Share your insights or perspective on the financial matter presented in the input.

Is it possible for all the owners of a stock to gain or lose money at the same time?
I'm not sure I understand your question. If the stock price is at an all-time high, everyone who owns the stock is 'in the money'. Of course, they won't actually realise a capital gain until they sell the stock. Similarly, if the stock becomes worthless (the company shuts down after declaring bankruptcy, etc.), everyone who owns the stock is out whatever they paid for the stock.