U.S. stock indexes opened sharply lower Monday, under pressure after President Donald Trump over the weekend announced tariffs of 25% against Mexico and Canada, 10% on Canadian energy imports and an ...

Yields on shorter-term Treasurys were rising on Monday relative to what rates on longer-term maturities were doing — translating into a bear flattening of the yield curve, which is often negative for ...

Yahoo Finance will chronicle the latest news and updates on Trump's tariffs — from the threats to the eventual policy.