This is why professional investors spend awful lots of money on research into the companies they invest in. They're not stupid.
And speculators don't care about any of that while the line is going up. They're not stupid, they just don't care about the actual health of the company, since today it is almost completely decorellated from its share price.
Look at Tesla and tell me why the investors have not yet fleed the scene, in light of the disastrous signals that keep popping up. Because it doesn't matter to speculators.
Stock buybacks (and dividends issued) are done when the company does not have a better use for the money.
Are you also opposed to dividends?
> when the company does not have a better use for the money.
I think that's nonsense, you can always pay your talent better, invest in new equipment, diversify your offerings...
Not any more than buybacks are.
> I think that's nonsense, you can always pay your talent better, invest in new equipment, diversify your offerings...
None of that automatically means your customer base will grow. Many, many companies fail at attempting just that.
Every shareholder does, because you cannot make a quick buck off of a stock if the other shareholders are looking for the quick buck as well.