JOHN FIALA, BALTIMORE, MARYLAND: Hello, my name is John Fiala, and I'm from Baltimore, Maryland. I've been wondering for a long time who or what group of people make the stock prices go up or down, because it's not me.</s>JASON ZWEIG, COLUMNIST, "MONEY": Well, John, I beg to differ. It actually is you. You may not realize it, but you and at least 85 million other American investors just like you are the kinds of people who make the stock market go up and down every day. Now, your trade today is not probably going to be enough to make the stock market go up and down by itself, but it's the trades that you make combined with the trades of all the other investors out there that make stocks move up and down.
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