The South Sea Bubble (1711-1721)
Britain's first great financial crash. A public-private company created to manage the national debt, whose real business was the Atlantic slave trade, drove its shares from 128 pounds to nearly 1,000 and back within a single year, ruining thousands of investors, disgracing a government, and shaping financial regulation for a century.
Events
A Company Built on the National Debt
The South Sea Company received its royal charter, conceived by Chancellor Robert Harley and promoter John Blunt to consolidate some 9 million pounds of short-term government debt. Creditors exchanged debt for company stock, with the Treasury paying the company an annual sum to fund dividends. The company was also granted a monopoly on trade with Spanish South America, though Britain was at war with Spain at the time and no such trade could realistically occur.
Location: London, England
The Asiento and the Slave Trade
The Treaty of Utrecht ending the War of the Spanish Succession granted Britain the Asiento de Negros, a 30-year contract to supply 4,800 enslaved Africans each year to Spanish America, which was contracted to the South Sea Company. The company transported over 34,000 enslaved people during its history, but the trade itself remained unprofitable amid smuggling, disputes with Spanish authorities, and war. The company's value to investors rested almost entirely on its financial engineering rather than its commerce.
Location: Utrecht, Netherlands
The Debt-Conversion Scheme
Parliament accepted the company's proposal to take over some 31 million pounds of the national debt, converting annuities into company shares. The company won the bidding against the Bank of England with generous terms that included bribes of company stock and cash to ministers and members of Parliament, and insider purchases of annuities before conversion prices rose. The scheme was celebrated as a triumph for public credit, and King George I became governor of the company.
Location: London, England
The Bubble Act
With speculative joint-stock companies multiplying and drawing money away from South Sea stock, the company promoted the Bubble Act, which forbade unchartered joint-stock companies and unauthorized share issues. The act, passed in June 1720, was intended to protect the company's monopoly on speculation, but it undermined confidence in the entire market, including the South Sea Company itself, as its provisions began to be enforced against smaller ventures later that summer.
Location: London, England
The Bubble Inflates
Share prices rose from 128 pounds in January 1720 through successive subscription offerings to a peak approaching 1,000 pounds in late June. The company lent investors money against its own shares to buy more shares, talked up imaginary trading profits, and made its stock the centerpiece of a speculative mania that spread across Britain and abroad, drawing in everyone from aristocrats to servants and clergymen. Critics at the time, and historians since, have documented that insiders knew the underlying trade could never justify the valuations.
Location: London, England
The Crash
The share price, sustained by instalment plans, insider loans, and forward sales, collapsed from its June peak through 800 pounds in August to below 200 pounds by the end of September. Tens of thousands of investors were ruined, including widows, clergy, and members of the royal household who had accepted the company's preferential share allocations. The failure spread to banks and insurers, most notably the Sword Blade Bank, the company's own banker, whose stoppage in September froze the credit of the City of London.
Location: London, England
The Parliamentary Inquiry
A parliamentary inquiry found that directors had traded in their own shares on insider knowledge, that bribes and fictitious stock allocations had been made to ministers, courtiers, and the King's mistresses, and that the company's books had been falsified. Chancellor of the Exchequer John Aislabie was expelled from Parliament and sent to the Tower; directors' estates were confiscated toward the company's debts; and the cashier Robert Knight fled abroad carrying the incriminating ledger. Public anger was intense, with pamphlets and prints depicting the directors as villains.
Location: London, England
Walpole's Rescue and the Aftermath
Robert Walpole negotiated the "skimming of the froth," dividing the losses between the company, the government, and the Bank of England, and restructuring the South Sea Company, which survived until 1853. Walpole's handling of the crisis propelled him to the Treasury and to the position of Britain's dominant minister for the following two decades. The crash left a lasting suspicion of joint-stock companies, chilled the development of British corporate finance for a generation, and fixed the word "bubble" in the financial vocabulary.
Location: London, England