Nvidia's 54 percent plunge this quarter makes it the biggest loser in S&P 500 By: CNBC.com News December 21, 2018 at 16:05 PM EST Nvidia's value has been cut in half this quarter, amid a broad market sell-off and concerns surrounding excess inventory Read More >> Related Stocks: Adv Micro Devices Alphabet-A Amazon.com Micron Technology NVIDIA Corp