U.S. stocks fall as OpenAI pause and bond rout hit markets

U.S. stocks ended lower Monday as OpenAI's training halt intensified concerns about the AI trade, while a continued bond rout pressured markets. The decline follows a slide in Asian chip stocks, with the OpenAI pause reviving fears of an AI slowdown. Meanwhile, gold fell 4% below $4,200 amid a firmer dollar and rising Fed hike bets. These moves come as bond yields surge, impacting stocks, gold, and the dollar, with Fed Chair Warsh offering a fresh perspective on the economic outlook.