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100-Year Bonds (Century Bonds)




In the world of corporate finance, a decade is often considered long-term.

However, a select group of global institutions is looking much further ahead—specifically, to the next century.

Known as “Century Bonds,” these 100-year instruments represent the ultimate vote of confidence in an organization’s permanence.

While once a rare curiosity, they have re-emerged as a strategic tool for entities ranging from entertainment empires to tech titans.

The Allure of the 100-Year Maturity

The primary appeal of a 100-year bond for an issuer is the ability to lock in capital at a fixed interest rate for a period that exceeds the human lifespan.

This provides a hedge against future interest rate volatility and eliminates the “refinancing risk” that usually comes with 5-year or 10-year debt cycles.

Real Business Examples:

Alphabet (Google): In early 2026, Alphabet made headlines by issuing a multi-billion dollar debt package that included a 100-year Sterling-denominated bond. This move signaled a shift for the tech giant, moving away from a pure cash-heavy model to behaving like a long-term infrastructure operator.

The Walt Disney Company: In 1993, Disney famously issued its “Sleeping Beauty” bonds—$300 million in debt maturing in 2093. These were structured with a 30-year call provision, allowing Disney to buy them back starting in 2023 if market conditions favored a refinance.

The Republic of Austria: Sovereigns also play this game. Austria has repeatedly tapped the 100-year market, even issuing bonds with coupons below 1% during periods of historic low rates. For the government, it is a way to fund national infrastructure projects with money that won’t need to be repaid until the 22nd century.

Mapping the Bond Spectrum: Short, Medium, and Ultra-Long

While century bonds grab the headlines, the majority of the $130 trillion global bond market operates on much shorter timelines.

Businesses choose their maturity based on their specific capital needs and the current yield curve.

Term LengthTypical DurationStrategic Business Use CaseGlobal Example
Short-Term1 – 3 YearsBridging seasonal cash flow gaps or funding immediate inventory needs.Ford Motor Credit frequently issues short-term notes to fund consumer auto loans.
Medium-Term4 – 10 YearsStandard corporate expansion, R&D, and equipment upgrades.Apple often uses 7-year and 10-year tranches to fund its massive share buyback programs.
Long-Term15 – 30 YearsFinancing major capital projects like factories, power plants, or acquisitions.Amazon utilized 30-year debt to help finance its $13.7 billion acquisition of Whole Foods.
Ultra-Long50 – 100 YearsEndowment funding, generational infrastructure, or total capital insulation.Oxford University issued 100-year bonds in 2017 to fund research facilities and housing.

The Risks: Inflation and Survival

For investors, the century bond is a double-edged sword.

On one hand, it offers high convexity—a technical term meaning the bond’s price can rise dramatically if interest rates fall further.

On the other hand, it carries massive inflation risk. If inflation averages 3% over the next century, the purchasing power of the principal repaid in 2126 will be a mere fraction of its value today.

Furthermore, there is the question of corporate mortality.

While institutions like Oxford University have already survived for 800 years, the average lifespan of an S&P 500 company is less than 20 years. Buying a 100-year bond from a tech company is a bet that their business model will survive the advent of AI, quantum computing, and whatever follows.

Strategic Outlook

For a CFO, the 100-year bond is less about immediate cash and more about legacy and stability.

By diversifying their debt portfolio with a mix of 5-year “working capital” bonds and 100-year “permanence” bonds, modern corporations can build a balance sheet that is resilient against almost any economic weather.

Analyze the specific coupon rates and investor demand for Alphabet’s recent century bond issuance.