Major U.S. stock indexes just posted their steepest single-day drop in three months. The selloff wasn't random—it's all about the fresh tariff threats Washington just lobbed at Europe. When traditional markets get rattled like this, crypto traders better pay attention. These macro shocks tend to ripple across asset classes fast. The broader point? Trade policy uncertainty is back in focus, and markets hate uncertainty. Expect volatility to stick around until there's clarity on where these tariff negotiations actually land.