Note: Market Opens from 9:15 am from today (Oct 18th); pre open session (9-9:15am)

Visit http://indiaer.blogspot.com/ for complete details 􀂄 􀂄
Salient Features of the pre open session

All executable orders for a particular stock will match at one market opening price
Orders are collected in the order entry period & execution occurs in the order matching period
Duration of Pre-open session - 15 minutes from 9:00am – 9:15am
Limit orders will get priority over market orders at the time of execution of trades.
All orders shall be disclosed in full quantity, i.e. orders where revealed quantity function is enabled, will not be allowed during the pre-open session.
Unexecuted, eligible orders will be moved to the continuous session
In the event of no trades in the pre-open session, the orders entered in the pre-open session will be moved the continuous trading session on time priority basis.The price of the first trade during the continuous trading session will be taken as the opening price.
Indicative opening price & matchable quantity for each stock and indicative SENSEX will be disseminated at regular intervals of order entry period.
At the end of the matching period, the system will compute & disseminate the opening values for all stocks, SENSEX and other indices.
Uniform price band of 20% will be applicable to all eligible stocks during the pre-open session.

Call Auction method of trading has several advantages –

Reduces price volatility due to multiple matching of orders at a single price
Greater liquidity due to deeper demand supply schedule
Better Price discovery
Minimised impact cost
Fairer market especially for small, non professional investors because all trades get executed at the same price
Simultaneity of trades eliminates possibility of front running customer orders

Source: BSE