- Year-over-year (YOY) is a method of evaluating two or more measured events to compare the results at one period with those of a comparable period on an annualized basis.
- YOY comparisons are a popular and effective way to evaluate the financial performance of a company.
The formula used to calculate the year over year (YoY) growth rate is as follows:
(1) 
,
where
| Year-Over-Year |
| current period value |
| previous period value |