Nvidia shares look set to close out June with a gain of around 16%, nearly four times that of the S&P 500, taking the world’s most important tech company closer to a valuation that could soon top $4 trillion. Nvidia crossed the $1 trillion mark in June 2023, shortly after it effectively fired the starting gun on a race to benefit from demand linked to artificial intelligence with a revenue forecast for its powerful chips that obliterated Wall Street forecasts. The AI chipmaker, in fact, could reach that threshold in just a few weeks, given the stock’s daily average gain of around 0.8% over the past month, based on data from FactSet Gains that size would lift Nvidia’s current value past the $4 trillion mark in just five trading days...