Faster China government-bond issuance may temporarily raise front-end yields, but a sustained sell-off remains unlikely

Overview

This report examines how an expected acceleration in China’s central and local government-bond issuance could affect bond yields and swap rates. Goldman Sachs concludes that greater CGB supply is most likely to create temporary front-end funding pressure and a bear-flattening curve response, while longer-term Chinese rates should retain a structural downward bias.

Core views

Following softer growth momentum and sluggish fiscal spending in the first seven months of 2026, government-bond issuance has begun to accelerate after the July Politburo meeting called for faster fiscal expenditure and use of bond proceeds. Goldman Sachs expects total net issuance of central and local government bonds to reach 1% of GDP per month during September–October, up from around 0.6% in H1. It expects CGB net issuance to rise from 0.3% of GDP per month in H1 to 0.6% in September–October, and LGB net issuance to increase from 0.3% to 0.5%. The RMB800bn New Policy-Based Financing Instrument has also started to be allocated. The report emphasizes that heavier issuance does not mechanically produce higher long-term yields. In the mid-2020 RMB1 trillion anti-Covid special-CGB program, 10-year CGB yields rose as repo rates normalized from pandemic lows toward the PBOC’s OMO target, suggesting tighter funding conditions were a major driver. In May–June 2022, accelerated LGSB issuance coincided with fiscal support, weak growth and expectations of accommodative monetary policy; 10-year yields were initially stable and later declined. In late 2023, funding pressure appeared before the bulk of special refinancing LGB and additional RMB1 trillion CGB issuance, with the sell-off concentrated at the front end. In late 2024, 10-year yields fell despite a RMB10 trillion debt-swap plan, as markets anticipated easier monetary policy and viewed the package as refinancing rather than new fiscal borrowing for spending. These episodes lead the report to focus on PBOC liquidity operations, fiscal-proceeds disbursement, growth expectations and policy-rate expectations rather than supply alone. Using monthly regressions from June 2016 to June 2026, with controls for growth expectations, inflation expectations and the DR007-OMO funding gap, Goldman Sachs finds that CGB supply has its largest effect at the front end. A 0.2% of GDP increase in monthly net CGB issuance—approximately one standard deviation in the sample—is associated with a 4.8bp rise in the 1-year CGB yield, compared with 2.0bp for the 5-year and 1.5bp for the 10-year. The estimated 30-year impact is 0.7bp and statistically insignificant. The report characterizes this pattern as bear flattening: supply transmits mainly through short-term funding conditions rather than through a substantial increase in the long-end risk premium. The proposed mechanism is that commercial banks, as major government-bond investors, preserve liquidity ahead of large issuance. This can temporarily drain interbank liquidity, increase short-term funding rates and put greater pressure on shorter-dated CGB yields. By contrast, weak loan demand leaves banks with capacity to invest in bonds, while insurers and investors matching long-duration liabilities can absorb longer-dated supply. The lower explanatory power of the regression at longer maturities also indicates that long-end yields are influenced by factors outside the model, including structural asset-allocation demand. The relationship varies by issuance type and timing. Net CGB issuance has a positive coefficient, whereas evidence for LGB issuance and combined government issuance is less conclusive. Goldman Sachs attributes the limited LGB spillover to wider LGB-CGB spreads absorbing incremental supply, coordination between LGB and CGB issuance, and the tendency of bank and insurance holders to retain LGBs to maturity. The estimated CGB effect is stronger after 2023, potentially reflecting more frequent upside surprises to issuance quotas. Contemporaneous issuance has the largest coefficient; prior-month issuance is smaller and insignificant, while a positive next-month coefficient suggests markets partly price expected supply in advance. The supply relationship also extends across short-dated rates products. One-year CDB yields and one-year IRS rates show positive and significant associations with CGB issuance, consistent with funding pressure spreading across markets. Longer-dated CDB and IRS estimates are positive but statistically insignificant. Goldman Sachs notes that temporary funding-cost increases may have limited effects on five-year swaps if investors expect PBOC liquidity support to normalize funding conditions. Looking ahead, the report expects faster issuance, especially CGB supply, to lift front-end yields temporarily, particularly around quarter-end when interbank liquidity is seasonally tighter. However, it considers a sustained CGB sell-off unlikely unless repo rates remain materially above the OMO policy rate, signaling limited PBOC liquidity accommodation. With repo rates broadly anchored, domestic demand and credit conditions weak, and inflation expectations low despite the global energy-supply shock, Goldman Sachs expects longer-run Chinese rates to remain structurally on a downward trend because of excess savings, subdued private-sector credit demand, high debt accumulation and demographic headwinds.

Analysis framework

The report first compares four historical issuance episodes to show that supply effects depend on liquidity and macro conditions. It then uses monthly regressions of CGB-yield changes on net issuance, controlling for growth expectations, inflation expectations and the DR007-OMO funding gap, before comparing effects by maturity, bond type and issuance timing.

Methodology notes

• Fixed Income and CreditYield curve analysis

  Yield-curve analysis across 1-year, 5-year, 10-year and 30-year CGB maturities.

  The report compares issuance sensitivity across maturities to conclude that supply pressure is concentrated at the front end and produces a bear-flattening response.

• Industry AnalysisSupply-demand framework

  Bond-supply and investor-absorption analysis conditioned by liquidity and fiscal spending.

  The report assesses how CGB and LGB issuance, bank liquidity management, insurer demand and PBOC accommodation affect bond-market pricing.

• Other

  Monthly regression analysis controlling for growth expectations, inflation expectations and the DR007-OMO spread.

  The regression isolates the conditional association between issuance and yield changes rather than treating issuance as the sole driver.

Key data

• Expected total monthly net government-bond issuance1% of GDPExpected in September–October 2026, versus around 0.6% of GDP per month in H1 2026.
• Expected monthly net CGB issuance0.6% of GDPExpected in September–October 2026, up from 0.3% of GDP per month in H1.
• Expected monthly net LGB issuance0.5% of GDPExpected in September–October 2026, up from 0.3% of GDP per month in H1.
• One-year CGB yield sensitivity to net CGB issuance4.8bpEstimated increase from a 0.2% of GDP rise in monthly net CGB issuance.
• Five-year CGB yield sensitivity to net CGB issuance2.0bpEstimated increase from a 0.2% of GDP rise in monthly net CGB issuance.
• Ten-year CGB yield sensitivity to net CGB issuance1.5bpEstimated increase from a 0.2% of GDP rise in monthly net CGB issuance.
• Regression sampleJune 2016–June 2026Monthly regressions with monthly dummies.
• New Policy-Based Financing InstrumentRMB800bnAnnounced earlier in 2026 and beginning to be allocated.

Impact & implications

Goldman Sachs argues that the near-term impact of accelerated issuance should be concentrated in short-dated CGBs, short-dated CDBs and one-year IRS rates as banks manage liquidity. Long-dated yield effects should remain more muted unless funding tightness persists because of limited PBOC liquidity accommodation.