Best of all, shares of the company are historically cheap and producing a jaw-dropping annual yield. Investors can pick up Pfizer stock right now for an estimated 7 times forecast earnings for 2026. To boot, its nearly 8% dividend yield is nearing the highest level in the company's storied history.

Pointing to data showing run-ups in foreign purchases of U.S. stocks before the 1987 crash, the dot-com bubble in 2000, and the 2008 financial crisis, Ed Yardeni wrote in his eponymous research newsletter, "Their buying has a record of being a contrary indicator. They tend to be big buyers right before bear markets."

I’m definitely purchasing with tariffs in mind,” one shopper tells MarketWatch amid the ongoing uncertainty around President Trump’s wide-ranging tariffs.