Pre-open session orders on Zerodha

Wed, 20 May 2026 00:00:00 +0000

The pre-open session on NSE / BSE runs from 09:00 to 09:15 IST. During this window, Zerodha Kite accepts orders that participate in the opening call auction.

Phases

Phase	Time
Order collection	09:00 to 09:08
Order matching	09:08 to 09:12
Buffer / transition	09:12 to 09:15
Continuous trading begins	09:15

Order types accepted

Order type	Pre-open accepted
Limit	Yes
Market	Yes
Stop-loss	Yes
GTT	Stored; not active in pre-open
Bracket / Cover	Not in pre-open; from 09:15

How orders match

During the 09:08-09:12 matching window:

Zerodha pre-market session timings

Wed, 20 May 2026 00:00:00 +0000

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: