Results and policy meetings have dates, so you can size around them. A regulatory action, a plant fire, an auditor resigning or a promoter arrest arrives without warning — and every level on your chart becomes irrelevant in a single session.
Why the first reaction is unreliable
On a scheduled event, the market has had weeks to think about the range of outcomes. On unscheduled news, thousands of participants are reading the same headline simultaneously and almost nobody has read the underlying document.
| Phase | What is happening | What it is worth trading |
|---|---|---|
| First minutes | Reaction to a headline nobody has verified | Nothing — you are guessing against algorithms |
| First session | Positioning unwinds; stops cascade | Little; the move overshoots in both directions |
| Days 2–5 | The actual document gets read and analysed | This is where a view becomes possible |
| Weeks after | Consequences become quantifiable | Where fundamental repricing settles |
Someone shouts in a crowded hall. Everyone moves before anyone knows what was said. Some of the movement is the news; most of it is people reacting to other people moving.
A news gap is that. Part of the move is repricing and part is stops firing into thin books — and on the day itself you cannot tell which part is which.
Categories, ranked by durability
- Regulatory action against the business model
- Auditor resignation or a qualified opinion
- Promoter fraud or governance failure
- Loss of a licence or major approval
- A plant fire with insurance cover
- A single quarter disrupted by an external event
- Sector-wide sentiment from an unrelated company
- A large but one-off tax demand under appeal
A news gap is the case where a stop was never going to protect you. Size, not the stop, is the only control that works here.
What to actually do
- 1Do not trade the first hour
You are competing with people who read faster, and with algorithms that read instantly. There is no edge available and the spread is at its widest.
- 2Read the filing, not the headline
Exchange announcements carry the actual document. Headlines routinely misdescribe severity in both directions.
- 3Decide the category before the price
Business-changing or number-changing. Answer that before looking at how far it has fallen, or the fall will answer it for you.
- 4If you were already positioned, reassess from scratch
The thesis you had was formed without this information. Re-underwrite rather than deciding whether to "give it time".
A stock falls 18% on an auditor resignation, and another falls 18% on a plant fire that is fully insured. Which is more likely to recover?
Bhari hall mein kisi ne cheekh maari — sab hilne lagte hain, isse pehle ki kisi ko pata chale kya kaha gaya. News gap wahi hai: thoda hissa asli khabar ka hai aur zyada hissa logon ka ek doosre ko dekh ke bhaagne ka. Pehle ghante mein trade karna sirf andaza hai.
- Unscheduled news makes every chart level irrelevant in one session.
- Initial moves overshoot because stop cascades add selling unrelated to the news.
- Ask whether it changes the business or only this year's numbers.
- Read the exchange filing rather than the headline before forming a view.
- These days are survived through position sizing, not exploited through skill.
Mark it done to track your progress through the curriculum.
Common questions
Short, direct answers to what people ask about this topic.
- what counts as unscheduled news for a stock
- Unscheduled news is any material development that arrives without a date on the calendar — a regulatory order, a plant fire, an auditor resigning, a promoter arrest, the loss of a licence or a major approval. It differs from results and policy meetings in that you cannot reduce size in advance, so every level drawn on the chart can stop mattering within a single session.
- the initial price move on unscheduled company news usually
- Overshoots, in both directions. Part of the move is genuine repricing and part is forced exits and stop cascades firing into a thin order book, and on the day itself the two cannot be told apart. That does not make fading the move a workable trade — it means the first print is not information.
- where can I read the actual announcement behind a stock news headline
- In the corporate announcements section of the NSE and BSE websites, where listed companies file material developments directly. It is free and it carries the actual document rather than somebody’s summary of it. Headlines routinely misdescribe severity in both directions, which is why the filing is the version worth reading before forming any view.
- how do I tell if a sharp fall on bad news is permanent
- The question that separates the two is whether the news changes the business or only this year’s numbers. A fire at an insured plant changes the numbers; an auditor resigning changes what you thought you knew about everything, including the numbers already reported. Deciding that category before looking at how far the stock has fallen matters, because otherwise the size of the fall answers it for you.
- why does a whole sector fall when one company gets bad news
- Because participants price in read-across before anyone knows whether it applies. Sometimes it genuinely does — a regulatory action aimed at a practice the whole industry uses will reach every name in it — and sometimes the fall is pure association with no changed economics behind it. The underlying filing usually makes clear which of the two is happening.