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Treasury yields tumbled on Thursday to a nearly 6-month low a day after President Trump announced sweeping tariffs that shook stock markets around the world.

Domestic carmakers' shares fell Thursday morning after auto-specific tariffs took effect at midnight.

(Bloomberg) -- Roughly $1.7 trillion was erased from the S&P 500 Index at the start of trading on Thursday amid worries that President Donald Trump’s sweeping new round of tariffs could plunge the economy into a recession.Most Read from BloombergMetro-North Is Faster Than Acela on NYC-New Haven Route After Signal UpdatesLondon Clears Final Hurdle for More High-Speed Trains to EuropeLocal Governments Vie for Fired Federal WorkersChicago School District Agrees to Minimum 16% Teacher Pay RaiseThe d

Stock-market investors are playing defense today.

Medical devices, or the medtech sector, are not immune from the reciprocal tariffs announced by Trump yesterday.

The Magnificent Seven stocks all tumbled Thursday in the wake of the Trump administration’s sweeping reciprocal tariffs—with Apple faring worst of all.

Shares of Aldeyra Therapeutics plummeted nearly 75% Thursday morning after the Food and Drug Administration said the company's dry eye disease drug has not proven to be effective in enough studies.