# Reserved stocks

Reserved stocks are used to refresh the reserved quantities associated with a specific [stock item](https://docs.commercelayer.io/core-api-reference/stock_items). They are automatically generated as part of the [stock reservations](https://docs.commercelayer.io/core-api-reference/stock_reservations) workflow and cannot be created manually.

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Stock item's reserved quantities determine the actual availability of an SKU in a stock location. You can include them as a [relationship path](https://app.gitbook.com/s/-LgByaSP8eKjad-MIuHE/including-associations#using-relationship-paths) when fetching a list of SKUs (or a single one) to check their [real-time stock availability](https://docs.commercelayer.io/core-api-reference/skus#checking-real-time-stock-availability) (additional computation on your side is required).
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{% hint style="info" %}
This is an **immutable API**, meaning that create, update, and delete operations are not allowed on this endpoint. You can only fetch a list of reserved stocks or a single reserved stock object.
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