⚠ BETA — all market data shown (deals, filings, prices, indices) is demo / illustrative, not live trading data. For evaluation only; verify before acting.
June 14, 2026
The Dispatch

Definition

Pre-Open and Closing Session Price

The market also has a special closing session that determines the official closing price used for settlement and index calculation.

Beyond the pre-open auction at the start, the NSE/BSE compute the official closing price as the weighted average of trades in the last 30 minutes (3:00-3:30 p.m.), not simply the last trade. This reduces manipulation of the close.

There is also a brief post-closing session (3:40-4:00 p.m.) where orders can be placed at the determined closing price. The official close is what's used for mark-to-market settlement, index values, and benchmarking, so it matters more than the casual 'last price'.

Related terms

  • Pre-Open SessionThe pre-open session is a short window before regular trading begins, during which orders are collected and a single opening price is established through a call auction to absorb overnight information.
  • Last Traded Price (LTP)The Last Traded Price is the price at which the most recent trade in a security actually executed, and it is the figure usually shown as the live current price.
  • VWAPVWAP (Volume Weighted Average Price) is the average price of a stock over a period, weighted by the volume traded at each price.

Plain-English explainer from The Dispatch Investors Encyclopedia. General information, not financial advice.