The day Nvidia lost its founder
Jensen Huang co-founded Nvidia in 1993 and ran it for 33 years, building it into one of the most valuable companies in the world. On Sunday the board opened an investigation into reports that he'd been targeted by a foreign intelligence service, and said it had confidence in him. By Thursday he'd resigned, and the board was left running a company that had been built around one man.
The shares opened about 13% lower. By the close they'd clawed most of that back and finished down 4.34%. Sell at the opening price and you got about 9% less for your shares than someone who sat on their hands until the end of the day. Meanwhile AMD rose 5.86% and Broadcom 5.55%, as traders bet that Nvidia's customers would spread their orders around. A global index fund owns all three, along with thousands of other companies.
Founders have left before
Steve Jobs resigned as Apple's chief executive on 24 August 2011. Apple's shares fell 0.65% the next day. Over the following ten years, with dividends reinvested, they returned about 1,200%, against 367% for the S&P 500.
Bill Gates handed the chief executive's job at Microsoft to Steve Ballmer on 13 January 2000. Ten years later Microsoft's shares, with dividends, were down about 31%, while the S&P 500 was down about 5%. The dot-com crash started weeks after he stepped back, which explains a lot of that, and after March 2000 the share price didn't close above its level on the day he went until October 2015.
On the day each founder left, both companies were giants with a product nearly everyone used. One went on to return about 1,200% in a decade and the other took 15 years to get its share price back. An index fund owned both.
What the fear gauge has said before
Since 1990 the VIX has closed at 28 or higher on about one trading day in ten. Those are the days when selling feels most sensible.
Over the 12 months after those days, the S&P 500 with dividends rose by about 21.7% on average and was higher about 85% of the time. Across all trading days the average was about 12.4%, and higher about 83% of the time. That's about nine points a year better than average.
Those averages hide some big exceptions. About one in five of those high-fear days came between September 2008 and June 2009, and anyone buying in the autumn of 2008 sat through months of further falls. A high VIX won't tell you when the bottom arrives, and by the time it's up, prices have usually fallen already, so selling then means selling cheap.