I was just reading a book on the stock market by The Motley Fool(It's quite an old book as the pages are yellow and it was given to me) nothing is really centered about the net. It's all about ordering information packages. Anyway still a pretty cool book. I have been reading it and got to a point where they said that companies issue common stock when they want to make money, though I dont get how that would work? By issuing common stock dont they lower all stock prices to create those extra stocks that they are issuing? If so how is there any gain in money.

Thanks. =)