Mississippi Bubble

The Mississippi Bubble was a parallel and equally destructive speculative crash that gripped France in 1720. The Mississippi Company, chartered to trade with Louisiana, promised legendary riches from the American frontier. Orchestrated by the Scots financier John Law, the scheme inflated spectacularly before collapsing, ruining the finances of the French Crown and leaving a generation scarred by the memory of paper wealth evaporating into nothing.

John Law and the Banque Générale

John Law was a Scots financier and mathematician who had fled Britain after killing a man in a duel. He found his way to France, where he presented himself to the Regent, Philippe d’Orléans, with an audacious idea: a bank that would issue paper notes backed by the credit of the state. This was revolutionary. At the time, money meant physical gold or silver; the idea of pure paper wealth, valuable only because the Crown said so, was almost unthinkable.

The Regent, desperate to finance the Crown’s debts from the wars of Louis XIV, was receptive. In 1716, Law founded the Banque Générale. He promised that banknotes would be redeemable on demand for gold coin. In practice, the bank printed far more notes than it could back with specie — a form of leverage and gambling that would reappear in every financial crisis that followed.

The Mississippi Company and the consolidation

Law’s next move was even bolder. He convinced the Regent to grant him a monopoly on trade with Louisiana and the Mississippi Valley. In 1717, the Mississippi Company was chartered with the promise of untold riches from the American frontier — gold, furs, timber, and commerce on an unimaginable scale. Law amalgamated various trading companies and then in 1719 consolidated all his ventures, including the Banque Générale, into a single corporation: the Mississippi Company.

He offered the Crown a deal: the company would assume much of the French Crown’s debt, just as the South Sea Company had done in England. Share prices began to climb. The Crown — on Law’s advice — lowered interest rates on government debt, which pushed investors toward the higher-yielding (and more speculative) Mississippi shares.

The mania and inflation

Through 1719 and into 1720, Mississippi shares soared. Ordinary Parisians sold property and borrowed to buy shares. The narrow street of Rue Quincampoix, where shares were traded, became so crowded that people stood four abreast from dawn to dusk. A contemporary account reported that a hunchbacked woman could make 50,000 livres a day simply by renting her hump as a writing desk for traders to sign contracts.

The company’s stock rose from around 500 livres per share to 10,000. Paper wealth exploded. The Banque Générale’s notes flooded the economy. Prices for goods soared — wages did not keep pace. Inflation became rampant. Law became the richest man in France, celebrated as a genius.

But the underlying economics were fiction. Louisiana produced no gold. Trade did not materialize at the promised scale. The Banque Générale’s reserve of specie was tiny against its note circulation. Insiders began to exchange notes for gold coin and sell their shares. The illusion was unsustainable.

The collapse and its sequelae

In 1720, the company’s shares began to fall. As they fell, holders of banknotes rushed to redeem them for gold, but there was not enough gold. The bank began refusing redemption in specie, paying instead in promissory notes — pieces of paper backed by nothing. Confidence evaporated overnight.

By December 1720, Mississippi shares had fallen 99% from their peak. The Regent was forced to admit the scheme had failed. Law, once lauded as a financial genius, was now reviled as a charlatan and a thief. He fled France in disguise in 1720 and died in exile in Venice in 1729.

The financial impact on France was severe. The Crown’s debt crisis, which the scheme was meant to solve, was now worse. Confidence in paper money was shattered for decades. The Banque Générale was shuttered. French finance never fully recovered its standing until long after Law’s death.

Legacy: The first true inflation crisis

The Mississippi Bubble is remembered as the first modern financial crisis involving the inflation of a paper currency. It showed that you could not simply create wealth out of thin air — that the quantity of money in circulation had to be anchored to something real, or inflation would eat away the purchasing power of every note in circulation. It also established John Law as a cautionary figure: the brilliant schemer whose leverage and overconfidence destroy not just himself but an entire nation’s finances.

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