A gap down in stocks is an opening price below the previous session's close. On a chart, it looks like a downward jump. When the opening price falls below the previous session's low, the chart also shows an empty price range between the two sessions.
Gap Down Example
| Trading Session | Price |
|---|---|
| Previous close | $100 |
| Previous day's low | $98 |
| Next opening price | $94 |
The stock has gapped down because it opened below the previous close. The $94 opening price is also below the previous day's $98 low, creating a full gap between $98 and $94.
A gap down shows that buyers and sellers reached a different price balance between trading sessions. The change may follow earnings, company news, an analyst downgrade, economic data or weakness across the market.
How Is a Gap Down Different From a Normal Decline?
A normal decline happens while the stock trades through lower prices. A gap down happens when the stock opens below a reference price from the previous session.
- Normal decline: The stock moves lower through its trading range.
- Gap down: The stock opens below the previous close.
- Full gap down: The stock opens below the previous session's low, leaving a price range between the two sessions.
For example, if a stock closes at $100 and opens at $97, it has an opening gap down. If the previous session's low was $98, the stock has also opened below the prior low.
What Causes a Stock to Gap Down?
Common causes include:
- Disappointing earnings or lower company guidance
- A product recall, lawsuit or regulatory problem
- An analyst downgrade
- A merger, acquisition or financing announcement
- Weak economic data or higher interest-rate expectations
- An overnight geopolitical or market event
- Heavy selling across the company's industry or the wider market
U.S. stocks can also gap down at the regular-market open when international markets or futures markets move while U.S. exchanges are closed.
Is a Gap Down Bearish?
A gap down is usually a bearish short-term signal, but it does not prove that the stock will keep falling.
The surrounding evidence matters:
- A gap down on heavy volume can show strong selling pressure.
- A gap after bad earnings may reflect a change in the company's outlook.
- A small gap in a highly volatile stock may be ordinary price movement.
- A quick recovery can indicate that buyers absorbed the initial selling.
- A stock that stays below previous support may remain weak.
A gap down is a price-action event, not a complete investment thesis. Check the reason for the move, trading volume, support levels, company fundamentals and overall market conditions before deciding what it means.
What Does "Filling the Gap" Mean?
A stock fills the gap when it trades back through the price range created by the gap.
For example:
- A stock closes at $100.
- It opens at $94.
- The gap range runs from $94 to $100.
- If the stock later rises to $100, traders may describe the gap as filled.
A gap fill is not guaranteed. Some gaps retrace quickly, while others remain open for months or never fully close.
Can a Gap Down Affect Stop-Loss Orders?
Yes. A stop-loss order may execute below its specified stop price if the stock gaps past that price.
For example, a sell stop at $95 may execute at $92 if the stock opens at $92 and no buyers are available at $95. This difference between the expected price and the execution price is called slippage. It is one reason gaps can increase trading risk.
What Should Investors Check After a Gap Down?
Check these points before deciding what the move means:
- The reason for the move: Look for earnings, company news or another event that explains the opening price.
- Trading volume: Compare the day's volume with the stock's normal volume.
- Support levels: Review previous lows, moving averages and other areas where buyers entered before.
- The wider market: A stock may be falling because its sector or the overall market is weak.
- Price recovery: A move back above the opening price may show that early selling pressure is easing.
- Fundamental impact: Decide whether the news changes the company's long-term earnings outlook.
The useful question is whether the event changed the company's outlook or only affected the day's order flow.