This index fund has a rock-bottom fee structure and exposure to the hottest stocks in the market.

Megacap technology stocks are starting to look a little expensive, especially after recent moves in stocks like Nvidia ( NVDA 1.68% ) and Advanced Micro Devices ( AMD -1.13% ) . It's tough to know which large tech stocks are trading for a fair valuation, which ones still have the most opportunities to grow, and which ones might be a little too expensive.

One solution is to invest in the megacaps through an ETF. Vanguard has an excellent choice, the Vanguard Mega Cap Growth ETF ( MGK -0.22% ) . As the name suggests, this is an index fund that tracks an index of the largest growth stocks in the U.S. stock market.

With a rock-bottom 0.07% expense ratio , you'll only

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