Methodology

Data source

Quotes and extended-hours prices are sourced from publicly available exchange-derived market data feeds. Extended-hours prices reflect trades on electronic communication networks (ECNs) and may be delayed by up to several minutes. Data refreshes approximately every 5 minutes.

Universe and filters

• The candidate universe combines the day's most active stocks with the largest regular-session gainers and losers on US exchanges.
• US-listed common equities only — no ETFs, warrants, or OTC.
• Minimum share price of $0.50 and minimum regular-session volume of 50,000 shares, to exclude illiquid quotes that distort percentage moves.
• Movers are ranked by extended-hours percentage change (after-hours or premarket, depending on the page).

Known limitations

• A stock that was quiet during regular hours but moves sharply after the close can occasionally be missed if it does not appear in the candidate universe.
• Extended-hours volume is thin. Large percentage moves on small volume may not persist into the next regular session.
• Data may be delayed and should not be used for trade execution.

Corrections

If you spot a data error, email hello@llmcouncil.ai. Material corrections are noted on the affected page.

Who runs this site

After Market Movers is an LLM Council project by Evolo Pty Ltd. It publishes factual market data and context. It does not publish buy, sell, or hold recommendations, price targets, or personal financial advice.