The $4 trillion club is yet to be established, but there are three candidates with a realistic chance of becoming the founding member: Microsoft is the closest to the mark, and its business is also growing much faster than Apple's business, thanks primarily to the strength of its Azure cloud platform. Nvidia might be much further away from a$4 trillion valuation, but it could legitimately achieve the milestone before Microsoft and Apple because of how quickly its artificial intelligence (AI) chips for data ...