Finally, don't discount legal challenges to the president's tariffs. An argument could be made that pharmaceutical products made in Ireland, the primary overseas source for Lilly, don't present a national security threat to the U.S., since Ireland is a staunch ally.

President Donald Trump is keeping up the pace with seemingly a new tariff development every day. This time, he flagged that levies are coming on pharmaceuticals as soon as the end of the month and semiconductors could be next.

Trump pharma and chip tariffs may start this month, sparking price hikes, inflation, and global trade ripples.