The S&P 500 notched a record-high close on Thursday, fueled by advances in Sandisk and other heavyweight technology stocks, as tame producer price inflation data supported expectations the Federal Reserve will not raise interest rates at its September meeting.Memory ?chip makers Sandisk ?and Micron ?Technology surged, while Broadcom and Meta Platforms also gained.Strong forecasts in recent weeks from companies including Microsoft and Amazon have reduced investors' concerns about massive spending on AI data centers."The AI earnings-driven tech boom ?continues," said Jay Hatfield, CEO of Infrastructure Capital Advisors in New York. "It's an earnings boom, not a bubble."According to preliminary data,…