Semiconductor giant Nvidia (NASDAQ:NVDA) saw its equity value slip about 4% on Friday amid a broader market selloff. Heaping on the pressure is global hedge fund Elliott Management, which is warning investors that the tech firm appears to be in “bubble land.” Primarily, Nvidia stock may suffer due to an inability to efficiently extract productivity returns from artificial intelligence (AI).According to Investing, the hedge fund told investors — in a letter that the Financial Times reviewed — that “overhyped ...