Initial Margin Opens the Position, but Maintenance Margin Keeps It Alive
Margin is often treated as the price of admission. If a broker requires 5% initial margin, a trader can control a $20,000 position with $1,000. That calculation looks simple, but it hides the more important question: how much adverse movement can the account absorb after the position opens?
This is where maintenance margin matters. In cfd trading, the broker continuously compares account equity with the margin needed to support open positions. A trade may have met every requirement when it was placed, yet become vulnerable after losses reduce the account’s equity.
Consider an index consolidating before a US inflation report. A trader deposits $2,000 and uses $1,500 as margin, leaving only $500 available. The position appears adequately funded until the report produces a sharp 1.5% move in the wrong direction. The market has not collapsed, but the account’s remaining capacity can disappear within minutes.
Initial margin gets the trade open. Free margin determines whether it survives ordinary volatility.
Leverage Magnifies Margin Pressure, and Requirements Can Change
Beginners often focus on leverage as a way to increase potential returns. Experienced traders tend to view it as a measure of how quickly their decision-making window can shrink. A highly leveraged position does not merely lose money faster. It leaves less room to wait for a sound market idea to recover from temporary noise.
Curiously, lowering the margin requirement does not make a trade safer. It may make the account more fragile because the trader can open a larger position with the same deposit. A broker offering 2% margin instead of 5% provides more buying power, but that extra capacity is frequently mistaken for usable risk capital.
Margin requirements are not always fixed, either. Brokers may raise them before elections, central bank decisions, company earnings or periods of unusually thin liquidity. Why? Because rapid price changes increase the chance that losses will exceed the collateral held in the account.
A position that was affordable on Monday may consume far more available margin by Thursday, even if its size has not changed.
Margin Calls Are Threshold Events, While Liquidation Can Be Mechanical
A margin call is not necessarily a polite request followed by several days to respond. Depending on the broker and jurisdiction, it may appear as an account warning, a restriction on new positions or an immediate demand for additional funds. If equity continues falling, positions can be reduced automatically.
The order of liquidation deserves attention. Some platforms close the largest losing position first, while others begin with the position consuming the most margin. That distinction matters when several instruments are open. A trader may expect a small speculative position to disappear first, only to see a larger index hedge closed instead.
During the sharp volatility following an economic release, prices can also move through several levels before an order is filled. A stop-out threshold at 50% does not guarantee execution at precisely 50%. Fast markets, widening spreads and gaps can produce a lower closing value.
In cfd trading, the broker’s liquidation policy is part of the risk model, not an administrative detail buried in the account agreement.
Free Margin Is More Useful Than the Maximum Position Size
The platform may show enough available margin to add another position. That does not mean the account can sensibly carry it. One profitable breakout can easily become four unnecessary trades when rising equity is immediately recycled into new exposure.
Suppose gold breaks above a week-long range after weaker US employment data. A long position moves into profit, increasing account equity and free margin. A beginner may use that expanded capacity to add repeatedly as the price rises. An experienced trader notices something else: the position is becoming largest after the easiest part of the move has already occurred.
If gold then sweeps the breakout high and retreats into the range, every late addition increases margin pressure at once. The original analysis may still be reasonable, but the account structure has changed completely.
Before opening a position, record three figures: margin required, free margin remaining after entry and the approximate loss that would trigger the broker’s stop-out level. If ordinary volatility can reach that loss before the trade thesis is invalidated, the position is too large for the account.
