The 2013 Taper Tantrum

By 2013, the Fed had been buying large quantities of Treasury and mortgage bonds for years under quantitative easing, a program that had helped push down long-term interest rates and pushed investors into riskier, higher-yielding assets in search of return — including, in large volume, emerging-market bonds and currencies. In May 2013, Fed Chair Ben Bernanke, testifying to Congress, mentioned that the Fed could begin slowing — "tapering" — its bond purchases in the coming months if the economy kept improving.

Nothing was actually announced. No purchases were reduced that day, and Bernanke's comment was, on its face, a fairly mild statement about a possible future path conditional on the data. Markets reacted as though tightening had already begun. The 10-year Treasury yield rose sharply within weeks, and money that had flowed into higher-yielding emerging markets during years of easy Fed policy reversed just as sharply — investors, anticipating that U.S. yields would soon become more competitive again, pulled capital out of EM bonds and currencies in a hurry.

The countries hit hardest — India, Indonesia, Brazil, Turkey, and South Africa, nicknamed the "Fragile Five" — shared a common vulnerability: current account deficits that made them reliant on continued foreign capital inflows to fund themselves. When that capital reversed abruptly, their currencies fell sharply and their central banks were forced into painful rate hikes simply to stem the outflow, even though nothing in their own domestic economies had actually changed — the shock originated entirely from a change in expectations about U.S. policy.

The episode became a case study in how sensitive globally connected markets had become to changes in the expected pace of central bank stimulus, not just to actual policy changes. It taught the Fed a durable lesson about communication: subsequent tapering announcements (in 2014 and again in 2021-22) were telegraphed far more gradually and explicitly, specifically to avoid triggering the same kind of abrupt repricing.

For anyone trading rates or EM assets, the taper tantrum is the standing reminder that capital flows chasing yield can reverse just as fast as they arrived, and that countries relying on continued foreign inflows to fund a current account deficit carry a specific, identifiable vulnerability to shifts in developed-market monetary policy expectations.