Unfortunately it is impossible for the FIFO stock valuation to change unless the stock is moved in with a new cost price.
The FIFO Valuation is the physical stock value as it was when it was moved into the system.
There is no way for the FIFO method to decrease or increase the value of the stock record/sub-analysis without moving the entire physical stock out and back in again with the new price/value wanted.
It is best to use the latest valuation as this reflects the current value without the need to move all the stock out and back into the system at the new price.
Make the cost price change reflect on FIFO stock valuation report
Updated over a week ago