Why the Bond Market Is Becoming More Volatile

 | Apr 12, 2023 19:46

Last month we looked at how stock market volatility ebbs and flowsHow Monitoring Volatility Regimes Helps Anticipate Key Market Pivots through time. Let’s pick up this thread and do the same for the bond market, based on the 10-year US Treasury yield.

As with equities, bonds go through periods of low vol, which gives way to vol spikes. But in comparison with stocks, the low-vol episodes are more erratic and less prone to long runs. The longest period of volatility for the 10-year Note since the early 1970s is a 1000-day-plus period in the early 1990s – roughly half as long as the longest run of relative calm for stocks.

Once again I’m defining volatility as the 30-day standard deviation (annualized) for the rolling one-year change, which in this case is the year-over-year change in the 10-year yield. That calculus is applied to rolling 10-year windows. Reviewing history on this basis reveals a striking fact: the bond market has become substantially more volatile lately, in absolute and relative terms.