Stock Splits Are Back. So Is the Debate Over Whether They Matter (Bloomberg) -- Stock splits are back in vogue among big U.S. companies, reviving a debate about whether the practice that had fallen out of favor for years is worth the fuss.Last week, Nvidia Corp. became the eighth company in the SP 500 Index to announce a split in the past year, joining big names like Apple Inc. and Tesla Inc. That’s the most over a comparable period in six years, according to data compiled by Bloomberg.The surge in splits comes amid a rally that’s pushed share prices of almost 600 stocks in the Russell 3000 Index above $100. Yet that has done little to settle the age-old-argument among investors about whether such stock-price engineering has any bearing on performance. In fact, recent developments such as soaring retail trading and fractional share ownership have only heated things up.“Arithmetically, there’s no merit to the notion that stock splits work,” said Mark Lehmann, chief executive officer of JMP Securities LLC. “But there is an optical hesitancy for certain stocks at certain prices and there is a segment of the investing public where that will never change.”The primary motivation cited by companies doing splits is simple: to make each share cheaper to buy.