Zerodha pre-market session timings
The pre-market session (also called “pre-open session”) on NSE and BSE runs from 09:00 to 09:15 IST, before the regular continuous trading begins. The session uses a call-auction mechanism to determine the opening price for each scrip, accommodating any overnight news flow and balancing supply / demand at the open.
Phases within pre-market
| Phase | Time (IST) | Activity |
|---|---|---|
| Order collection | 09:00 to 09:08 | Orders are accepted (limit and market) |
| Order matching | 09:08 to 09:12 | Indicative opening price computed; matchable orders identified |
| Buffer period | 09:12 to 09:15 | No order placement; transition to continuous session |
| Continuous start | 09:15 onwards | Regular trading begins; opening price reflects pre-open match |
How the pre-open price is computed
During the order collection phase (09:00 to 09:08), orders accumulate. The exchange:
- Aggregates all buy and sell orders received.
- Computes the indicative opening price that would maximise matched volume.
- At 09:08, processes the matching.
- Orders that match at the indicative price execute; unmatched orders carry forward to the continuous session.
This is the same call-auction mechanism used by Periodic Call Auction for surveilled scrips, applied to all scrips at session open.
Order types in pre-market
| Order type | Accepted? |
|---|---|
| Limit order | Yes |
| Market order | Yes (typically) |
| Stop-loss order | Yes |
| GTT order | Stored; not active during pre-open |
| Bracket / Cover order | Not in pre-open; from 09:15 |
Some product types (MIS for some segments) may have specific pre-open restrictions.
Which segments have pre-open
| Segment | Pre-open? |
|---|---|
| Equity (NSE / BSE cash) | Yes |
| Index futures (NSE / BSE) | Yes (some) |
| Stock futures | Generally no |
| Stock options | Generally no |
| Currency derivatives | No (continuous from 09:00) |
| Commodity (MCX ) | No (continuous session) |
Index futures have a pre-open mirroring the cash segment for the underlying index. Most other derivatives skip the pre-open phase.
Why pre-open exists
The pre-open session serves several purposes:
- Smooth opening. Overnight news creates large buy / sell imbalances; the call auction concentrates them for an orderly match.
- Price discovery. The opening price reflects all morning order intent, not just the first tick.
- Volatility management. Reduces the chance of large opening gaps with thin order books.
How traders use pre-open
Setting up the day
Active traders place limit orders at desired prices during pre-open:
- Buy limits at expected support.
- Sell limits at expected resistance.
- Orders match at the opening price if the limit is hit.
Inferring sentiment
The indicative opening price (visible on Kite during 09:08-09:15) signals overnight sentiment:
- Big gap up: bullish overnight.
- Big gap down: bearish overnight.
Avoiding aggressive market orders
Placing a market order during pre-open may execute at the worst-case price within the matchable range. Limit orders are preferred for pre-open participation.
On Kite during pre-open
- The marketwatch shows the indicative opening price (updated during 09:08-09:15).
- LTP is the indicative open, not a continuous tick.
- Volume and turnover counters start fresh at 09:15.
- Day’s change displays from prior close once the open is finalised.
Edge cases
Stocks under Periodic Call Auction
PCA scrips continue with their own call-auction schedule (not the standard pre-open). Their pre-open is functionally the same call-auction but with longer windows.
Mid-day suspension
If a scrip is suspended intraday and resumes, the resumption may use a brief call-auction to re-discover price, similar to pre-open.
Holiday open
The day after a holiday typically has more pre-open activity (overnight news accumulates over the weekend / holiday).
See also
- Zerodha market timings
- Zerodha holiday list 2026
- Zerodha Muhurat trading 2026
- BSE Sensex options trading hours
- Zerodha MCX trading hours
- Zerodha currency segment timings
- Pre-open session
- Closing session NSE
- Auction market on NSE / BSE
- Periodic Call Auction stocks
- Settlement cycle changes 2025-26
- T+1 settlement in Indian equity
- Instant settlement T+0 stocks list
- Kite Holdings tab explained
- Kite Positions tab explained
- How to use the marketwatch on Kite
- How to add scrips to the Kite marketwatch
- Day’s change in absolute and percentage
- Absolute and percentage change from open
- Limit order
- Market order
- Stop loss order
- GTT order (Zerodha)
- Bracket order (Zerodha)
- Cover order (Zerodha)
- National Stock Exchange
- Bombay Stock Exchange
- Kite (Zerodha)
- Zerodha
External references
References
- NSE India, Pre-open session methodology, nseindia.com.
- BSE India, Pre-open session rules, bseindia.com.
- Zerodha Support, Pre-market session on Kite, support.zerodha.com.