A situation where prices are rising at an extremely rapid and accelerating rate, often exceeding 50% per month, is referred to as

Hyperinflation refers to an extremely rapid, out-of-control rise in prices, conventionally defined as exceeding 50% per month. Stagflation is the simultaneous occurrence of high inflation and high unemployment, deflation is a sustained fall in the price level, and disinflation is a reduction in the rate of inflation.