Hyperinflation is also known as runaway inflation or galloping inflation. This type of inflation occurs during or soon after a war. This can usually lead to the complete breakdown of a country’s monetary system. However, this type of inflation is short-lived. In 1923, in Germany, inflation rate touched approximately 322 percent per month with October being the month of highest inflation

Hyperinflation is largely a twentieth-century phenomenon. The most widely studied hyperinflation occurred in Germany after World War I. The ratio of the German price index in November 1923 to the price index in August 1922—just fifteen months earlier—was 1.02 × 1010. This huge number amounts to a monthly inflation rate of 322 percent. On average, prices quadrupled each month during the sixteen months of hyperinflation.

In economics, hyperinflation is inflation that is very high or "out of control", a condition in which prices increase rapidly as a currency loses its value.[1] Definitions used by the media vary from a cumulative inflation rate over three years approaching 100% to "inflation exceeding 50% a month." [2] In informal usage the term is often applied to much lower rates. As a rule of thumb, normal inflation is reported per year, but hyperinflation is often reported for much shorter intervals, often per month.

The definition used by most economists is "an inflationary cycle without any tendency toward equilibrium."[citation needed] A vicious circle is created in which more and more inflation is created with each iteration of the cycle. Although there is a great deal of debate about the root causes of hyperinflation, it becomes visible when there is an unchecked increase in the money supply (or drastic debasement of coinage) usually accompanied by a widespread unwillingness to hold the money for more than the time needed to trade it for something tangible to avoid further loss. Hyperinflation is often associated with wars (or their aftermath), economic depressions, and political or social upheavals.