(and if you can't sell assets, that's the only valid metric for valuation - "I need that thing and would have built it anyway". Even if it's complimentary to your existing business - the BATNA is "build it myself".)
extremely controversial (if not outright incorrect) statement to be labeling as "traditional wisdom". Says who?Probably not any economics textbook written in the last century.
I didn't write anything controversial and you don't need to consult an economics textbook, a basic Investopedia article will do:
From Investopedia:
https://www.investopedia.com/articles/fundamental-analysis/1...
"The dividend discount model (DDM) is one of the most basic of the absolute valuation models. The dividend discount model calculates the "true" value of a firm based on the dividends the company pays its shareholders."
An alternative model if there is no dividends:
"the Discounted Cash Flow model uses a firm's discounted future cash flows to value the business. "
The ability of a firm to sell itself to a foreign firm is not a factor is valuing the firm.
I wouldn't use these models to value a Pikachu trading card, but this is stock market 101 type stuff.