Understand it
Notional value is the contract multiplier times the underlying price. Required margin may be a small fraction of that exposure and may change with volatility or broker policy. Accounts are marked to market; losses can trigger margin calls or liquidation. Stops can be filled worse than expected, and futures losses can exceed funds deposited. Calculate notional and stop risk separately.
At a hypothetical ES index level of 6,000, one contract has $300,000 of notional exposure (6,000 × $50). A broker may require much less in margin. Neither figure sets the final loss on a trade.
Watch for this misconception
Assuming that because a broker allows a position, it must fit a sensible trading risk budget.
Write down three different numbers for a sample trade: notional exposure, broker margin requirement, and planned stop exposure.
Position-size calculator ↗Which statement about margin is accurate?
Check the sources
Hypothetical educational examples. Verify current product specifications and rules before making decisions.