Since 2026, the core anxiety in the global bond market has consistently revolved around the US debt issue. With the US federal government debt surpassing $40 trillion and the debt-to-GDP ratio rapidly approaching 130%, market panic has spread. Many investors worry that the US will reach a sovereign debt threshold, plunging into a crisis of debt default and hyperinflation, potentially triggering a systemic collapse of the bond market. However, considering historical data from the past century and the debt patterns of developed economies, the widely accepted "130% debt-to-GDP threshold" is not the precipice of a debt crisis. The core risk in the current bond market is not the default and hyperinflation perceived by the public, but rather the long-overlooked slowdown in economic growth, shrinking asset returns, and structural deflationary pressures. Clarifying the underlying logic of the high US debt level is crucial for judging bond market trends and constructing a reasonable investment portfolio. The market's panic over a 130% debt ratio stems from a misconception of "absolutely defining debt figures." For a long time, many market opinions have used 130% as a critical threshold for sovereign debt risk, believing that exceeding this value will inevitably lead to sovereign debt default and a high-inflation crisis. However, a review of the century-long debt history of developed economies worldwide reveals that there is no fixed debt-to-GDP threshold that can accurately predict default or high inflation. After World War II, the UK's government debt-to-GDP ratio soared to over 250%, far exceeding the so-called 130% threshold, but it did not default on its sovereign debt, only experiencing periods of mild inflation, smoothly absorbing the high debt pressure through fiscal adjustments and the financial system. Japan is the most typical contemporary example, with its debt-to-GDP ratio consistently maintained at a globally high level of around 230%. Not only has it never defaulted, but it has also faced deflationary pressures for many years without experiencing the runaway inflation feared by the market. Furthermore, developed economies such as Italy and Singapore have maintained debt ratios above 130% for a long time, with inflation levels remaining consistently mild and controllable, and fiscal and bond markets operating stably. Conversely, looking at countries that have historically experienced hyperinflation and debt crises, such as Lebanon, Venezuela, and Sudan, the core triggers for their crises were not high debt ratios, but rather the collapse of economic capacity, the lack of monetary sovereignty, geopolitical conflicts, and the paralysis of their fiscal systems. Furthermore, in most cases, the debt-to-GDP ratio was far below 130% at the time of the crisis. This sufficiently demonstrates that there is no fixed causal relationship between debt ratios and defaults or inflation. The 130% threshold is merely a theoretical assumption in model deductions and is not an absolute risk threshold applicable to all economies, especially not directly applicable to developed economies with monetary sovereignty. The public's misjudgment of the risks of US debt stems from equating US government finances with those of ordinary households—a core logical fallacy in interpreting sovereign debt issues. Ordinary households follow the rigid rule of "earn first, consume later," and excessive debt directly leads to debt repayment crises and bankruptcy risks. However, the US government, with its right to issue its own currency, operates under a completely different fiscal logic. US government debt is denominated in US dollars, and the US dollar is issued exclusively by the US. This means that the US is fundamentally immune to the possibility of passive debt default, unlike economies without monetary sovereignty such as Greece, which faced default due to foreign currency debt repayment pressures. When Greece defaulted in 2012, its debt ratio was lower than that of post-World War II Britain and present-day Japan, but because it used the euro and lacked independent monetary control, it ultimately could not resolve its debt repayment pressures. This comparison fully demonstrates that "monetary sovereignty" is the core factor determining debt risk, not the debt amount itself. Furthermore, US federal government debt is not simply a fiscal burden, but a core safe-haven asset for the private sector. Every issuance of US Treasury bonds corresponds to a private sector asset surplus. As a core global safe-haven asset, US Treasury bonds are widely held by American households, pension funds, banks, and funds, forming a crucial cornerstone of global financial system stability. Assessing the sustainability of US debt cannot be separated from its unique wealth reserves. Currently, the net wealth of US households and non-profit organizations is close to $196 trillion, six times the annual GDP and five times the size of the federal government debt. As the largest economy in human history in terms of wealth, capital markets, and currency with global reserve attributes, the United States does not possess the fundamental conditions for a sudden debt crisis. Compared to the abstract 130% debt threshold, the real risk facing the US economy and bond market is the hidden impact of long-term structural downward pressure, and the debt ratio is likely to continue rising rather than peaking and declining. Three long-term structural factors—population aging, income inequality, and technological change—are continuously suppressing economic growth and price levels, creating stubborn deflationary headwinds, and government fiscal spending is the core means of counteracting these headwinds. From a demographic perspective, the US is aging rapidly, leading to decreased consumer spending and increased savings. Meanwhile, rigid fiscal expenditures such as social security and healthcare are rising year by year. The Congressional Budget Office predicts that US fiscal spending as a percentage of GDP will continue to rise over the next decade, directly driving up the debt ratio. Income inequality has further exacerbated weak demand. The top 1% of Americans hold over 32% of household net wealth, while the bottom half holds only 2.3%. Excess savings by high-income earners are largely tied up, failing to translate into consumption and investment, and continuously dragging down aggregate demand. While technological changes such as artificial intelligence and automation will benefit productivity in the long term, they will suppress labor costs and wage growth in the short term, creating persistent deflationary pressure. Under the combined effect of these factors, the endogenous growth momentum of the US economy continues to weaken, necessitating increased fiscal spending and debt to support the economy. This means that the US debt-to-GDP ratio exceeding 130% and continuing to rise will be a long-term trend, not a short-term tipping point risk. As for the current market discussions about a rebound in inflation and rising interest rates, these are not harbingers of a sovereign debt crisis, but rather a phase of adjustment under short-term external shocks. The core driver of rising market interest rates and a temporary increase in inflation in 2026 will be the continued disruption of commodity supply chains due to the Iranian geopolitical conflict, pushing up global commodity prices. This is a typical cost-push inflation, not demand-driven inflation caused by excessive US debt. Such inflationary fluctuations are characterized by their phased nature and externalities, and cannot change the core trend of long-term deflation in the economic fundamentals, much less trigger the risk of a US Treasury default. For bond investors, the real concern is not extreme defaults or hyperinflation, but rather the long-term, moderate wealth dilution effect. Looking at the historical patterns of highly indebted economies, high debt environments rarely lead to sudden collapses; instead, they are more often characterized by long-term economic slowdown and persistently negative real yields on long-term bonds. Data shows that in developed economies with high debt levels lasting more than five years, the average annual economic growth rate falls by an additional 1.2 percentage points, and the average duration of these periods of stagnation is 23 years. Post-war, the US and UK gradually diluted their debt burden through a long-term negative real interest rate and moderate inflationary financial repression model. Ultimately, it was long-term bondholders who paid the price, with the real yields of long-term government bonds consistently lagging behind inflation, resulting in a slow decline in asset value. Based on the current market structure and long-term economic trends, the investment logic suitable for the bond market is clear. Under an asset-liability management framework, investors should abandon the traditional approach of pursuing high yields on long-duration bonds and prioritize the allocation of short-duration bond assets. Short-term Treasury bonds and Treasury Inflation-Protected Securities (TIPS) can be quickly repriced in line with market interest rates and inflation levels, effectively mitigating the risk of yield reduction in long-term bonds. Currently, 5-year and 10-year TIPS can lock in stable positive real returns, making them excellent tools for hedging against financial repression. Simultaneously, it's necessary to appropriately allocate assets to a portfolio of insurance assets such as gold, managed futures, and commodities to hedge against extreme scenarios of simultaneous stock and bond declines, enhancing the defensive attributes of the investment portfolio. For ultra-long-term allocation funds, one should move beyond a pure bond asset framework and diversify globally in equity assets, leveraging the profit growth and pricing power of real economy enterprises to hedge against currency and debt volatility risks, and relying on long-term growth in the capital market to weather economic cycles. At the market observation level, investors should not be overly concerned with fluctuations in the debt ratio, but rather focus on core indicators such as the Federal Reserve's inflation tolerance, the proportion of fiscal spending, and the correlation between the dollar interest rate and exchange rate to accurately grasp the true trend of the bond market. In conclusion, a debt-to-GDP ratio of 130% is by no means a critical point for the US bond market. For the United States, with its monetary sovereignty and vast national wealth, high debt will not trigger default or a hyperinflation crisis. The real risks in the bond market lie in the economic vulnerability under structural deflationary pressures and the dilution of returns on long-term bond assets. Given the current market environment of high debt levels, both panic-driven risk aversion and aggressive duration speculation are undesirable. A tiered allocation strategy, combining short-duration core bonds, defensive portfolio insurance, and long-term real equity assets, is the optimal solution for the current bond market.