The S&P 500 rose to a fresh record as artificial intelligence darling Nvidia continued its march to new highs, topping Microsoft as the most valuable public company.The Dow Jones Industrials advanced 56.76 points to 38,834.86.The much-broader index gained 13.80 points to 5,487.03.The NASDAQ inched up 5.21 points, to 17,862.23.Nvidia jumped 3.5% to surpass Microsoft as the most valuable public company, and continue its milestone run after topping a $3 trillion market cap and breezing past Apple in value earlier this month. The chipmaker has surged 174% since the start of the year as enthusiasm…