Exactly. The current stock price is just the last price it traded at, or some measure of supposed liquidity or depth in the market at some price. That liquidity

Exactly. The current stock price is just the last price it traded at, or some measure of supposed liquidity or depth in the market at some price. That liquidity just exists as unfilled orders or quotes on the order book on an exchange and can vanish in an instant. The other thing is that buying stock for a company A isn't the same as "investing in" company A, since company A doesn't get your money...it's a secondary market! As buffet says, the stock market is a voting machine in the short term and a weighing machine in the long-term.