Overview
This series explains how the modern sovereign-bond market can amplify a fundamental yield shock through leverage, short-term funding, collateral, dealer capacity, redemptions and cross-border hedging. It separates issuer credit safety from market safety, traces effects into private borrowing and fiscal space, and matches regulation and temporary backstops to the failure surface without treating vulnerability as a forecast.
Learning outcomes
- A government bond can be credit-safe while its market is vulnerable to funding, margin and liquidity stress.
- Leverage makes small yield or spread moves large relative to the capital supporting the position.
- Repo, derivatives, redemptions and shared dealers can synchronize sales without an issuer default.
- High public debt and NBFI exposure can increase sensitivity, while strong capital and liquidity can contain amplification.
- Fiscal credibility, congruent safeguards and targeted, reversible backstops address different failure surfaces.
Keywords
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PlansFAQ
Why can a safe government bond market become unstable?
A government bond market can become unstable when leveraged or liquidity-dependent holders must raise cash while dealers cannot absorb the sales. The issuer need not default; collateral, margin, redemption and funding pressures can amplify an initial yield move.
How does leverage amplify a sovereign-bond price move?
Leverage magnifies a position's loss relative to the investor's capital, while repo haircuts and derivatives margins can demand cash quickly. A forced sale can push prices down and trigger further collateral pressure.
How do foreign investors transmit global funding stress to local-currency bonds?
Foreign investors can sell local-currency sovereign bonds when dollar funding, FX-hedge rollovers or global risk limits become more restrictive. Those outflows can raise local yields even when the sovereign avoids foreign-currency borrowing.
Which policies reduce amplification in sovereign-bond markets?
Fiscal credibility addresses fundamental repricing, while regulation, supervision, haircuts and clearing target leverage and liquidity fragility. Temporary, targeted, reversible backstops can contain acute dysfunction but carry moral-hazard and independence trade-offs.