The Dollar Holds Firm, the Euro Hits a Ceiling, and Bonds Set the Tempo

Currency markets are moving through a phase where the dollar, the euro, and the bond market shape one another in a delicate balance that every trader must learn to decode. The greenback is proving more resilient than recent economic data would suggest, the euro is struggling to advance despite favorable surprises, and long-term US Treasury yields are playing a central role in steering the whole picture. For a trader looking to deepen their grasp of fundamental analysis, this setup is a textbook case of how bond yields, energy, and monetary policy expectations combine to shape the relative value of currencies.

The dollar is refusing to yield to downside pressure for now, and this resistance deserves to be broken down. The dollar index has bounced from its range lows around 99.40, showing that the greenback is not yet ready to begin a lasting decline. Two factors are giving it short-term support: rising energy prices and a rebound in 30-year Treasury yields. If these two elements persist, they could put a September Federal Reserve rate hike back on the table. The now-particular link between energy and the dollar must be understood. With the United States now an energy exporter, higher oil and gas prices benefit it economically, which supports the dollar. On top of this comes the central bank's reaction function, as higher energy prices revive inflation fears and therefore tightening expectations, which strengthens the greenback further.

The geopolitical dimension feeds directly into this energy pressure. Signs that Washington seems little interested in extending the 60-day ceasefire with Iran pushed oil and gas prices higher as the fragile truce reached its end. The direction of the next major move in energy prices remains unpredictable, but more expensive energy works in the dollar's favor. This point is decisive for a trader trading euro against dollar, because the pair depends not only on the relative strength of the two economies, but also on an external factor like oil, which structurally advantages one of the two currencies.

The behavior of long-term US bonds is the core of this article and requires an in-depth explanation, because it illustrates several fundamental mechanisms at once. US Treasuries remain under pressure, particularly on longer maturities. The move happens through slow grinding, but the net direction stays oriented toward higher yields. Here the two ends of the yield curve must be distinguished, because they tell different stories. Short yields have moved lower in response to weaker economic data, which is logical since they primarily reflect expectations for short-term policy rates. Long yields, by contrast, obey other forces. Usually, when the 10-year yield exceeds 4.65%, the US administration tempers the move with reassuring remarks, often centered on an imminent resolution of the conflict with Iran. This time, those reassurances are slow to come, with the truce having expired without prospect of a quick settlement, which points to persistent upward pressure on energy and therefore on yields.

The origin of this rise in long yields deserves careful analysis, because it helps rule out a mistaken interpretation. The fact that the spreads between 30-year bond yields and associated swap rates have not widened suggests that budgetary concerns are not driving the move. The most convincing explanation lies in the abundance of bond issuance by technology giants. US investment-grade corporate bond issuance reached a record for an August month at 145 billion dollars. This mechanism is instructive for a trader: when many companies issue debt heavily, the supply of bonds on the market rises, which pushes yields up to attract buyers. A sharp rise in long-term yields is generally bad news for emerging-market currencies and for risk appetite in general, even if that critical threshold has not yet been reached. A continuation of this rise could nonetheless intensify pressure on the central bank to act, with the probability of a September hike having recently risen from 7 to 9 basis points.

An essential nuance about the nature of this rise further enriches the picture. The most pronounced move of recent weeks concerns real yields, meaning those adjusted for expected inflation. This increase does not stem solely from issuance-related pressure, but corresponds above all to a return of real yields toward more reasonable levels, comparable to those seen before the exceptional periods of the great financial crisis and the pandemic that had crushed them to the floor. In other words, current real yields represent only a return to normal rather than an anomaly. This distinction is crucial, because a higher real yield strengthens a currency's appeal by increasing the real return offered to capital, which helps explain the dollar's resistance.

International capital flows provide a complementary light on the greenback's underlying strength. The latest data revealed net sales of 72 billion dollars of US Treasuries by foreign investors in June, with Japan, China, and certain custodial centers among the net sellers, while Canada, Belgium, and Switzerland were buyers. These figures are volatile, however, with net sales of 56 billion over three months but net purchases of 205 billion over twelve months. Above all, net foreign capital inflows into the United States remain solid when equities are included, at 173 billion dollars for the month of June alone. This point is essential, because it shows that despite debates over a possible disaffection with US assets, capital keeps flowing in, notably toward equities driven by the artificial intelligence theme, which structurally supports the dollar and qualifies the notion of a broad sell-off in US debt.

Faced with this resilient dollar, the euro has its own strengths but struggles to assert them, which explains its ceiling. The euro-against-dollar rebound ran out of steam just above 1.16, with investors reluctant to push it higher given the trajectory of energy prices and while awaiting the US central bank minutes. Despite positive economic surprises in the euro zone, the fact that natural gas prices sit near their highs of the year justifies a degree of caution. The single currency nonetheless benefits from increasingly firm expectations regarding the European Central Bank. High energy prices indeed reinforce expectations of a quarter-point rate hike in September and keep alive the prospect of a further increase by the start of the following year. This mechanism may seem paradoxical, since high energy prices hurt the import-dependent European economy, but they fuel inflation and therefore push the central bank toward tightening, which supports the euro through the rate channel. This ambivalence of energy is fundamental to grasp: it favors the dollar through the US exporter status, while favoring the euro through its effect on European monetary policy, which helps freeze the pair in a narrow range.

The liquidity context in the euro-zone banking system adds a technical dimension that shapes financial conditions in depth. As the European Central Bank lets its bond portfolios mature without renewing them, excess reserves in the banking system have fallen to 2,160 billion euros, down around 300 billion over the year alone. This tightening feeds through to funding spreads, with the unsecured overnight rate reaching its widest level relative to the central bank's deposit rate since the first half of 2021. The stake must be understood: a reduction in available liquidity gradually raises the cost of funding for banks, which tightens monetary conditions indirectly, complementing rate decisions. Conditions remain broadly abundant, but this contraction is expected to continue, gradually pushing secured funding rates closer to the central bank's main refinancing rate, which is an additional supporting factor for the euro over the medium term.

The overall reading a trader can draw comes down to the notion of a balance of forces, in which the bond market plays the role of arbiter. The euro is caught between favorable economic surprises and expectations of tightening from its central bank on one side, and a dollar supported by energy, the rise in real yields, and robust capital flows on the other. This configuration explains why the euro-against-dollar pair stays confined to a narrow range, unable to decide as long as none of these factors clearly takes the upper hand. Oil appears as the pivot variable, capable of tipping the balance depending on how the Middle East conflict evolves, while the path of long-term US yields will determine whether pressure on the central bank intensifies to the point of reviving a September hike. As long as these yields continue their ascent, the dollar retains support that makes any expectation of a lasting decline premature, placing the euro in a holding pattern where each inflation release and each bond signal redefines the balance of power between the two currencies.