The Mississippi Company was a corporation holding a business monopoly in French colonies in North America and the West Indies. In 1717, the Mississippi Company received a royal grant with exclusive trading rights for 25 years. The rise and fall of the company is connected with the activities of the Scottish financier and economist John Law who was then the Controller General of Finances of France. Though the company itself started to become profitable and remained solvent until the collapse of the bubble, when speculation in French financial circles and land development in the region became frenzied and detached from economic reality, the Mississippi bubble became one of the earliest examples of an economic bubble.

John Law was a Scottish-French economist who distinguished money, a means of exchange, from national wealth dependent on trade. He served as Controller General of Finances under the Duke of Orleans, who was regent for the juvenile Louis XV of France. In 1716, Law set up a private Banque Générale in France. A year later it was nationalised at his request and renamed as Banque Royale. The private bank had been funded mainly by John Law and Louis XV; three-quarters of its capital consisted of government bills and government-accepted notes, effectively making it the nation's first central bank. Backed only partially by silver, it was a fractional reserve bank. Law also set up and directed the Mississippi Company, funded by the Banque Royale. Its chaotic collapse has been compared to the 17th-century tulip mania parable in Holland. The Mississippi bubble coincided with the South Sea bubble in England, which allegedly took ideas from it. Law was a gambler who would win card games by mentally calculating odds. He propounded ideas such as the scarcity theory of value and the real bills doctrine. He held that money creation stimulated an economy, paper money was preferable to metal, and dividend-paying shares a superior form of money. The term "millionaire" was coined for beneficiaries of Law's scheme.