If the volume of sell orders gets too high, the exchange shuts down trading in that stock.
If it's high but not "too high" then the price they all get will be significantly less than what they expected.
My question is: how do you know that?
Date Open High Low Close* Adj Close* Volume
Oct 28, 2022 99.58 100.85 97.51 99.20 99.20 95,728,200
Oct 27, 2022 97.98 102.50 96.38 97.94 97.94 232,316,600
Oct 26, 2022 131.68 135.55 128.53 129.82 129.82 82,791,500
Oct 25, 2022 130.88 138.35 130.59 137.51 137.51 38,433,200
Exchanges have a collection of their participant's bids ("I will buy for this price") and offers ("I will sell for this price"). When a bid is matched with an offer, the transaction goes through.
Now this is the important part - there are only so many people willing to buy for $300. If there is a mass sell off, all those offers are consumed, and the exchange starts filling the offers of people who would buy for $299.99 (or whatever the next lowest price is). Once those offers are consumed, further down the price ladder we go.
That alone will ensure that not all sellers are getting top dollar, however a market selloff like that would trigger a cascade of lower prices (buyers withdrawing their bids and relisting at a lower price, or not relisting at all), along with things like stop losses and algorithms getting triggered.
> If they all tried to exit at the top
Assuming that "they all" means "the vast majority of shareholders", then sell pressure would be higher than buy pressure by definition, and the price would drop.
If there was enough buy pressure to absorb the sell pressure, then we're in a scenario where half or less of the shareholders are trying to exit.
If you own an oil well and pay out a ton of employees to try a new extraction method which causes a fire - the actual value of your asset has been destroyed. And a lot of money has also been transferred from investors to employees. The embarrassment may also cause you to lose trust of other companies which hurts the value of future contracts. Some of the value you destroyed is gained by other companies since they can now sell their product for more - but the shareholder value of the well you own is lost.
I agree Facebook's value has a speculative element to it - but its pretty clear that the money has been lost because the thing of value has been partially destroyed both by itself and by competitors like Apple and TikTok which is stealing its revenue.
Cash value is realized upon liquidation. Before that, it’s just paper.
Of course it was. You can debate how much of it was speculative but even in tech its not all made up.
It is conventional to describe a loss of value in both cases, but the second kind is much more obviously hypothetical than the first kind.
I agree there is more speculation but overall its cash flow went down a lot and thats not that speculative.
It went back to where it came from: nowhere. Market cap is a completely made up concept in the first place.