Wall Street opened just short of fresh records on Wednesday as Nvidia hits a $5 trillion valuation, while investors awaited an expected Federal Reserve rate cut and a wave of Big Tech results.At 09:31 a.m., the Dow Jones Industrial Average rose 103.21 points, or 0.25%, to 47,809.58, the S&P 500 gained 16.90 points, or 0.24%, to 6,907.66 and the Nasdaq Composite gained 157.50 points, or 0.66%, to 23,984.99.