Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Did an additional $32 billion necessarily get invested into Amazon.com stock on October 26th, 2017?
No, a jump in market capitalization does not equal the amount that has been invested.  Market cap is simply the stock price times the total number of shares. This represents a theoretical value of the company. I say "theoretical" because the company might not be able to be sold for that at all.  The quoted stock price is simply what the last buyer and seller of stock agreed upon for the price of their trade. They really only represent themselves; other investors may decide that the stock is worth more or less than that.  The stock price can move on very little volume. In this case, Amazon had released a very good earnings report after the bell yesterday, and the price jumped in after hours trading. The stock price is up, but that simply means that the few shares traded overnight sold for much higher than the closing price yesterday.  After the market opens today and many more shares are traded, we'll get a better idea what large numbers of investors feel about the price. But no matter what the price does, the change in market cap does not equal the amount of new money being invested in the company. Market cap is the price of the most recent trades extrapolated out across all the shares.