Investing in choppy markets, especially with an unpredictable president at the helm, can be distressing. It can be even more so if you are relying on these investments to pay for something as important as your child’s college tuition, and you need the money in the foreseeable future.

Plenty of busy parents found themselves in this position last week, reminded by the recent market plunge that college enrollment was creeping up on them, and some may not have dialed back their risky stock positions, or at least not enough.

But situations like this serve as another reminder: Market uncertainty is a constant, and yet it is part of the game we are forced to play to finance our future selves’ needs and wants. Markets periodically plunge because of global financial crises, pandemics, technology bubbles, and when the president of the United States seemingly pushes it over the edge with his index finger, which is essentially what happened after President Trump announced an aggressive tariff plan that sparked a trade war.

When Mr. Trump noticed on Wednesday that U.S. government bond markets were trembling, or getting “yippy,” as he called it, he paused most of his so-called reciprocal tariffs.

The markets rejoiced, sending the S&P 500 soaring up 9.5 percent, before sliding nearly 3.5 percent on Thursday and recovering 1.8 percent on Friday, with one measure of volatility reaching levels last seen during the pandemic-induced sell-off in 2020. The S&P 500 has sunk 12.9 percent since Feb. 19, when it reached an all time closing high. Nobody knows what comes next, or how this movie ends.

If you have money in a 529 college savings plan — or in another type of investment account — now is the time to reassess whether your mix of stocks and bonds are appropriate for your time frame and your stomach for risk.