Dollar weakens as ECB signals caution, U.S. GDP disappoints

The dollar stumbled on Thursday as currency traders absorbed a trio of signals pointing in the same direction: central banks were losing patience with pandemic-era stimulus, American economic growth was slowing, and the calculus of interest rates was shifting beneath the market's feet.

By late afternoon in New York, the euro had climbed nearly 0.7 percent to $1.1681, putting it on track for its largest single-day gain since May. Sterling rose 0.4 percent to $1.3788. The dollar index, which measures the currency against a basket of major peers, fell 0.6 percent to 93.3580. These were not dramatic swings by historical standards, but they reflected a market in motion, reassessing where money should flow.

The immediate triggers were specific and layered. The U.S. government reported that gross domestic product had expanded at just a 2 percent annualized rate in the third quarter—a disappointment against economist forecasts of 2.7 percent. More consequential, perhaps, was what European Central Bank President Christine Lagarde said during a Thursday press conference. Markets had positioned themselves for a forceful reaffirmation of the ECB's commitment to keeping interest rates low and continuing bond purchases. Instead, traders read her comments as softer than expected on that front. Economists at Rabobank noted that Lagarde had "failed to give enough pushback against market expectations of rate hikes next year." The gap between what the market wanted to hear and what it actually heard moved currency prices.

This volatility was not confined to the dollar-euro pair. Earlier in the week, the Bank of Canada had signaled a more aggressive stance on inflation. On Thursday, the Reserve Bank of Australia declined to purchase government bonds as part of its stimulus program—a move that suggested rate increases might come sooner than previously expected. The Australian dollar initially fell 0.5 percent on the news but recovered to finish up 0.3 percent. Next week would bring decisions from the U.S. Federal Reserve and the Bank of England, both of which traders were watching intently for signs of tightening.

Mazen Issa, a senior currency strategist at TD Securities, described the market's state of mind plainly: traders were "very much triggered and sensitive to inflation worries and this notion that central banks are behind the curve." The foreign exchange market had become a live referendum on which central bank would move first and how aggressively. As pandemic-era monetary policies began to unwind, investors were trying to predict not just interest rate direction but the real, inflation-adjusted returns they would earn in different currencies. Yield curves were flattening—a signal that markets feared central banks would have to choose between supporting economic recovery and fighting inflation, and that inflation would win.

There was a mechanical element to the volatility as well. Month-end was approaching, and investment managers were rebalancing their currency holdings. That seasonal flow, combined with the genuine uncertainty about central bank intentions, had amplified price swings. The pound, despite gaining against the dollar, actually slipped 0.3 percent against the euro as traders hedged their bets on whether the Bank of England would raise rates at its meeting the following week.

The dollar's weakness was not a collapse—it was a recalibration. For months, the currency had benefited from the assumption that the Federal Reserve would raise rates before other major central banks. That assumption was now in question. If the ECB, the Bank of England, and the Reserve Bank of Australia all moved to tighten policy, the dollar's interest rate advantage would narrow. Traders were positioning accordingly, and the market's sensitivity to any hint of central bank messaging had become acute. The coming week would test whether that sensitivity was justified.