Stocks Slump as Trump Tariffs Take Effect

The S&P 500 added to recent losses in early trading. German automakers, many of which have plants in Mexico that make vehicles that are sold in the United States, were especially hard hit.

Biden Administration Adopts Rules to Guide A.I.’s Global Spread

New rules aim to keep advanced technology out of China and to ensure that cutting-edge artificial intelligence is developed by the United States and its allies.

Despite Blocked US Steel Bid, Japan Won’t Stop Seeking American Deals

Japanese companies needing to grow have sought out American deals. Experts say that will not change even after Biden’s rejection of Nippon Steel’s takeover attempt.