Understanding Defense Bonds

Intro

Defense and military spending play a larger role in bond markets than most people realize.

When governments increase spending on defense, it affects:

• Interest rates

• Inflation

• Bond yields

Understanding this relationship is key to analyzing bond risk in a changing world.

What are Defense Bonds?

Defense bonds are not a separate asset class.

They refer to:

• Bonds issued by defense companies

• Government bonds funding military spending

Examples include companies like Lockheed Martin or BAE Systems, as well as sovereign debt issued by countries financing defense budgets.

Why defense spending matters

When defense spending increases, three key effects occur:

1. Higher Government Borrowing

Governments issue more bonds to finance military budgets.

2. Inflation Pressure

Large spending programs can increase demand in the economy.

3. Rising Yields

More supply and higher inflation expectations often push interest rates higher.

How this impacts Bonds

Bond prices move inversely to yields.

This means:

• Rising yields → falling bond prices

• Falling yields → rising bond prices

The sensitivity of a bond to these changes is measured by duration.

Key metrics

Understanding defense-related bond risk comes down to a few core metrics:

Duration

Measures how sensitive a bond is to interest rate changes.

Modified Duration

Estimates how much the price will move for a 1% change in yield.

Convexity

Adjusts for larger interest rate movements.

These are the same metrics used across professional fixed income analysis.

Real world context

Geopolitical events such as the Ukraine War have shown how quickly defense spending and bond markets can shift.

Changes in risk perception, inflation expectations, and government borrowing all feed directly into bond pricing.

Practical takeaway

You don’t need complex systems to understand bond risk.

What matters is:

• How yields move

• How sensitive your bond is

• And how scenarios impact your position

Go Deeper

This page gives you the fundamentals, the full picture goes further. The Defense Bonds eBook explains how geopolitics, interest rates, and government spending interact in real bond markets.

Get the eBook

Related Bond Market Tools and Pages

You can explore additional BondStats tools and analysis:

• Recession Probability Monitor – Estimate recession risk using yield curve signals.

• Yield Curve Monitor – Track changes in the shape of the yield curve.

• Global Bond Yields – Compare government bond yields across countries.

• Bond Yield Spread Calculator – Analyze yield differences between sovereign bonds.

• Real Yield Calculator – Calculate inflation-adjusted bond returns.

Last Updated: April 8, 2026