Finally, I would like to know about the dynamic properties of the new FCI. Are particularly high (expansive) readings dangerous and should they be taken as suggestive of asset bubbles? Should the Federal Reserve try to prevent such occurrences because loose financial conditions precede episodes of financial instability? In this respect, when financial conditions become unusually expansive, is the fed funds rate the right tool to use to constrain or counteract such expansiveness? Or would it be better to use macroprudential tools such as leverage limits or loan-to-value requirements on residential real estate to keep financial conditions from becoming unusually expansive in the first place? I could imagine circumstances in which macroprudential tools might be used to tighten up the relationship between the fed funds rate and financial conditions. Would the use of such tools be helpful in achieving greater macroeconomic stability? At this stage, there are many more questions than answers. I would strongly encourage the authors and others to continue their work on financial conditions and in exploring how developments in the financial sector influence both the real economy and monetary policy. The financial crisis has demonstrated that financial market developments matter greatly. The paper successfully makes the case that it would be useful to have a good set of summary statistics to serve as benchmarks to keep track of such developments. It also would be useful to have a better understanding of how shifts in financial conditions should be considered in the ongoing conduct of monetary policy.
There are a number of reasons that a financial conditions framework is likely to be useful when evaluating the economic outlook and the conduct of monetary policy. Most important, monetary policy works its magic through its effect on financial conditions; it does not operate directly on real economic variables. That is because the level of the federal funds rate influences other financial market variables such as money market rates, long-term interest rates, credit spreads, stock prices and the value of the dollar, and it is these variables that influence real economic activity. 1 This means that if the linkage between the fed funds rate and this broader constellation of financial indicators is not stable or completely predictable, then knowing what is happening to the fed funds rate is not sufficient to predict economic activity. The instability of the linkage between the fed funds rate and financial conditions indicators means that these indicators provide additional information about real activity and also are relevant in deciding the appropriate fed funds rate target. In contrast, if the transmission mechanism from the fed funds rate to financial conditions and onward to real economic activity were completely predictable, then there would be no need to focus on financial conditions as an intermediate target variable. The level and path of the fed funds rate matters, but it also matters how this gets transmitted to the real economy through the financial sector.