Nvidia shares' 9% recovery Tuesday was the second-best day in terms of market cap added for any company ever, trailing only a record it set in July.

One of the biggest beneficiaries of this trend is Nvidia (NASDAQ: NVDA), which pioneered the graphics processing units (GPUs) that have become the gold standard for running AI systems. However, reports emerged recently that suggested a Chinese start-up had cracked the code for developing strong AI systems while using inferior chips and novel training processes.