You buy fifty shares of stock, costing, say, fifty dollars a share." "That would be twenty-five hundred dollars." "Yes, if you bought it right out.

But you don't.

You give the broker whatever per cent.

he requires, say a dollar a share--most of them don't do it so cheap--and he buys the stock on your account.

If it goes up one or two points, say to fifty-one or fifty-two, he sells out, and the profit goes to you, deducting twenty-five cents a share which he charges for buying and selling.