6.3 billion percent: the Mobutu-era hyperinflation

The Democratic Republic of Congo's price charts for the early 1990s capture one of the most extreme hyperinflations in modern economic history: IMF research on what was then Zaire found that cumulative price increases reached 6.3 billion percent between October 1990 and December 1995, as President Mobutu Sese Seko's government financed collapsing tax revenues and a disintegrating political system by printing money through the central bank, while the currency lost nearly all of its value on parallel foreign-exchange markets. The roots were political as much as monetary: opposition movements derailed Mobutu's gradual liberalization plans in the early 1990s, state institutions crumbled, and by 1993 the government had largely lost the ability to collect revenue, leaving monetary financing of the deficit as one of the only levers left. Multiple currency redenominations through the decade failed to restore confidence, and conditions worsened further once the First Congo War of 1996-97 and then the Second Congo War of 1998-2003 engulfed the country, delaying any durable stabilization until a new currency, the Congolese franc, and IMF-backed reforms began to take hold in the early 2000s.