U.S. stocks rose, but only after careening through another wild day. The S&P 500 climbed 0.6% Friday after erasing an earlier loss that reached 1.3%.

President Donald Trump's quickly changing policies on tariffs have roiled markets this week–and the most widely-followed gauge of market fear and uncertainty helps capture the sense of panic. The Cboe Volatility Index,

Stock splits not only make a company's stock more affordable, but can also cue investors in to competitively advantaged businesses. Last year, Super Micro Computer (NASDAQ: SMCI) and Arista Networks (NYSE: ANET) split their stocks to make shares accessible to more investors.