Japan to consider buying back some super-long government bonds, sources say

Japan is considering buying back previously issued super-long government bonds (20-40 year maturities) to curb abrupt yield increases, following a recent surge in yields driven by dwindling demand and concerns over rising debt. This potential buyback, coupled with a possible reduction in new issuance of these bonds, aims to address an over-supply and stabilize the JGB market, where the 30-year yield had reached 3.185% last month. The Ministry of Finance will consult with market participants before making a final decision, while the BOJ is also considering adjustments to its bond-tapering program.

Analysis

Japan is actively considering the buyback of previously issued super-long government bonds (SLGBs) alongside a planned reduction in new issuance for maturities of 20 to 40 years, signaling a concerted effort to manage the recent surge in bond yields and address concerns of over-supply. This consideration follows a period of significant market stress, evidenced by the 30-year JGB yield reaching a high of 3.185% in May, driven by diminished demand from traditional investors and global anxieties over rising sovereign debt levels. The news of potential buybacks prompted an immediate positive market reaction, with the benchmark 10-year JGB yield falling to 1.45% and the 30-year yield paring earlier gains to 2.89%, reflecting investor relief over potential government action to address the over-supply of over 24 trillion yen in scheduled SLGB sales this fiscal year. The Ministry of Finance is expected to finalize its decision on buybacks, which would require budgetary approval and thus take time, following consultations with market participants on June 20 and June 23. This initiative, described by Nomura Securities as a "move in the right direction," complements the Bank of Japan's ongoing review of its bond-tapering program, with Governor Kazuo Ueda expressing vigilance over the economic impact of large swings in SLGB yields. These domestic measures occur within a global context of rising long-term bond yields and against a backdrop of domestic political pressure for increased fiscal spending, which could further challenge Japan's substantial public debt.

Key Decisions for Investors

• Investors should anticipate potential near-term stabilization and a modest decline in super-long JGB yields if the proposed buybacks and issuance cuts are confirmed, creating a more favorable environment for existing bondholders.
• Closely monitor the Ministry of Finance's announcements following the late June market consultations and the Bank of Japan's upcoming policy meeting on June 16-17 for concrete details on these measures, as these will be critical inflection points for JGB market sentiment and strategy.
• Evaluate the sustainability of any yield suppression in light of Japan's significant public debt and potential for increased fiscal stimulus or tax cuts, as these underlying factors could continue to exert upward pressure on yields over the medium to long term, potentially offsetting the impact of these interventions.