寻锚超长债系列报告（一）：海外超长债如何定价？

1. Report Industry Investment Rating No information provided in the report. 2. Core Viewpoints of the Report - The report aims to systematically construct an analytical framework for the issuance and pricing of ultra - long bonds, and comprehensively analyzes the historical evolution and theoretical framework of overseas ultra - long bonds. It first reviews the history and motives of the US, Japan, and Germany in issuing ultra - long bonds, then analyzes the supply and demand sides, introduces the Bernanke three - factor pricing model to attribute the yield fluctuations of ultra - long bonds, and finally summarizes historical experience through the review of recent yield changes [4][7][20]. 3. Summary by Relevant Catalogs 3.1 Government's Motivation for Issuing Ultra - long Bonds - Origin of Ultra - long Bonds: In 1953, the US Treasury issued the first ultra - long bond to reduce the cost of frequent short - term bond issuance; in 1986, Germany issued its first ultra - long bond to extend debt duration and reduce refinancing risk; in 1999, Japan included 30 - year treasury bonds in its issuance system to diversify the bond market's maturity structure [21]. - Motives for Issuing Ultra - long Bonds: Overseas countries issue ultra - long bonds mainly to raise funds for structural fiscal expansion, optimize the debt structure, and meet the market demand for long - term safe assets. For example, after 2008, the US increased 30 - year bond issuance with the expansion of fiscal deficits, and Japan used ultra - long bonds to support the economy in a deflationary environment [24]. 3.2 Historical Review of Ultra - long Bond Development - US: The development of US ultra - long bonds follows the logic of "crisis - driven + policy linkage". During economic crises, the government increases issuance to supplement fiscal funds, and the Fed lowers interest rates and buys bonds to support the market. Yield trends are closely related to issuance scale [30]. - Japan: The development of Japanese ultra - long bonds is a win - win for finance and currency. It helps the government finance and reduces long - term costs, and is also a tool for the central bank to control the yield curve. Issuance scale increases during crises with central bank easing [34]. - Germany: German ultra - long bonds show a dynamic evolution of "demand - anchored, cycle - adapted, and function - expanded". Initially for debt maturity structure optimization, they later meet long - term expenditure needs and expand functions such as being an interest - rate benchmark and a safe - haven asset [37]. 3.3 Ultra - long Bond Pricing: Supply and Demand - Supply Side: Taking the US as an example, Congress confirms the fiscal budget and debt ceiling in advance, and the Treasury formulates a specific issuance plan. The issuance form includes new issuance and additional issuance. The issuance mechanism in the US, Germany, and Japan varies. The US uses a "single - price (Dutch)" auction, while Germany and Japan use a "multiple - price" auction. The proportion of long - term bond issuance is mainly determined by financing costs, term premiums, and debt management strategies [41][49][50]. - Demand Side: The demand for ultra - long bonds comes from three aspects. Pension funds and insurance companies have rigid asset - liability management needs; hedge funds, banks, and asset management institutions have trading and arbitrage needs; central banks buy and sell ultra - long bonds for unconventional monetary policies and financial stability. Currently, the demand for US ultra - long bonds is more diversified, with investment funds becoming the largest demanders, and the proportion of primary dealers' allocation decreasing [54][61]. 3.4 Ultra - long Bond Pricing - Bernanke Three - factor Model: The long - term interest rate is decomposed into inflation expectations, the expected path of short - term real interest rates, and term premiums [70]. - Inflation Expectations: Long - term inflation expectations fluctuate around the 2% inflation target and are affected by economic growth. When the economy grows strongly, inflation expectations rise [74][76]. - Expected Real Short - term Interest Rates: The short - term real interest rate is mainly determined by the benchmark interest rate. The Fed's benchmark interest rate decision considers inflation and the employment market [79]. - Term Premiums: In recent years, the impact of term premiums on long - term bond yields has increased. It includes factors such as liquidity premiums, credit risk premiums, growth premiums, and inflation volatility premiums. Central bank quantitative easing policies can suppress term premiums, and credit risk premiums were significant during the European debt crisis, while fiscal expansion can increase growth risk premiums [81][85][87]. 3.5 Recent Trends and Future Forecasts - Current Trends: In the context of the global "big fiscal" era, concerns about the debt sustainability of developed economies have led to a re - evaluation of term premiums, causing the yields of US, Japanese, and German ultra - long bonds to rise. For the US, expansionary fiscal policies and a weakened US dollar have increased term premiums; for Japan, the central bank's policy adjustment and fiscal deterioration have led to a rise in yields; for Germany, fiscal expansion has pushed up yields [91][93][95]. - Future Forecasts: Unless developed economies abandon the "debt - driven" development model and improve long - term productivity, overseas ultra - long bond yields may continue to rise. It is expected that by the end of 2026, the yields of 10 - year and 30 - year US Treasury bonds may reach around 4.6% and 5.1% respectively [97].