欧美长期国债再遇抛售潮，财政可持续问题或是罪魁祸首

Core Viewpoint - The recent sell-off in long-term government bonds in the US and Europe is driven by investor concerns over fiscal sustainability and central bank's ability to control inflation, compounded by seasonal liquidity tightening and term premium effects [1][2][5]. Group 1: Market Reactions - Long-term bond yields in the US, UK, Italy, and France have risen significantly, with the US 30-year bond yield increasing by 5.3 basis points to 4.97%, marking a multi-year high [1]. - The negative sentiment in the bond market has spilled over into the stock market, with major indices such as the S&P 500, Dow Jones, and Nasdaq experiencing declines of 0.69%, 0.55%, and 0.82% respectively [1]. - The sell-off in bonds has been linked to a historical context where previous fiscal policies and trade tensions have led to significant fluctuations in bond yields [1][4]. Group 2: Economic Factors - OECD projects that sovereign debt issuance among its 38 member countries will reach a record $17 trillion by 2025, with the debt servicing cost as a percentage of GDP rising to 3.3% in 2024, up from 2.4% in 2021 [4]. - The US is particularly affected, with debt interest costs projected to reach 4.7% of GDP, raising concerns about fiscal sustainability [4]. - Political instability in countries like France and the UK is causing investor anxiety, with discussions around potential IMF assistance emerging [5]. Group 3: Market Dynamics - Seasonal liquidity tightening is identified as a contributing factor to the recent bond market downturn, as September typically sees increased bond issuance from governments and corporations, leading to supply-demand imbalances [6]. - The expectation of a strong US non-farm payroll report could influence market sentiment, with potential implications for Federal Reserve interest rate policies [6]. - Analysts suggest that the current rise in long-term bond yields may not be easily reversed, even with anticipated slight reductions in policy rates [7].