Margin requirement in trading refers to the amount of money that a trader must deposit with a broker or an exchange to cover some or all of the credit risk the holder poses for the broker or exchange while their trade is active.

Essentially, it is a deposit required to maintain open positions in the market.

The margin requirement allows traders to hold positions larger than the amount of money they have in their account, similar to the concept of leverage.

It is typically expressed as a percentage of the total value of the position.

For example, if a trader wants to buy $100,000 worth of a certain asset and the margin requirement is 1%, they would need to have at least $1,000 (1% of $100,000) in their trading account as a margin.

This amount acts as collateral or security for the broker in case the market moves against the trader’s position.

Margin requirements are determined by various factors, including market conditions, the type of asset, and regulations of the exchange or regulatory authority.

Different brokers can also have different margin requirements.

It’s important to note that trading on margin amplifies potential profits, but also potential losses.

If the market moves against a trader’s position and they don’t have enough money in their account to maintain the margin requirement, they will receive a margin call, which is a demand from their broker to deposit additional funds.

If the trader can’t meet the margin call, the broker has the right to close out any open positions to bring the account back up to the minimum value.