im wondering the same thing

I see it too, but it’s zero on all the items I looked at. My guess is they added it now and plan to use it in the future.
I hope it will be the number of Reserved items in the fulfillment network that are buyable on the product page. That would differentiate which Reserved Items are customer sales and which ones are still available for sale.

I did not notice this until you posted. For one of my FBA inbound shipments picked up on Friday, inventory is showing those units as inbound as well as “Future Supply Buyable.” For my other inbound shipments picked up early last week, they are only showing under reserved as they have already gone into FC transfer mode.

I believe that it is referring to any units sold by Amazon (possibly as a part of their Global Store) and fulfilled using units out of your inventory - for which you will get paid.

Hi @AmpStewart –

This relates to the expansion of this FBA program:

More info in Amazon Help pages here:

• Products in stock soon? Make them available now
• In-Stock Head Start
  
  

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Update: The inventory that I had in-transit was checked in and received. Now all the inventory shown under FSB has zeroed out and is in FC transfer.