Currency appreciation is when one currency in a forex pair increases in value relative to the other currency in the pair. Forex traders often talk about one currency ‘strengthening’ in relation to another, meaning that it would cost more to buy, or that it can buy more of another currency when sold.

Crystallization is the term used when a trader or business closes a position and then reopens an identical position immediately.

CPI stands for the consumer price index, an average of several consumer goods and services that are used to give an indication of inflation.

A covered call is when a trader sells (or writes) call options in an asset that they currently have a long position on. They are also known as buy-writes.