Unexpectedly! Nvidia was suddenly hit by an air raid! Just as Nvidia was soaring all the way, a Wall Street analyst suddenly issued a warning that the rise in Nvidia's stock price hides huge risks and may plummet by 20% in the future. Gil Luria, an analyst at investment bank DA Davidson, said that Nvidia's performance growth trend will be shaken, and its stock price will experience a double-digit drop in the next 18 months. Not long ago, legendary investor Rob Arnott, chairman of Research Associates, a quantitative investment institution, also warned that Nvidia's stock looked more like a foam. So, does Nvidia have a foam? How big is the foam? In fact, looking back at the violent rise in Nvidia's stock price this round is supported by performance. The main concern for bearish institutions on Wall Street is whether Nvidia's explosive performance can continue to be sustained, as slowing down performance growth poses a huge risk.