The monetary onslaught appears a reaction to financial factors — falling equity markets, rising credit spreads, increased volatility — and a perceived weakening of economic activity, primarily in Europe and China. If they heeded Walter Bagehot’s oft-cited rule, central banks would act only as lenders of last resort in times of financial crisis, lending without limit to solvent firms against good collateral at high rates. Instead, they’ve become lenders of first resort, expected to step in at any sign of problems. U.S. central bankers are currently debating whether quantitative-easing programs should be used purely in emergency situations or more routinely.
