Micro futures

Definition

Micro futures are 1/10th-size versions of benchmark contracts — Micro E-mini S&P 500 (MES, $5 × index), Micro Nasdaq (MNQ), micro gold, micro crude, micro Treasury yields — introduced (from 2019 on) to make futures exposure granular. Their platform significance is SIZING RESOLUTION: risk budgets that a full-size contract would violate become implementable, and strategies can scale in units small enough for honest fixed-fractional arithmetic at modest account sizes.

How it works / structure

• Mechanics: identical underlying, settlement style, and tick structure logic to the parent contract at 1/10th multiplier; margins scale proportionally (ms-futures-margin); same session hours; fungible economics with the parent (10 MES ≈ 1 ES) but NOT offsettable into one position — they margin as separate contracts.
• Engine-relevant parameters: multiplier, tick value (MES: $1.25 per 0.25), liquidity tier (micros trade deep in the index majors, thinner in some commodity micros — spread cost as a fraction of notional can exceed the parent’s, ms-bid-ask-spread), and the sizing table (account risk budget → contract count feasible at micro granularity).
• Cost comparison: commissions per contract weigh 10× more per notional on micros; the granularity is paid for in round-trip cost efficiency — a deliberate trade the sizing layer should surface.

When it applies

Accounts and strategies where one full-size contract exceeds the per-trade risk budget (risk-fixed-fractional — a 2-ATR stop on ES can be several % of a small account; MES divides it by ten); scaling ladders needing fine increments (mgmt-scaling); live validation of replayed futures strategies at reduced risk before size-up.

Risk profile & failure modes

• Same leverage physics: 1/10th size is not 1/10th leverage discipline — notional-blind sizing repeats the full-size mistake in smaller font.
• Fee drag at scale: running 10 micros instead of 1 mini pays roughly 10× per-contract fees for the same exposure; strategies that graduate in size should graduate in contract tier.
• Thin-tier micros: away from the index majors, micro books can be wide enough to change a strategy’s friction profile vs its parent-contract replay.

Evidence & limits

Contract specifications are exchange-documented. There is no strategy evidence specific to micros — they are the same exposure at smaller size; the platform’s interest is the sizing arithmetic they enable and the fee/liquidity differences they carry, both measurable facts entered into replay cost models.

Falsifiable-thesis examples

Illustrations only, not signals:

• “Strategy S, replayed with MES fills and micro fee schedule, retains at least 80% of its ES-replay Sharpe” — falsified by the paired replay.
• “MES spread cost as % of notional stays within 1.5× the ES equivalent during regular hours this quarter” — falsified by the measured series.

Cross-references

• Parent contracts: instrument-equity-index-futures, instrument-metals-futures, instrument-energy-futures
• The sizing math they serve: risk-fixed-fractional, mgmt-scaling
• Cost surfaces: ms-bid-ask-spread, ms-slippage-friction, ms-futures-margin