4. Dollar hegemony is broadly sustainable in the status quo

Over the course of half a century, the dollar’s reserve currency role was strongest in the years following the collapse of the Bretton Woods dollar standard when President Nixon abandoned the promise to convert dollar reserves into gold—the 1971 Nixon shock. Regardless of which measure of dominance is used—polarity or systemic concentration—the dollar is significantly lower today than it was in 1973. However, the dollar’s reserve currency role is stronger than it was in 1990 when the Cold War ended. In a fifty-year perspective, the dollar reached a low point at that time, a period otherwise considered to mark the onset of America’s unipolar moment. Clearly, the level of reserve currency holdings in a single year, or within a limited time frame, is not a good predictor of US ascendancy or decline in any broader sense. Point estimates of reserve currency holdings are not a good predictor of dollar dominance either. That is because the liquidity creating role, assumed by the issuer of the first international currency, requires adjustment of expansionary policies, resulting in cycles of trade deficits when demand for dollar assets is typically high and deficit adjustment when dollar demand tends to fall. Depending on the measure used to assess dollar dominance, the most recent downward dollar cycle began in 2016 (polarity) or 2017 (concentration). According to both measures, an upward cycle began in 2020 and stabilized despite the 2022 sanctions against Russia.