We analyze a monetary quasi-experiment in Sweden from 2010–2011, when the Riksbank raised the interest rate substantially. We argue that this increase was unrelated to labor market conditions, driven instead by new concerns at the Riksbank about financial stability. Using a battery of specifications that rule out domestic or international confounders, we show that this monetary tightening led to a substantial economic contraction, raising unemployment by 1–2 percentage points. Using administrative micro data, we find that nominal wage rigidity drove much of the unemployment response and that the monetary contraction was more regressive than the typical business cycle.