I could drop the market cap of Google down to $3.4M right now. All I have to do is sell one of my shares for $0.01. The thing is, it would pop right back up again to $483B within a few milliseconds, and I'd just be out $690, so there's kinda no point to it.
(Pedantic note, since I know there's gonna be someone in the financial industry that corrects me: no, I couldn't, technically. When I put in a sell order, it goes into the order book, and buyers are required by law to take the best offer, which is probably more than mine. I'd have to place my order at a time when there are no outstanding limit offers. This has actually happened during flash crashes and technical glitches, but is not a normal occurrence.)
Privately traded companies are similar, but because there's less liquidity, the price doesn't necessarily correct on any reasonably time scale.
http://blog.samaltman.com/the-tech-bust-of-2015
I could drop the market cap of Google down to $3.4M right now. All I have to do is sell one of my shares for $0.01. The thing is, it would pop right back up again to $483B within a few milliseconds, and I'd just be out $690, so there's kinda no point to it.
(Pedantic note, since I know there's gonna be someone in the financial industry that corrects me: no, I couldn't, technically. When I put in a sell order, it goes into the order book, and buyers are required by law to take the best offer, which is probably more than mine. I'd have to place my order at a time when there are no outstanding limit offers. This has actually happened during flash crashes and technical glitches, but is not a normal occurrence.)
Privately traded companies are similar, but because there's less liquidity, the price doesn't necessarily correct on any reasonably time scale.