The man who taught half of Wall Street how to value a company says almost none of them actually do it, and that shortcut is priced into everything you own. The number on your screen is not the truth. It is not what the business is worth. It is a mood, and mistaking one for the other is how most investors quietly go broke.
His name is Aswath Damodaran. He teaches valuation at NYU, and the analysts who set price targets quote him like scripture. He has priced Tesla, Apple, and half the market in public, with his work shown.
His whole argument fits in one line. A stock has a value and a price, and they are not the same thing. Value comes from the cash a business will actually produce. Price comes from what the crowd feels today.
For long stretches they drift apart. A story lifts the price while the cash says otherwise, and it can stay wrong for years before it snaps back.
Most people never separate the two. They buy a rising number, call it investing, and never once ask what the thing is truly worth.
Damodaran does the opposite. He estimates what a business will earn, discounts it for time and risk, and only then checks the price to see if the market is offering a gift or a trap.
That is the whole game. Not predicting the next move, but knowing the value well enough to act when price and value disagree.
He gives it all away. Every lecture, every spreadsheet, every model sits online for free, because he knows almost nobody will do the work.
The masterclass is under half an hour, free, from the one man Wall Street trusts to tell it what things are worth. Almost nobody watches to the end.