Alibaba Group Holding Ltd‘s (NYSE: BABA) (NYSE: BABAF) stealth AI expansion may be Wall Street's blind spot—but it's Nvidia Corp's (NASDAQ: NVDA) margin moat that's directly in the crosshairs. CEO Eddie Wu has pledged to surpass the company's $53 billion AI investment as demand for compute skyrockets, setting up a clash that could echo Beijing's solar strategy a decade ago: flooding the market with cheaper supply, undercutting Western rivals, and rewriting the margin math.Track NVDA stock here.Nvidia's Moat ...