UK long-term yields are extraordinarily low. This could be interpreted as financial markets expecting prolonged low growth or low inflation, or both. This column argues that this view is overly gloomy. Factors pulling down today’s inflation are unlikely to be permanent, and the economic headwinds should ease gradually. Additionally, a return to productivity growth should facilitate faster potential output growth over the long term. A more likely interpretation is that low yields reflect precautionary actions by public and private financial-market participants to reduce vulnerabilities to adverse outcomes.