The South Sea Bubble of 1720: How It Unfolded

The South Sea Bubble of 1720 turned a government debt-conversion scheme into Britain’s first great stock market crash, sending South Sea Company shares from about £128 to more than £1,000 and back to £124 within a year. This documentary traces how war debt, the company’s asiento slave-trading contract, John Law’s Mississippi scheme, and Parliament’s £31.5 million conversion deal set the stage. I break down the conversion arithmetic, installment subscriptions, loans against South Sea stock, and political payoffs that helped drive the boom—and the credit reversal that accelerated the collapse. It also follows Isaac Newton’s trades, the 1721 parliamentary reckoning, and the debate over whether investors were irrational or responding to genuine financial innovation. Whether you study financial history or want to understand how leverage, incentives, fraud, and liquidity can combine inside a bubble, this video gives you a sourced account of how the South Sea Bubble unfolded.

Chapters
0:00 – The South Sea Bubble: From War Debt to Company Shares
1:30 – John Law’s Model and the Debt-Conversion Engine
2:46 – Subscriptions, Stock Loans and Political Payoffs
3:47 – London Mania and the £1,050 Peak
4:44 – The Credit Loop Reverses and the Crash Begins
6:27 – Isaac Newton and Parliament’s Reckoning
7:35 – What Actually Inflated the South Sea Bubble?
8:35 – The 295-Year Legacy

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*Disclosure: This is not financial advice and should not be taken as such. The information contained in this video is an opinion. Some of the information could be wrong. This channel is owned and operated by Portfolio Constructs LLC. Some of the links above are affiliate links, meaning, at no additional cost to you, I will earn a commission if you click through and make a purchase.