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Want to know what’s next for the economy if the U.S.-Iran war persists? CNBC’s Jim Cramer said Tuesday’s stock market action gave investors a warning.

Despite eking out a small last-minute gain, the S&P 500

was down for most of the session as President Donald Trump’s deadline for Iran to strike a deal and reopen the Strait of Hormuz approached with little signs of progress, dimming hopes of a resolution between the two countries. Trump has threatened to destroy Iran’s bridges and power plants if an agreement isn’t reached by 8 p.m. ET Tuesday. The Dow Jones Industrial Average