South Sea Company: Government Debt and a Bubble
In January 1711, Britain's government owed money that its departments had borrowed piecemeal while wars strained public finances. The South Sea Company emerged from that pressure, offering creditors company shares in exchange for government debt. Its name pointed toward distant seas and commercial opportunity, but its first business was close to home: consolidating the national debt and reducing its cost. Before investors chased the soaring stock of 1720, the enterprise connected public borrowing to private ownership through a promise of government-funded dividends.
Robert Harley had become Chancellor of the Exchequer in August 1710. The government depended on the privately owned Bank of England, and Harley was seeking another way to improve its finances. A new Parliament met in November, facing the costs of the War of the Spanish Succession and the Great Northern War. Rather than borrowing through a single coordinated arrangement, departments raised money independently whenever they needed it. Harley gradually released details of debts and expenditure, and the House of Commons appointed an investigating committee in January 1711. It found government obligations totaling £9 million without specifically allocated income to pay them off.
Harley and John Blunt designed the South Sea Company around an exchange. Creditors would surrender their government obligations and receive shares carrying the same nominal value. The government, in turn, would pay the company £568,279 annually, covering interest and expenses. Shareholders would receive dividends from that payment. This made the government payment central to the enterprise's finances, even as overseas trade attracted attention.
Advance knowledge of the plan offered another route to profit. Before its announcement, doubts about full repayment had pushed government debt below its nominal value. An obligation worth £100 on paper could be bought for £55. Once the conversion became public, repayment at nominal value looked more certain, and the debt's value could recover. Those who bought ahead of the announcement stood to gain from the change. Harley drew financial supporters into the scheme through that prospect, including James Bateman and Theodore Janssen. The opportunity rested on knowing when debt would be consolidated, rather than on successful commerce across the Atlantic.
The South Sea Company's trading privileges faced barriers that its financial design could not remove. Britain was at war with Spain, which controlled the South American commerce the company hoped to enter. In 1713, the Treaty of Utrecht granted an Asiento de Negros, a monopoly involving the transport of enslaved Africans to Spanish colonies. A limited ship carrying general merchandise was also permitted. The company's commercial ambitions therefore depended on treaty restrictions and a business built on human enslavement. Spanish colonial authorities initially refused to accept the agreement, which had not been officially confirmed there. The enslaved people were eventually sold at a loss in the West Indies.
Other trading disappointments followed. A ship sent to Cartagena in 1714 carried woolen goods despite warnings that there was no market for them; the merchandise remained unsold for years. Import duties also burdened the trade in enslaved people. A 2021 study found that Asiento slave trading contributed materially to shareholder returns. Nevertheless, promoters emphasized the potential wealth of South American trade as the company expanded its dealings in government debt. Expectations of commercial gains helped attract share buyers even while the trading business struggled. The public could buy into the prospect of overseas riches, although the company's demonstrated financial activity centered on the obligations it had taken over.
Speculation gathered force through the South Sea Company's own operations. Company money went into trading its shares, and selected purchasers received cash loans secured by those shares to buy more stock. Politicians received large bribes to support the parliamentary measures the scheme needed. The company also promoted the Bubble Act, which prohibited the creation of joint-stock companies without an act of Parliament or a royal charter. Its share price reached a peak in 1720 before collapsing to little above its original flotation price. Thousands of investors were ruined.
Parliament investigated the collapse and the people who had benefited unlawfully. Some politicians were disgraced, and personal assets were confiscated in proportion to unlawful gains. Many participants had been wealthy before the scandal and remained wealthy afterward. The company was restructured and continued operating for more than a century, with headquarters on Threadneedle Street in London's financial district. Its rival, the Bank of England, was also a private company dealing in national debt. After the crash, that bank's position as banker to the British government was confirmed.