For most of this year, the consensus trade was simple: sell the US dollar. Investors pointed to America’s twin deficits, mounting public debt, and the growing debate over de-dollarisation as evidence that the greenback had entered a long-term structural decline. The market is now discovering that structural trends rarely move in a straight line. Over the past few weeks, the dollar has staged an impressive recovery. A more hawkish Federal Reserve, resilient US economic data and widening interest-rate differentials have combined to push the currency sharply higher. A stronger dollar could become one of the most painful trades of the second half of the year, particularly if the Fed is forced to tighten policy further than markets currently anticipate.

The short-term case is certainly compelling. Inflation remains well above the Federal Reserve’s target. Consumer spending continues to surprise on the upside. The labour market remains remarkably resilient, while the massive investment cycle linked to artificial intelligence is supporting economic activity despite restrictive monetary policy. Instead of slowing, the US economy has once again demonstrated its extraordinary capacity to absorb higher borrowing costs. At the same time, Europe faces weaker growth, lower energy prices reduce inflationary pressures, and the ECB has considerably less room to remain restrictive. Japan, after decades of exporting deflation, is only beginning its monetary normalisation. The interest-rate advantage therefore remains firmly on the side of the United States. Markets are responding accordingly. Speculative positioning in favour of the dollar has reached its highest level in well over a year. The yen has fallen to levels not seen for four decades. The euro has surrendered much of its earlier gains. Investors who only a few months ago were expecting multiple Fed rate cuts are now debating whether further rate hikes may ultimately become necessary.

But investors should be careful not to confuse cyclical strength with structural dominance. The forces supporting the dollar today are largely monetary. Higher real yields, stronger relative growth and the Fed’s credibility naturally attract global capital. These are powerful drivers, but they are also reversible. Our longer-term view remains unchanged. The United States continues to finance historically large fiscal deficits. Treasury issuance is likely to remain at unprecedented levels for years. Servicing this debt will increasingly compete with productive public investment, while foreign investors will eventually demand a higher premium to absorb the growing supply of government bonds. Over time, these dynamics are difficult to reconcile with a permanently stronger dollar.

The dollar’s role as the world’s reserve currency is also evolving. There is no credible alternative capable of replacing it today, but diversification is already underway at the margin. Central banks continue to increase their gold reserves, regional trade agreements increasingly bypass the dollar, and reserve managers are gradually broadening their currency allocations. None of these trends threatens the dollar’s dominance in the near term, but collectively they point towards a more multipolar monetary system over the coming decade. This is precisely why timing matters.

It is entirely possible for the dollar to strengthen significantly over the next six to twelve months while remaining structurally vulnerable over a five-to ten-year horizon. Markets frequently overshoot in both directions, and periods of cyclical strength often occur within longer-term secular declines. The same reasoning applies to US Treasury markets. At the moment, investors have aggressively positioned for further curve flattening as short-term yields have risen sharply. Yet should the economy eventually weaken, those positions could unwind just as rapidly. Today’s consensus can become tomorrow’s crowded trade.

For investors, the message is straightforward. Do not underestimate the dollar’s ability to remain stronger for longer. Higher interest rates, resilient economic growth and persistent inflation continue to justify short-term dollar strength. Equally, do not extrapolate today’s cyclical rebound into a permanent structural bull market. The world is entering a new monetary regime in which interest-rate differentials, fiscal sustainability, and geopolitical fragmentation will coexist. The dollar will remain at the centre of the global financial system, but its long-term supremacy is unlikely to be as uncontested as it was during the era of ultra-low interest rates. The dollar is not dying. But neither is it invincible. The greatest investment mistake may be to believe either extreme.