The underground market in China selling Nvidia's A100 AI chips at double the price indicates a demand for the product despite the embargo. However, it is unclear how this will impact Nvidia's stock price in the short term, as the company does not allow exports of A100 or H100 chips to China. The US is likely to be indifferent to small transactions of the chips, and the premiums charged by Chinese vendors could collapse as many Chinese AI startups driving purchases may eventually withdraw from the market.