There is a growing number of risk measurement indices, although the definitions of these risk or uncertainty indices are not always clear. We can start with the VIX index, which is not really an uncertainty or risk index but a proxy for option volatility and is often called a fear index. There is a set of policies and economic indices, derived from news scraping, associated with countries and topic areas. Another entrant to this field is the risk aversion index.
The general estimation philosophy is as follows:
(1) The risk aversion coefficient is utility-based, reflecting the time-varying relative risk aversion coefficient of the representative agent in a generalized habit-like model with preference shocks.
(2) Given the no-arbitrage framework, asset prices, risk premiums, and physical/ risk-neutral variances are exact functions of the state variables, including risk aversion, in the dynamic (exponential) affine model.
(3) Financial variables are observable. Thus, the market-wide risk aversion should be spanned by a judiciously-chosen instrument set of asset prices and risk variables. We use the Generalized Method of Moments to estimate their optimal linear combination given asset moment restrictions that are consistent with the dynamic no-arbitrage asset pricing model. The instrument set includes a detrended earnings yield, corporate return spread (Baa-Aaa), term spread (10yr-3mth), equity return realized variance, corporate bond return realized variance, and equity risk-neutral variance.
I find this risk aversion index fits the story expected when there is higher uncertainty, and could be worth following as another indicator of changing behavior in financial markets.