Typing 101 teaches the fundamental need for margins in the written word. Without these margins, we would have a page filled with run on words which would become difficult to not only read but understand. No delineation causes us to loose the flow and tone of the written word. Margins and paragraphs are a necessary tool in understanding the written word. Look at this story below as if it is on one page and the first letter on the left is at the edge of the paper and the last letter on the right is at the other edge. The story takes on a flat monotone.
There is an interesting concept in the financial world of Margin Trading. Investors are allowed to buy stocks based upon a percentage of the assets they currently hold. Investors are borrowing the funds to buy a stock based upon the assets the brokerage firm holds for them. They are borrowing the funds from the brokerage house and will pay interest on the investment.