Venice’s failed war against Constantinople led to the first bond market
A 1171 Byzantine crackdown on Venetians forced Venice to issue tradeable, interest-bearing involuntary loans, inadvertently creating the world's first bond market.
read it The article offers a fascinating, well-researched narrative on the intersection of medieval geopolitics and financial innovation that rewards a full read.
summary
In 1171, the Byzantine Empire arrested thousands of Venetians and seized their assets, provoking a retaliatory naval expedition. To fund the fleet, Venice forced wealthy citizens to contribute involuntary loans called prestiti, which featured fixed interest and tradable receipts. When the military campaign failed and Venice couldn't repay the principal, these receipts became permanent state debt traded at the Rialto market. This mechanism laid the foundation for modern sovereign debt and the world's first bond market.
key points
- In 1171, Emperor Manuel I Komnenos imprisoned over 20,000 Venetians and confiscated their property, sparking a retaliatory war.
- To finance the fleet, Venice instituted prestiti: mandatory, interest-bearing loans levied on wealthy citizens with tradeable receipts.
- Unable to repay the principal after the campaign collapsed, Venice turned the debt into a permanent, yield-generating public good traded at the Rialto market.
who should read it
Financial historians, economists, and readers interested in the origins of modern financial markets.
discussion positive
consensus
Commenters expand on the historical context, noting how Venetian trade dominance later fueled the Fourth Crusade and the eventual sack of Constantinople.
pushback
Some users debate the necessity of government bond markets under fiat currencies and critique the broader ethics and mechanics of debt.
A few decades later, Venice brilliantly exploited the Fourth Crusade’s debt (and the fact that they built all the Crusade’s ships) to proceed on a debt-collection/revenge tour along the Adriatic, sacking Zara, getting the entire Crusade excommunicated, and ultimately diverting the entire force to Constantinople where they sacked the city in 1204 and replaced the government with the Latin Empire.
I found City of Fortune by Roger Crowley to be a very entertaining read, the full story of the Crusade is absurd. Venice completely dedicated its entire economy to producing the Crusade’s ships for …
It adds fascinating context about how Venice later leveraged the Fourth Crusade's debt to orchestrate the 1204 sacking of Constantinople.
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