ASML's stock is hovering around $1,000 per share. Stock splits are back in vogue. After several years with hardly any stock splits on the market, big companies now seem to be eager to reverse course. Nvidia (NVDA -0.09%), for example, just became the fifth of the "Magnificent Seven" stocks to split its shares in less than four years, announcing a 10-for-1 stock split that's set to go into effect on June 7. Nvidia shares are up roughly 20% since the announcement, benefiting from a strong earnings report, and ...