There’s an AP article out today titled, “Wall Street Braces for More Volatility“. The subtitle is: “This Week Brings Wall Street More Earnings, but It Could Be Months Before Volatility Subsides.” Given that it’s the Associated Press, it’s not fair to expect any sparkling VIX or options commentary, but still, it’s weird that the word “volatility” doesn’t appear in the body of the article - only in those titles. Rather, the rest of the piece is about the recent selling, the possibility of bad earnings over the coming weeks, and recession.
But what do any of those macroeconomic stories have to do with volatility? Well, nothing, necessarily. People seem to be equating “volatility” with “selling”. But that’s not quite right. Volatility is:
1. A statistical measure of the dispersion of returns for a given security or market index. Volatility can either be measured by using the standard deviation or variance between returns from that same security or market index. Commonly, the higher the volatility, the riskier the security.
…In other words, volatility refers to the amount of uncertainty or risk about the size of changes in a security’s value. A higher volatility means that a security’s value can potentially be spread out over a larger range of values. This means that the price of the security can change dramatically over a short time period in either direction. A lower volatility means that a security’s value does not fluctuate dramatically, but changes in value at a steady pace over a period of time. [Investopedia]
So when an underlying stock or index goes straight up, it’s not volatile. And when it goes straight down (like the major indexes have done so far this year), that’s not volatility. That’s just selling. On the general definition, you’ve got to actually have some movement in more than one direction before you can call it volatility. Normally, any serious selling is accompanied by a VIX spike - that’s what forms this selling=volatility notion in people’s minds - and the reason for that VIX spike is typically increased put buying. But if the VIX doesn’t rise and markets don’t bounce around (but instead just go straight up or down), there’s no relevant sense in which you can use the v-word.