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Terms under which this service is provided to you. This article is about the term as it is used in the jargon of bourses. The collateral for a margin account can be the cash deposited in the account or securities provided, and represents the funds available to the account holder for further share trading. On United States futures exchanges, margins were formerly called performance bonds.

A margin account is a loan account by a share trader with a broker which can be used for share trading. The funds available under the margin loan are determined by the broker based on the securities owned and provided by the trader, which act as collateral over the loan. If the cash balance of a margin account is negative, the amount is owed to the broker, and usually attracts interest. If the cash balance is positive, the money is available to the account holder to reinvest, or may be withdrawn by the holder or left in the account and may earn interest. 10 or more, either by selling the share or repaying part of the loan. Margin buying refers to the buying of securities with cash borrowed from a broker, using the bought securities as collateral.

This has the effect of magnifying any profit or loss made on the securities. The securities serve as collateral for the loan. The net value—the difference between the value of the securities and the loan—is initially equal to the amount of one’s own cash used. In the 1920s, margin requirements were loose. In other words, brokers required investors to put in very little of their own money. 10 or more, either by buying the share back or depositing additional cash. Short selling refers to the selling of securities that the trader does not own, borrowing them from a broker, and using the cash as collateral.

This has the effect of reversing any profit or loss made on the securities. The initial cash deposited by the trader, together with the amount obtained from the sale, serve as collateral for the loan. The current liquidating margin is the value of a security’s position if the position were liquidated now. The variation margin or mark to market is not collateral, but a daily payment of profits and losses. Futures are marked-to-market every day, so the current price is compared to the previous day’s price. The profit or loss on the day of a position is then paid to or debited from the holder by the futures exchange.

The seller of an option has the obligation to deliver the underlying of the option if it is exercised. To ensure they can fulfill this obligation, they have to deposit collateral. This premium margin is equal to the premium that they would need to pay to buy back the option and close out their position. Additional margin is intended to cover a potential fall in the value of the position on the following trading day. This is calculated as the potential loss in a worst-case scenario. SMA and portfolio margins offer alternative rules for U. This requires maintaining two sets of accounts, long and short.

Example 1 An investor sells a put option, where the buyer has the right to require the seller to buy his 100 shares in Universal Widgets S. The initial margin requirement is the amount of collateral required to open a position. Thereafter, the collateral required until the position is closed is the maintenance requirement. The maintenance requirement is the minimum amount of collateral required to keep the position open and is generally lower than the initial requirement. This allows the price to move against the margin without forcing a margin call immediately after the initial transaction. If this results in the market value of the collateral securities for a margin account falling below the revised margin, the broker or exchange immediately issues a “margin call”, requiring the investor to bring the margin account back into line. If a margin call occurs unexpectedly, it can cause a domino effect of selling which will lead to other margin calls and so forth, effectively crashing an asset class or group of asset classes.

The “Bunker Hunt Day” crash of the silver market on Silver Thursday, March 27, 1980 is one such example. Stock Equity being the stock price multiplied by the number of stocks bought, and leveraged dollars being the amount borrowed in the margin account. So the maintenance margin requirement uses the variables above to form a ratio that investors have to abide by in order to keep the account active. So at what price would the investor be getting a margin call? 66, investors will be called to add additional funds to the account to make up for the loss in stock equity.