Getting NBV value for a FA asset

Hello! We would like to be able to query NBV (net balance vaue) for any assets of ours.

The closest thing we've found in API is fscmRestApi REST API processTransaction-getAssetInformation which returns among others X_ADJUSTED_COST field. By sampling a few assets we concluded that the field correspond to NBV. However it turns out that the field could return zero value for an asset which has non-zero NBN (when cross-checked in Asset Inquiry UI).

Thus we have following questions:

1. Does X_ADJUSTED_COST value from 'processTransaction-getAssetInformation' method correspond to NBV? If not, what API could we use instead to get one?