Faced with a stagflationary shock, the Federal Reserve is on hold. Its next move will be dictated by inflation *expectations*, measured by the 5-year breakeven rate. If expectations remain anchored, the Fed can focus on growth; if they rise, aggressive rate hikes will follow.

The Fed's concern isn't just the current high inflation rate, but the risk that prolonged high inflation changes public psychology. If businesses and consumers begin to expect continued price hikes, they may become less price-sensitive, creating a self-reinforcing 'snowball' effect that makes inflation much harder to control.

Altering the Fed's inflation target when it has consistently missed the current one is politically and economically risky. It could erode credibility, un-anchor market inflation expectations, raise long-term yields, and attract sharp criticism from Congress.

Bond markets are not pricing in higher long-term inflation; expectations remain anchored near the Fed's 2% target. However, the uncertainty around future inflation has widened significantly due to shocks and policy shifts. This increased risk of volatility drives the higher "term premium" demanded by investors.

By choosing inaction over rate hikes or hawkish communication, the Fed is betting that inflation will moderate on its own in the near future. If this gamble fails and inflation remains high, the Fed will face a significant credibility challenge and be forced to take more aggressive action later.

Drawing on lessons from the 2008 financial crisis and recent inflation, Austan Goolsbee shares Paul Volcker's advice that a policymaker's most valuable asset is credibility. Maintaining trust by sticking to facts and avoiding speculative promises is crucial for navigating economic turmoil and makes the job easier.

The Federal Reserve can tolerate inflation running above its 2% target as long as long-term inflation expectations remain anchored. This is the critical variable that gives them policy flexibility. The market's belief in the Fed's long-term credibility is what matters most.

Central bank credibility is a finite resource. By not fully stamping out inflation to its 2% target, the Fed depletes its credibility, making the next inflationary shock harder and more costly to control—a lesson from the recurring inflation of the 1980s.

Even as recent inflation surged, market expectations for inflation five years out remained stable at the Fed's 2% target. This demonstrates the power of the Fed's credibility. If the market loses faith, it can trigger a self-fulfilling wage-price spiral, making it much more painful for the central bank to rein in inflation.