Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Margin when entered into a derivative contract
The most obvious use of a collateral is as a risk buffer. Just as when you borrow money to buy a house and the bank uses the house as a collateral, so when people borrow money to loan financial instruments (or as is more accurate, gain leverage) the lender keeps a percentage of that (or an equivalent instrument) as a collateral. In the event that the borrower falls short of margin requirements, brokers (in most cases) have the right to sell that collateral and mitigate the risk.  Derivatives contracts, like any other financial instrument, come with their risks. And depending on their nature they may sometimes be much more riskier than their underlying instruments. For example, while a common stock's main risk comes from the movements in its price (which may itself result from many other macro/micro-economic factors), an option in that common stock faces risks from those factors plus the volatility of the stock's price.  To cover this risk, lenders apply much higher haircuts when lending against these derivatives. In many cases, depending upon the notional exposure of the derivative, that actual dollar amount of the collateral may be more than the face value or the market value of the derivatives contract. Usually, this collateral is deposited not as the derivatives contract itself but rather as the underlying financial instrument (an equity in case of an option, a bond in case of a CDS, and so on). This allows the lender to offset the risk by executing a trade on that collateral itself.