Merck lowered its full-year profit guidance and said tariffs would mean an extra $200 million in costs this year. The stock rose 0.6% to $79.24 shortly after it posted first quarter earnings. Shares had been up about 1% prior to the report.

Merck & Co. said it expects to lose $200 million to already-announced tariffs in 2025 amid a roiling trade war between the US and China.

Merck said the expected tariff charge primarily reflects levies between the U.S. and China, but does not account for Trump's planned pharmaceutical tariffs.

The Dow, S&P 500 and Nasdaq Composite are making a run for the third straight day of gains as President Trump weighs taking a lighter approach to tariffs with China and potentially the automakers. On the earnings front,