SoftBank Group Corp.’s plan to invest $100 billion in U.S. artificial intelligence infrastructure has slowed and financing talks have been hampered by economic risks from Washington’s tariffs. Preliminary talks with lenders and investors have begun, but no deals have been reached as financiers reassess data center projects amid rising economic volatility and lower prices for artificial intelligence services. SoftBank is building a team to focus on the Stargate project and is approaching banks and bond investors, but uncertainty over tariff discussions, concerns about overcapacity and turmoil at OpenAI has weighed on negotiations.