Has Stock Market Exuberance Become Irrational?

The second quarter is winding down and what a quarter it has been with the S&P 500 up 12.6% quarter to date, while the Nasdaq-100 and Russell 2000 are both up over 20%. Despite some twists and turns, the path of least resistance for stocks broadly remained up and to the right for much of the last three months. The powerful rally and the blockbuster initial public offering (IPO) of Elon Musk’s SpaceX (SPCX) have sparked the question whether market optimism has become excessive. To quote the thirteenth Chair of the Federal Reserve, Alan Greenspan, who passed away just one week ago and in 1996 famously asked: “How do we know when irrational exuberance has unduly escalated asset values, which then become subject to unexpected and prolonged contractions?” While we do not think the stock market is in a dot-com-style bubble, the Maestro’s question is a fair one. Here, we dive into some sentiment and positioning indicators to assess the exuberance.