New monetary policy tools have lengthened the interval over which policy news is transmitted and processed.
[from the Federal Reserve Bank of Kansas City, 2 October 2025]
by Karlye Dilts Stedman, Amaze Lusompa & Phillip An
Disentangling how the economy responds to a monetary policy decision from its response to macroeconomic conditions at the time of the decision is an ongoing challenge. One popular method researchers use to measure the effect of a monetary policy announcement—high-frequency identification—analyzes the reaction of fast-moving financial variables immediately following the policy announcement, using a time window long enough for markets to respond but not so long that the response is contaminated by other information.
Since high-frequency identification was introduced in the early 2000s, policymakers have introduced tools such as forward guidance and large-scale asset purchases. Karlye Dilts Stedman, Amaze Lusompa, and Phillip An examine how the evolution of monetary policy has changed high-frequency identification and assess whether additional changes might be necessary to better capture the effect of modern monetary policy surprises. Although researchers have continually updated the asset mix used in high-frequency identification over time, they have not updated the measurement window. Because the timing of monetary policy communication has changed significantly in recent years, refining the length of this measurement window may be necessary going forward.
Read the full article [archived PDF].