Alibaba stock has been on a sharp downtrend since November even as the former China leader continues to deliver strong earnings and sales growth. Increased regulatory scrutiny has weighed on Alibaba stock and other Chinese stocks in recent months, and BABA stock has fallen more than 50% off its high. Alibaba (BABA) is making a case for a bottom, but is Alibaba stock a buy now? X Alibaba recently said it will invest $15.5 billion in support of President Xi Jinping’s “common prosperity” initiative, which encourages large China-based companies to share the wealth to ease inequality in the world’s second…