Cost-of-Living Adjustment (COLA): A COLA is a type of indexing clause that adjusts payments, such as wages or social security benefits, to account for changes in the cost of living as measured by an index like the Consumer Price Index (CPI).
Escalator Clause: An escalator clause is a type of indexing clause that automatically increases the value of a payment, such as rent or a loan payment, based on changes in an index like the CPI.
Deflation:Deflation is a sustained decrease in the general price level of goods and services, which can lead to a decrease in the real value of payments unless they are indexed to an appropriate measure of inflation or deflation.