Stocks gapping up or down in pre-market trading, sorted by gap percentage.
Updated live from 4:00 AM to 9:30 AM ET.
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For informational purposes only. The data and visualizations on this page do not constitute financial advice, investment recommendations, or an offer to buy or sell any securities. Always do your own research and consult a qualified financial advisor before making investment decisions.
Pre-market gappers are stocks that are trading significantly higher or lower than their previous closing price during the pre-market session (4:00 AM – 9:30 AM ET). A “gap up” occurs when a stock opens above its prior close, while a “gap down” occurs when it opens below. These gaps are typically driven by overnight news, earnings reports released after hours or before the open, analyst ratings changes, or global market movements.
Pre-market gappers are a staple of most day trading morning routines. By scanning for the biggest movers before the bell, traders can build a focused watchlist of stocks with the momentum and volatility needed for intraday opportunities. Some traders employ gap-and-go approaches, monitoring stocks that gap up on high volume. Others watch for potential gap-fill patterns in stocks that gap on thin volume.
Traders who follow this approach typically look for stocks gapping up 3%+ on above-average pre-market volume with a clear catalyst (earnings beat, news). They often watch the gap-up level to hold as a reference point.
Stocks that gap up or down on low volume and no clear catalyst historically have shown a tendency to partially retrace (return to the previous close) during the first 30 minutes of trading. Fade traders take the opposite side, targeting the gap fill as their profit objective.
Pre-market trading begins at 4:00 AM Eastern Time and runs until the regular market opens at 9:30 AM ET. Most brokers offer pre-market access starting at 4:00 AM or 7:00 AM depending on the platform. Our scanner begins tracking gaps as soon as pre-market data is available.
Overnight gaps are caused by events that occur when the regular market is closed: earnings announcements (typically released at 4:00 PM or before 9:30 AM), FDA decisions, geopolitical events, overseas market moves, or pre-market analyst upgrades and downgrades.
No. Based on historical data, roughly 60–70% of gaps partially fill within the first trading hour. Gaps backed by high volume and strong catalysts (like an earnings beat) have historically been more persistent. Gaps on thin volume with no news have historically been less persistent.
For large-cap stocks, a 2–5% gap is considered significant. For small-cap stocks, gaps of 5–20% are common. Our scanner uses a minimum 1% threshold to filter out noise and focus on the most meaningful pre-market moves.
