WTF, WFT?

Help, I don't understand. Couple of days after Trump's election win in early November 2016, WFT-T was trading after a 6.6% election dip at $43.72 (from $46.79).

Today, after the Trump admin imposed a 24% tariff on WFT, WFT rose almost 9%, even after climbing 28.9% since Trump's election win. The explanation given in this article is that the tariff was much less than expected, implying that WTF's stock price at yesterday's close ($56.36, again, up 28.9% since Trump's election win) was already priced in, hence today's jump.

Please, someone, anyone, maybe even the good Mr. Berman himself, please add a little more detail to explain why a company hit with a tariff sees its stock *rise* 9% after already having gained very nicely.