A stock split makes a stock more accessible to a wider range of investors.The past few years have been big for stock splits, with giants from Nvidia to Chipotle Mexican Grill completing such operations. Companies usually launch these after major gains have driven the price to high levels -- a stock split brings down the per-share price, making it easier for many more investors to get in on the investing opportunity.Though a stock split, in and of itself, isn't a reason to buy a particular player, investors ...