The South Sea Bubble of 1720

This year marks the 300th anniversary of one of the most famous financial crashes in history: the ‘bursting’ of the South Sea Bubble in 1720. Contemporaries spoke of a strange madness that had overwhelmed London, a financial frenzy of investment unlike anything ever witnessed before.

The writer Jonathan Swift, who had initially championed the South Sea Company scheme, was one of the hundreds around the country who lost significant fortunes, from lords and ladies to humbler folk with life savings. He captured the confusion and chaos of the times:

‘Thus, the deluded Bankrupt raves;
Puts all upon a desp’rate Bet
Then plunges in the Southern Waves
Dipt over Head and Ears – in Debt.’ 1

Some forms of our modern financial markets had been established in London since the 1690s, when the government had sought out new ways to raise money to resource the Nine Years’ War (1688-1697). The Bank of England had been established in 1694, creating the very first national debt, and had begun issuing Bills of Exchange: paper notes with a ‘promise to pay’ (the same words found on our banknotes today). There was a growth in lotteries, annuities, joint-stock companies, insurance firms and all manner of money-making schemes as well as an increase in financial news and investments from overseas, particularly from Amsterdam and France. The City of London grew richer and more powerful. 

A page from a book titled A Scheme for Making Two Million Pounds.
A Scheme for Making Two Million Pounds. Catalogue ref: T 98/2, f 391

In 1713, Britain secured the rights to supply slaves to Spanish America as part of the Treaty of Utrecht, a series of agreements between European powers concluding the War of Spanish Succession. This was deemed a coup for Britain, because there were huge profits to be made by trading with the gold and silver-rich South American colonies located from the Orinoco river down to the Tierra del Fuego. In return, the Spanish would gain access to all the British forts along the West Coast of Africa, controlled by the Royal African Company.

Handwritten document by Hopton Haynes titled ‘Report on gold from the West Indies brought to the Mint by the South Sea Company’.
Hopton Haynes, ‘Report on gold from the West Indies brought to the Mint by the South Sea Company’. Catalogue ref: MINT 19/1, item 108

The South Sea Company was a joint-stock company set up in 1711 with a view to exploiting these new markets and to balance the power of the Whig-controlled Bank of England by furthering Tory political and commercial influence. It was devised by the Scottish trader, William Paterson, and was founded by the financier and former lottery promoter, John Blunt, and the new Lord Treasurer, Robert Harley. The Company arranged to buy the monopoly contract or ‘asiento’ for the Spanish South Sea trade from the British government for around £9,500,000, in return for taking on a substantial amount of Britain’s national debt.

George I’s subscription to South Sea Stocks.
George I’s subscription to South Sea Stocks. Catalogue ref: T 52/30, f 275

There was a great deal of political investment in this scheme, as well as general public excitement. This was a new way of seeing and handling money, in which the Crown and its people might both ‘get rich quick’. The King himself even bought stocks. The antiquary and natural philosopher William Stukeley recorded in his ‘Memoirs of Sir Isaac Newton’s Life’ (1752) the ‘Suprizeing Scene in Change Alley’ when ‘Nobility, Ladys, Brokers, footmen’ all scrambled as equals in the sale of these shares 2. In June 1720, John Blunt was made a Baronet in recognition of ‘his extraordinary services in raising public credit to a height not known before.’

John Blunt made a Baronet. Catalogue ref: T 52/30, f 352

But the incredible trade and profits promised by the Company never fully materialised, and it began to act almost exclusively as a kind of bank. It lent money to potential purchasers, which kept up the demand for its stock and artificially inflated its price – creating the ‘bubble’. More than twice the amount of stock available was sold to an eager public, and the money coming in from these new investments was used to pay out fantastic amounts to older investors – some have described it as a pre-modern Ponzi scheme.

By the end of April 1720, stock was selling at almost £350, then nearly £600 by the end of May, and £950 by the end of June. The overinflated share prices then peaked at around £1050, before suddenly dropping to £190 (below their original value) in the late summer, and then dipping even further to £124 in December 1720. The South Sea Bubble had well and truly burst.

An illustration by William Hogarth titled 'The South Sea Scheme: speculators ruined by the collapse of the South Sea Company' (1721).
William Hogarth, ‘The South Sea Scheme: speculators ruined by the collapse of the South Sea Company’ (1721): freely available under Creative Commons License from Wellcome Library

That September, Stukeley wrote that ‘the World [was] in the utmost distractions, thousands of families ruined’. One of the most striking things about the crash was that it hit nearly every level of society, particularly elite individuals and institutions who had invested great amounts, often more than once. The Royal Society lost around £600 and many of its Fellows, including Isaac Newton, took a hefty hit to their private accounts. But the crash was not ruinous for all. The stationer, Thomas Guy, for example, sold his shares at £600 each and won so much money he was able to establish a new hospital in 1721: Guy’s Hospital in Southwark.

Nevertheless, the public outrage was so strong that there was a parliamentary inquiry into the causes of the crash, which uncovered evidence of insider trading and bribery. Several company directors were punished, including prominent Cabinet members. They were impeached and had their estates confiscated to remunerate investors, and the remaining shares were allocated to the East India Company and the Bank of England. The Chancellor of the Exchequer, John Aislabe (who had been given £20,000 of company stock in exchange for his political support) was removed from power and imprisoned in the Tower of London. It was only through deft political manoeuvring that Robert Walpole, the newly appointed First Lord of the Treasury, was able to soothe the public and limit the damage to Crown and City.

John Crookshanks, ‘The Wrong Methods and Mistakes in the State of the National Debts’. Catalogue ref: T 98/2, f 356

The bursting of this bubble – combined with similar contemporaneous events in France and in the Low Countries – sparked much public debate on the values and dangers of speculation and new financial technologies. It prompted calls for increased scrutiny of unregulated markets, government practices and potential corruption. Ultimately, however, Georgian society went on without much change, and the South Sea Company itself continued to operate until 1853. At least now, though, there was a public awareness of just how complicated and capricious the markets could be.

Dr Alice Marples is Research Associate for The Newton Project working on Sir Isaac Newton’s papers as Master of the Royal Mint.


  1. David Langshaw says:

    Not sure I like the use of the word “won” in relation to Thomas Guy!

  2. Kenneth Peel says:

    To Alice Marples: Thank you for this interesting overview and information! Last June I made enquiries of the LSE Library, but they were at that time closed & unable to help. Can you offer any guidance or assistance: have you access to a copy of the ‘notebook of subscribers’ lists? My original inquiry follows: “inquiry about an archives item – Good day; in doing some research my wife noted an item in the LSE Library Archives:
    SR 0083 – South Sea Company: notebook of subscribers, 1720

    Is there any possibility of obtaining a legible pdf of this ‘notebook of subscribers’? Alternatively, we are particularly interested in determining whether the list of subscribers contains 2-3 certain names pertinent to our work. We have no idea whether the list is organized in an orderly alphabetical way or randomly or by date of subscription. We could supply the names to check, if that’s the best way of proceeding…”.
    Are you aware of any accessible electronic copy? Thanks very much.

  3. Echlin says:

    You could try the British Library, which has South Sea records and the House of Lords Record Office has some subscription books. Also the Guildhall Library may have something.

    Generally, the South Sea adventure and its immediate predecessor, the Mississippi scheme, were the models for so many similar frauds – Enron comes to mind.

    Defoe was an early critic of the fraudulent activities of stock-jobbers and the invention of new schemes to get the gullible to part with their money.

    My favourite critic of the bubble schemes was William Chetwood who wrote some prescient satires on the frauds and I especially like his “Exchange Alley, or, The Stock-jobber turned Gentleman … etc”.

    Chetwood has the promoter, Bubble, propose schemes for insuring ships to the moon, a fleet of flying ships, and insuring people’s noses from the risk of fire. He tells the subscribers that the moon is in fact a pleasant country: “The pleasantest climate in the world, sir. When I was last there at Christmas, the meadows were beautifully green and odoriferous, and the corn almost in its full perfection of ripeness.”

    Perhaps that promoter was merely a little before his time.

  4. Viv Edwards (Marlee’s father in law!) says:

    Thank you Alice, this is fascinating. Here I am, 300 years later, tutoring bankers in Professional Conduct and Ethics. Despite improvements in legislation and regulation evidence of greed and corporate corruption still pervades.

  5. Elizabeth Lowry says:

    Are the inventories/ sales of goods of bankrupts from the Bubble available in the PRO?

  6. Mr. Robert Ward says:

    And here we are again, where the Bitcoin ordure has hit the fan. People will never learn that the only way to a better life is to work for it.

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