Over the past few years, just a few large-cap technology stocks have powered the stock market’s returns. That trend shows no signs of abating anytime soon, as demand for artificial intelligence continues to send the tech sector higher.

A highly concentrated market can—and has—turbocharged returns, but it also comes with downsides. As tech stocks soar, fund investors may find themselves with portfolios that are significantly less diverse than expected thanks to the outsize influence of a handful of firms like Nvidia NVDA and Microsoft MSFT. Dominic Pappalardo, chief multi-asset strategist for Morningstar Wealth, discusses how today’s narrow market compares with history and how investors can mitigate concentration risk in their portfolios. Morningstar Wealth is part of a registered investment advisor, Morningstar Investment Management.

https://www.morningstar.com/markets/whatever-happened-broadening-stock-market-rally

On this episode:

What do strategists mean when they talk about concentration risk?

How did today’s narrow market develop? What forces and trends brought us here?

How unusual is today’s narrow stock market compared with history?

When the market has been concentrated in the past, what has caused that concentration to dissipate?

Are the risks associated with high concentration greater for passive index investors? Why?

Wall Street has been warning about concentration risk for the better part of two years. But stocks are still hitting record highs, and the weightiest stocks are still performing the best. Why do some strategists say they aren’t as concerned about concentration risk? Do investors really need to be worried?

What are some strategies investors can use to mitigate the risk of a highly concentrated market without leaving too much upside on the table?

What’s the most important thing investors should remember right now?

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The Stock Market Is Ultraconcentrated, and It Could Get Worse. Here’s How to Manage the Risks.

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