Even Tesla's biggest fans must agree that it's perverse that a decision to offer investors five times as many shares at one-fifth their previous value (five times one-fifth = 1) adds $50 billion to the company's value. That is what I estimate has been the increase in the company's market value between close of business on Wednesday, when the split was announced, and today. Nothing else of note happened in the meantime that might
TSLA was at higher market cap a month ago briefly - so historically splits in the US have been positive for share price (as mad as that may be) but don't think it is the only factor