"Last value" is pretty meaningless when it's stale though.

Suppose there is a building that was built in 1970, last rented out in 1975 and then bought by a company that has used it as their own offices until now. The last transaction was in 1975, what's the value if they apply for a mortgage today? Surely they have some formula to use for this based on e.g. other buildings in the area.

Moreover, "failure to find a tenant" is also a type of transaction. It's the landlord acting as the high bidder for the space, essentially the involuntary edition of imputed rent, and implies something negative about the financial prospects of the building when it continues for a significant period of time or large percentage of units. Ignoring that it is either incompetence or some kind of perverse incentive.

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embedding-shape an hour ago | parent [-]

> "Last value" is pretty meaningless when it's stale though.

For who and in what way though? Every entity involved wants to keep the price high, except the renter/new buyer, so with that in mind, "Last Value" seems optimal for achieving that.

Maybe it's different in the US, but in Spain there is a ton of properties that sit completely empty and unused, even since earlier than 2008, just because the owners don't think the value is enough to sell yet, and they wouldn't earn enough renting it out, so everyone (except renters/new buyers) seems to prefer it just sits empty for decades.

	▲	AnthonyMouse an hour ago \| parent [-]
		> For who and in what way though? For anyone who wants an accurate accounting. Suppose the building is supposed to be worth $20M, has an existing $10M mortgage and is actually only worth $10M. The landlord comes to you and wants to borrow another $5M against the building. Pretty important to the lender at this point that they're not overvaluing it, right? Or the same if they go to a different bank trying to refinance an existing mortgage they're already underwater on when using an accurate accounting.