MES vs MNQ position sizing: calculate futures risk before a trade

The short answer: A Micro E-mini S&P 500 (MES) outright futures tick is worth $1.25 per contract; a Micro E-mini Nasdaq-100 (MNQ) outright tick is worth $0.50. Multiply the number of ticks between the planned entry and stop by that tick value, then multiply by the number of contracts. This gives planned price risk, before commissions, exchange fees and any difference between the stop price and the actual fill. It is not a guaranteed maximum loss.

Know the contract before choosing the size

Both contracts move in minimum increments of 0.25 index points for outright trades. The dollar multiplier differs: CME specifies MES at $5 per index point, making one 0.25-point tick worth $1.25. CME specifies MNQ at $2 per index point, making one 0.25-point tick worth $0.50. The smaller dollar value of an MNQ tick does not mean its market price moves more slowly or that a particular MNQ trade is safer.

A worked 40-tick stop example

Suppose a trader's plan calls for a stop 40 ticks away from entry. That is 10 index points in either contract, because 40 × 0.25 = 10. For one MES, the planned price risk is 40 × $1.25 = $50. For one MNQ, it is 40 × $0.50 = $20. These are two separate examples, not a suggestion to trade both.

If the hypothetical risk budget for one trade is $100, arithmetic alone would fit two MES contracts or five MNQ contracts at exactly that stop distance. A real order needs room for trading costs and slippage, so a trader should not treat those counts as a recommendation or an exact loss ceiling. The appropriate stop comes from the trade idea and market conditions; changing it merely to fit a larger position reverses the logic. CME's position-size lesson likewise starts with the stop location and the amount of account risk the trader is willing to take.

Price risk, account risk and margin are different numbers

The formula measures a price move from entry to a planned exit. Account risk also includes charges and the possibility that a stop executes at a different price during a fast market. If the trade is part of a prop-firm evaluation, a separate daily-loss or drawdown rule may be the binding constraint. Read that program's current rules and leave space for unrealized losses and fees where the rules count them.

Margin is another separate figure. CME explains that futures margin is a deposit maintained with a broker; it is not the price of the contract or a cap on loss. Margin requirements can change. The US Commodity Futures Trading Commission warns that futures losses can exceed the initial amount invested. That is why the ability to open a position is not evidence that it fits a trading plan.

A pre-trade checklist

1. Confirm the contract symbol and its current exchange specifications.
2. Set the planned entry and the price level that would invalidate the trade; convert the distance to ticks.
3. Multiply ticks by the contract's tick value, then add an allowance for fees and possible slippage.
4. Compare the result with your own per-trade loss limit and any account or evaluation drawdown rules.
5. Choose a whole-number contract count only after those checks. If one contract already exceeds the limit, the trade does not fit that limit.

Evidence note: We checked CME contract specifications and education material and the CFTC's investor guidance on October 7, 2026. The figures above are hypothetical calculations, not actual trades, fills, account results or a promise that a stop will cap a loss. This guide is general education, not personalized investment advice.