
GDP-linked bonds are a type of debt security that ties the interest payments to the country's GDP growth rate.
These bonds are designed to provide a hedge against inflation, as the interest payments increase when the economy grows.
They're often used by governments to raise funds for specific projects or to refinance existing debt.
Investors in GDP-linked bonds benefit from the potential for higher returns when the economy is growing.
The interest payments on these bonds are calculated using a formula that takes into account the country's GDP growth rate.
This means that if the economy is growing rapidly, the interest payments on the bond will increase accordingly.
GDP-linked bonds can be an attractive investment option for those looking for a low-risk way to participate in economic growth.
The Problem with GDP-linked Bonds
GDP-linked bonds are not a solution to a problem that governments in developed economies face. Governments in these countries can print their own money, so they don't have a meaningful debt constraint.
The idea of GDP-linked bonds was first proposed by Robert Shiller back in 1993, but it's been gaining attention lately due to soaring debt caused by lockdowns.
GDP-linked bonds link interest payments to GDP growth, which means the government pays out more interest when the economy does well and less when it's in a recession. This is supposed to make high debt more sustainable, but it's not a problem that governments in developed economies have.
Economists at the Bank of England estimate that GDP-linked bonds will reduce the government's interest bill in normal times. However, this is not a compelling reason to adopt this type of bond.
Is a Solution Possible?
A six-month lag in data revisions seems like an easy fix, but it's not a solution that's being considered.
Most recessions last less than two years, which means a longer lag would reduce the cyclical benefits to the government debt manager.
Maintaining two sets of estimates, one under the old methodology and one under the new, is one idea that's being floated.
This approach is likely to be confusing and may invite skepticism about the quality of the data, especially over long periods of time.
Establishing investor confidence in GDP-linked bonds requires a better approach to the obstacles posed by data revisions and changes in methodology.
Economists and finance practitioners alike are working on finding a solution to this challenge.
The recent issuance of GDP-linked savings certificates in Portugal and wage-indexed bonds in Uruguay shows that state-contingent debt instruments referencing macroeconomic variables are technically viable.
A trial issuance by a single innovator or a supportive multilateral development bank could help overcome the first-mover problem.
A better understanding of how GDP-linked bonds work and what benefits they offer is needed before a coordinated effort among issuers can be made.
The eBook on GDP-linked bonds aims to provide a comprehensive assessment of the economic, commercial, legal, and operational considerations relevant to debt managers and investors.
Understanding the Concept
GDP-linked bonds are a type of bond where interest payments are linked to a country's GDP growth. This means that when the economy does well, the government pays out more interest, and when there's a recession, it pays less.
The idea of GDP-linked bonds was first proposed by Robert Shiller back in 1993, but few countries took up the suggestion. Now, with governments facing soaring debt due to lockdowns, they're back in fashion.
Issuing GDP-linked bonds could help countries achieve a debt structure that's more resilient to economic downturns and more robust to disappointments about long-term growth prospects. For a representative advanced economy, gains in fiscal space could be in the order of 10-60% of GDP.
Why We Don't See Bonds: The Problem with Data Revisions
Bonds are often overlooked in financial discussions, but they play a crucial role in the economy.
One reason we don't see bonds is that they are not as flashy as stocks, which can make them seem less exciting.

Data revisions are a major problem when it comes to bonds, as they can significantly impact the value of a bond.
In fact, a 1% change in data revisions can result in a 10% change in bond prices.
This is because bond prices are highly sensitive to changes in interest rates and inflation expectations, both of which can be influenced by data revisions.
As a result, investors need to be aware of data revisions and their potential impact on bond prices.
Abstract
GDP-linked bonds have their cashflows linked to a country's national output. This is a crucial aspect of these bonds, as it allows governments to issue debt that is more resilient to economic downturns and more robust to disappointments about long-term growth prospects.
Robert Shiller first proposed GDP-linked bonds back in 1993, in his book Macro Markets. Few countries took up his suggestion, but with governments facing soaring debt, they're back in fashion.

The cost of servicing debt falls when tax revenues fall, making high debt more sustainable. This is because the interest payments on GDP-linked bonds are linked to GDP growth, so when the economy does well, the government pays out more interest, and when we get a recession, it pays less.
Economists at the Bank of England estimate that such bonds will reduce the government's interest bill in normal times. Investors will accept lower interest payments in exchange for the prospect of a rising payout as the economy grows.
However, GDP-linked bonds may not be as necessary for governments in developed economies that can print their own money. These governments don't face any meaningful debt constraint, making GDP-linked bonds more of a precautionary measure.
But there are stronger reasons why we need GDP-linked securities. For example, countries with particularly volatile GDP should be willing to pay a premium of up to around 260 basis points to insure against that volatility.
Frequently Asked Questions
What is a KPI linked bond?
A KPI-linked bond is a type of bond where the issuer's sustainability performance is measured against specific key performance indicators (KPIs). The bond's terms, such as coupon rates, can change based on the issuer's progress towards meeting these KPIs.
Sources
- https://cepr.org/voxeu/columns/gdp-linked-bonds-primer
- https://cepr.org/publications/sovereign-gdp-linked-bonds-rationale-and-design
- https://papers.ssrn.com/sol3/papers.cfm
- https://www.investorschronicle.co.uk/content/176b047e-a592-5382-a867-7705d12efcee
- https://www.elibrary.imf.org/view/journals/053/2021/001/article-A002-en.xml
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