Sessions and economic-event volatility
Liquidity and volatility vary across the trading day and spike around scheduled economic releases.
Leverage risk. Futures losses can exceed your margin deposit. Contract specs, margins, sessions and funded-account rules here are illustrative; verify current specifications with the exchange, your broker or the provider.
Session structure
Many equity-index futures trade nearly around the clock on weekdays with a short daily maintenance break (check current hours). Volume and depth are typically highest during the underlying cash market's regular hours and thinner overnight, when spreads and slippage can widen.
Levels such as the overnight high/low and the regular-session open are widely watched reference points.
Scheduled events
Releases such as inflation data, employment reports and central-bank rate decisions can move index futures sharply within seconds. Liquidity often thins just before, then volatility expands after.
Common practices: check the economic calendar daily, stay flat or reduce size into major releases, widen stops (and cut size) if holding, and avoid market orders in the first seconds.
Worked example
A stop through a release (illustrative MES)
- Long 4 MES with a 6-point stop: planned risk 4 × 6 × $5 = $120.
- At the release, price drops 15 points in seconds; the stop fills 15 points below entry.
- Actual loss = 4 × 15 × $5 = $300 = 2.5R.
Event volatility can turn a planned 1R into several R. Plan around the calendar.
Common misconceptions
“Big news moves are easy money if you guess the direction.”
Direction is unpredictable, spreads widen and fills are poor. Many traders simply stand aside.
“Overnight moves don't count.”
Positions are marked to market continuously; overnight losses are real.
Checkpoint