日债暴跌：正在形成一个"价值陷阱" 穆迪降级引发美债市场动荡，而30年期日债收益率近期的上涨幅度甚至超过了美债。 自4月初以来，30年期日债收益率已经飙升了85个基点，同期30年期美债收益率上升了60个基点。尽管货币对冲后的日债收益率对外国投资者看似极具吸引 力， 但摩根士丹利最新分析警告投资者，这可能是一个正在形成的"价值陷阱"。 日本长期国债崩塌，会是全球债券市场的"金丝雀"预警？ 近期，30年期日本国债收益率急剧上升至历史高位，目前已与德国30年期国债收益率相当，这在历史上很少出现。这一上升趋势始于4月中旬并持续至今，引 发了市场对全球债市的担忧。 据追风交易台， 摩根士丹利在最新的报告中表示，结构性供需失衡导致日债陷入"价值陷阱"，即便货币对冲后债券看起来"便宜"但可能进一步下跌。 进一步来看，日债崩塌或是全球债市结构性问题的预警信号，高盛在报告中表示，全球债市面临共同的三重压力：持续通胀压力、ALM投资者需求下降、政府 融资需求高企。 大摩也警告，日债持续走弱暗示美国长期国债也面临同样命运，美债收益率曲线可能进一步陡峭化。 从表面数据看，日债对外国投资者的吸引力确实惊人。大摩报告指出： 对美元投资者 ...

Core Viewpoint - The sharp rise in Japan's 30-year government bond yields signals potential structural issues in the global bond market, with Japan's situation possibly serving as a "canary in the coal mine" for broader market concerns [1][8]. Group 1: Japan's Bond Market Dynamics - Japan's 30-year government bond yields have surged to historical highs, now comparable to Germany's, raising alarms about the global bond market [1]. - Morgan Stanley warns of a "value trap" in Japanese bonds, where seemingly cheap bonds may continue to depreciate due to structural supply-demand imbalances [3][7]. - Since early April, the 30-year Japanese bond yield has increased by 85 basis points, outpacing the 60 basis point rise in U.S. bonds during the same period [3]. Group 2: Global Bond Market Implications - High inflation pressures, declining demand from asset-liability management (ALM) investors, and high government financing needs are identified as three global trends affecting bond markets [9]. - Japan's core inflation rate has exceeded the Bank of Japan's 2% target for two consecutive years, contributing to rising equilibrium yields [9]. - The ongoing high fiscal deficits in developed markets are expected to keep debt issuance levels elevated, further pressuring long-term bonds [9]. Group 3: U.S. Bond Market Concerns - The rise in Japanese bond yields is expected to influence U.S. Treasury yields, potentially steepening the yield curve [2][11]. - Morgan Stanley indicates that the risk-reward ratio for long-term U.S. bonds is less favorable compared to short-term bonds, with a significant disparity in risk-adjusted returns [11]. - The attractiveness of hedged Japanese bonds may lead to a reallocation of investment portfolios, putting additional downward pressure on the U.S. long-term bond market [11]. Group 4: Potential Responses from the Bank of Japan - The Bank of Japan's future policy direction is under scrutiny, with potential measures including adjusting the duration of issued debt and maintaining a steady pace of quantitative tightening [13]. - A gradual return to interest rate hikes is anticipated, with expectations for the next rate increase in January 2026, which could flatten the yield curve and manage long-end risk premiums [13].