Base date - Financial definition
Concise definition of the term base date
In finance, the term base date designates the date against which the performance of an index is measured.
Comprehensive definition of the term base date
In most cases, this value, called base value, is set to a round number such as 100 or 1000.
Let’s for example consider an index with a base date July 1st, 2010 and a base value of 1,000. If the index value is 1,600 on July 1st 2020, that means that the value of the index has increased by 60% over this period of 10 years.