performance of the stock market generally.

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Etymology

Origin of index fund

First recorded in 1975–80

Example Sentences

See Examples For:

index fund

Meanwhile, if you are buying a traditional S&P 500 index fund, right now, 8% of your money is going into one stock: Nvidia.

From MarketWatch ● Aug. 31, 2026

If SpaceX is allowed to try really hard to infiltrate your sensible money-market index fund, why not put it into something you’re actually passionate about, like an ultra-rare mint condition Umbreon card?

From Slate ● Aug. 31, 2026

Today is the 50th anniversary of the launch of the Vanguard Group’s pioneering S&P 500 index fund.

From MarketWatch ● Aug. 31, 2026

If they’re optimistic about the AI trade and the biggest hyperscalers, a traditional index fund may fit best.

From The Wall Street Journal ● Aug. 31, 2026

An index fund holding publicly traded stocks can generate almost no tax bills for as long as you own it, especially if it’s a broadly diversified ETF.

From The Wall Street Journal ● Jul. 31, 2026