Forward guidance is not a crystal ball: A case for rules-based monetary policy
Throughout history, the urge to predict the future has been hard to resist. The Federal Reserve is not immune to such temptation. In recent years, the Fed has used forward guidance, an explicit communication about the future path of interest rates, as a way to influence market behavior. In theory, such guidance reduces uncertainty. In practice, it depends on markets treating the Fed’s projections with the credibility once given to fortune tellers.
The role of forward guidance is likely to come under scrutiny in Kevin Warsh’s confirmation hearing for Fed Chair. Warsh has argued that forward guidance “has little role to play in normal times.” If the Fed is to move away from playing fortune teller, what should replace it?
Guiding the future before it arrives
The 2007-08 financial crisis forced the Federal Reserve into unfamiliar territory. With interest rates near zero and traditional monetary policy tools effectively exhausted, the central bank sought new ways to influence economic conditions. One such tool was forward guidance.
Forward guidance rests on a simple premise: long-term interest rates are largely determined by expectations of future short-term rates. The assumption is that by influencing those expectations, the Fed can affect borrowing costs, asset prices, and broader economic behavior, even when current rates are unchanged. What began as a crisis-era adaptation gradually became a routine feature of the Fed’s policy framework.
Why predictions make bad policy
The problem with forward guidance is not its intent, but its institutional design. It asks a discretionary central bank to communicate a future policy path without any mechanism that binds future policymakers to follow it.
That limitation is built into the Fed’s institutional design. Monetary policy is conducted under a dual mandate, which requires the Fed to balance price stability and maximum employment. That balance is judgment-based and must be reassessed as economic conditions change.
In that environment, forward guidance functions as a statement of current expectations. The Federal Open Market Committee can revise or reverse prior guidance at each meeting based on new data and do so without penalty. As a result, guidance reflects how policymakers think today, not what they are required to do in the future.
Forward guidance is a description of intent within a system designed to preserve flexibility. Markets may incorporate that information, but its value is contingent on future policy discretion. This helps explain why forward guidance has limited ability to influence expectations at long-term horizons, where uncertainty about future policy and economic conditions is greater than with short-term horizons.
Why rules should replace guesswork
Forward guidance asks markets to interpret discretionary projections about future interest rates. Rules-based monetary policy replaces that discretion with a consistent framework that governs how policy responds to economic conditions.
In a rules-based system, the Federal Reserve follows a predictable reaction function, adjusting interest rates so that markets can infer future policy from observable economic conditions. As the Mercatus Center’s Robert Hetzel highlights, a key advantage of this approach is that it improves predictability and accountability by reducing discretion and making policy behavior more systematic and transparent.
This structure makes forward guidance redundant. The “guidance” is embedded in the rule since consistent behavior over time communicates policy responses more clearly than shifting statements about future intentions.
Importantly, this framework does not require agreement on a single preferred rule, as the Cato Institute’s Norbert Michel and Jai Kedia note in their analysis on rules-based monetary policy. Although economists disagree about which rule is best, many standard rules produce similar policy behavior. Disagreement should not impede the Fed from adopting a rules-based approach.
From prediction to principle
Because forward guidance depends on discretionary judgments about inflation and employment, the Fed can shift its guidance as conditions change. That makes forward guidance less of a commitment and more of a snapshot of current thinking.
Markets recognize this. Credibility, as a result, rests less on communication itself and more on whether policy behavior remains consistent over time.
Rules-based monetary policy offers a different approach. Instead of asking markets to interpret changing projections, it establishes a stable framework for how policy responds to economic conditions. That consistency allows expectations to form around structure, not statements.
These issues are especially relevant in light of Kevin Warsh’s upcoming confirmation hearing. The issue is not whether the Federal Reserve should communicate, but how to make its communications credible.
To help clarify that distinction, CEI has published a policy memo for the hearing that includes questions examining Warsh’s views on the role of forward guidance and rules-based discipline in modern monetary policy.