[throwaway7ahgb]

You can also just say things you don't understand are always created by fools.

Now, there are some fools buying these stocks. But to say that each one of these has a high P/E because every shareholder is a fool is very reductionary.

[adwn]

> You can also just say things you don't understand are always created by fools.

Do you have a better hypothesis that would explain the extreme valuations of those stocks?

> But to say that each one of these has a high P/E because every shareholder is a fool is very reductionary.

That's not what "greater fool theory" means.

[wordpad25]

> Do you have a better hypothesis that would explain the extreme valuations of those stocks?

This isn't crypto, these are real, well run companies with good fundamentals.

The trade may be a bet that they are able to corner the market and extract more value. Maybe, it's wrong, but doesn't mean it's just empty hype.

[adwn]

> these are real, well run companies with good fundamentals

I'm not disputing that. But even "real" companies don't warrant P/E multiples in the three-digit range, unless there's a very good reason to expect them to grow their profits by 10x or more in the foreseeable future – and that has to be the expected value of earnings growth (roughly, the average growth over all possible futures), discounted by the time value of the investment.

P/E multiples over 100 are practically never justifiable, except as "someone else will come along and pay even more" – i.e., the greater fool theory.