Definition: This is the % of days the product was in stock in the time period chosen.

Note: If you aggregate products this becomes the % of days at least 1 product in the category/brand was in stock

Equation: unique in stock days/day count

Example: % Days in stock can be looked upon if sales for a product weren't so good the last 60 days. Take the snip below, the retailer can see that a Subx product only was in stock 4.9% out of the last 60 days, while the other highlighted Canna Whupass product was in stock 100% of the days. If that Canna Whupass had a lot more sales than the Subx product, it would most likely be due to the lack of inventory.