Buying on margin refers to the practice of buying securities where clients pay only certain percentage of the securities’ value and borrow the rest from CNI.  Margin has the function of Leverage. Assume the client is using 1X Leverage, if the stock price increase 25 % at the same time the margin value will increase 50%, however, as the stock price reduce 25%, the margin value will  also reduce 50%, therefore, we will recommend client with better risk manage ability to use margin trading.