Warning signals in the U.S. debt market: war, geopolitical uncertainties, and financial system vulnerabilities

I. Current Treasury Market Dynamics: Rapid Rise in Yields and Increased Volatility

In late March 2026, the U.S. Treasury market showed significant signs of pressure. The 10-year Treasury yield rose to 4.44%, an increase of about 0.40 percentage points since the beginning of the month; the 2-year Treasury yield hovered around 3.92%, with a cumulative increase this month approaching historical high levels. This trend is similar to the worst performance since September 2022, reflecting a fundamental adjustment in investors’ pricing of U.S. government debt. The rise in yields is not an isolated event but is accompanied by a simultaneous surge in volatility. The ICE BofAML MOVE Index (which measures implied volatility in Treasury options) has climbed to around 112, far exceeding historical normal levels, indicating a sharp increase in market uncertainty regarding the path of interest rates.

This dual pressure (rising yields and amplified volatility) often historically signals broader market tensions. Unlike previous volatility triggered by banking crises or real estate bubbles, the core driving factor this time is the geopolitical conflict in the Middle East. The conflict has directly pushed up energy costs, reshaping inflation expectations and diminishing the appeal of bonds as “safe-haven assets.” Investors are demanding higher premiums to compensate for the newly added risks, which is a direct reflection of the current steepening of the yield curve.

II. Weak Performance in Treasury Auctions: Insufficient Demand Highlights Confidence Loss

Recent Treasury auction results further confirm market concerns. The demand for the 2-year Treasury auction in late March was exceptionally weak, with the bid-to-cover ratio falling below expectations, and the winning yield exceeding pre-auction trading levels, marking the highest in several months. This starkly contrasts with the strong demand seen in auctions a few months ago. Weak demand has pressured Treasury prices, passively pushing yields higher. Analysis indicates that such weak auction performance often stems from both foreign investors and domestic institutions reducing their holdings, partly due to expectations of an expanding fiscal deficit combined with geopolitical risks.

From a broader perspective, the approximately $30 trillion U.S. Treasury market is the cornerstone of the global financial system. Poor auction results not only reflect short-term sentiment but also echo long-term concerns about fiscal sustainability. The erratic policies of the Trump administration (such as tariff adjustments and military actions) have exacerbated uncertainty, undermining global trust in U.S. financial governance. Investors no longer view Treasuries as an absolute safe haven, but rather begin to assess the sovereign credit risk premium.

III. Significant Deterioration in Liquidity: Market Depth Decline Leads to Pricing Difficulties

Liquidity issues have become the most pressing concern in the current Treasury market. Market depth (the volume of orders that can be traded without significantly moving prices) has decreased by 40%-50% compared to recent averages, with even sharper declines in derivatives markets like Treasury futures. Some major Wall Street banks temporarily closed their automated trading systems, relying instead on manual pricing, which is extremely rare in the world’s most important financial markets.

The exhaustion of liquidity and volatility reinforce each other, creating a vicious cycle. In a high-volatility environment, dealers are less willing to make markets, further amplifying price swings. Historical data shows that similar liquidity contractions occurred in March 2020 at the onset of the pandemic or during the 2023 banking crisis, but the trigger this time is geopolitical rather than domestic events. The deterioration in liquidity not only raises trading costs but also undermines the pricing function of Treasuries as a benchmark asset, which then transmits to mortgage loans, corporate bonds, and foreign exchange markets.

IV. Geopolitical Shocks: Middle Eastern Conflicts Drive Up Oil Prices and Inflation Pressures

The root of the pressure in the Treasury market points directly to the U.S.-Israeli military actions against Iran that broke out in early 2026. The conflict has sharply increased the risk of oil supply disruptions, with Brent crude prices rising over 53% since the end of February, and WTI crude increasing by 45%, reaching around $112 and $99 per barrel, respectively. The surging energy prices directly elevate inflation expectations, with the OECD warning that overall inflation in the U.S. could reach 4.2% in 2026.

As a core driver of inflation, persistently high oil prices will force the Federal Reserve to reassess its policy path. The market’s previous expectations for multiple rate cuts have largely collapsed, replaced by pricing for “higher for longer” rates. This shift marks a rapid transition from a post-pandemic easing cycle to a tightening environment. Geopolitical conflicts not only impact energy but also amplify global uncertainty through supply chain disruptions, further undermining investor confidence in U.S. fiscal and monetary policy.

V. The Federal Reserve’s Policy Dilemma: Major Adjustments to the Interest Rate Path Ahead

Under renewed inflation pressures, the Federal Reserve finds itself in a difficult position. In March 2026, the FOMC meeting maintained the federal funds rate target range at 3.50%-3.75%, with the dot plot indicating only one expected rate cut of 25 basis points for the year, a significant downward revision from previous forecasts. Decision-makers emphasized the need to observe the lasting impact of geopolitical risks on inflation, avoiding premature easing that could trigger a secondary inflation.

This policy shift stands in stark contrast to market expectations at the beginning of the year. The Federal Reserve may be forced to strike a difficult balance between slowing economic growth and inflation risks. A higher interest rate environment will increase borrowing costs for businesses and consumers, suppressing investment and consumption. Analysts point out that if oil prices remain elevated, the Federal Reserve may not rule out further tightening, which would exert additional pressure on the already fragile Treasury market.

VI. Policy Uncertainty Amplifies Market Anxiety

A series of unilateral decisions by the Trump administration—from fiscal expansion to military actions—has significantly increased the unpredictability of policy. Repeated policy reversals have undermined global investor confidence in the U.S. financial system, leading to outflows of foreign capital from the Treasury market. The expectation of an expanding fiscal deficit combined with war spending further raises long-term yields. Historical experience shows that during periods of high policy uncertainty, Treasury volatility often rises in tandem, amplifying systemic risks.

This uncertainty is not limited to domestic issues but also impacts international relations and capital flows. Foreign central banks and sovereign wealth funds are accelerating their reductions of U.S. Treasuries, forcing domestic institutions to fill the gap, but insufficient liquidity limits this process.

VII. Chain Reactions on the Real Economy and Financial System

The rise in Treasury yields directly translates into higher borrowing costs. Mortgage rates and corporate financing costs are climbing simultaneously, suppressing real estate and business investment. Economic growth expectations are downgraded, and the labor market faces pressure, with the unemployment rate likely to gradually rise. At the same time, the stock market is becoming more sensitive to changes in bond yields, and volatility will significantly increase.

The deeper impact lies in the transmission to the financial system. The private credit market is already showing cracks: rising default rates, increased redemption pressures on investors, and banks tightening lending in this sector. Private credit, as an important part of the shadow banking system in recent years, may first trigger localized fractures under pressure and spread to broader asset classes through leverage channels.

VIII. Systemic Risk Assessment and Future Outlook

The U.S. Treasury market is sending a clear warning: the stability of the underlying assets is being eroded. When the world’s safest assets face a “triple pressure” of rising yields, increased volatility, and declining liquidity, the fragility of the entire financial edifice is laid bare. This situation differs from previous cyclical adjustments and is the result of the combined effects of geopolitical shocks and domestic policy uncertainty.

Looking ahead, if the Middle Eastern conflict continues or escalates, oil prices and inflation pressures will further solidify tightening expectations, potentially exacerbating pressures in the Treasury market. Conversely, if diplomatic efforts lead to de-escalation, the market may see temporary recovery. However, regardless of how the short-term evolves, investors need to reassess their risk frameworks: diversify allocations, pay attention to liquidity indicators, and remain wary of policy surprises.

Overall, the current signals from the Treasury market remind all parties that financial stability relies on a predictable policy environment and geopolitical peace. Ignoring this foundation, no asset class can remain insulated. Decision-makers and market participants must jointly confront this challenge to prevent localized pressures from evolving into a systemic crisis.