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What Is Pre Market And Post Market Session In Stock Market

Learn how pre-market and post-market sessions work in the Indian stock market and how they influence price discovery, sentiment, and trading decisions.

1st Mar 2025   |   Read time: 10 mins

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Pre-Market and Post-Market Sessions

AI Summary

  • Pre-market (9:00–9:15 AM) helps determine opening prices and offers early cues on market sentiment and overnight developments.
  • Post-market (3:40–4:00 PM) provides an additional window to respond to closing-market developments and place after-market orders.
  • Both sessions typically have lower liquidity, so investors should consider wider spreads and higher price volatility.

In market the pre and post market session are crucial to decipher the day-to-day movements and, in this blog, we will tell you how these sessions can help you.

Pre- Market Session


The pre-market session is the period before stock market regular trading hours. Usually running from 9:00 AM to 9:15 AM, the pre-open session in Indian stock market only permits trading of equity segment. This session is absolutely important since it determines the stock opening prices.

Participating in the pre-market lets you see early price swings and respond to news or events that happened following the last trading session. Orders are gathered at pre-market session without any real trading occurring. The system then bases on supply and demand the opening price using these orders. This approach, sometimes referred to as the call auction, which ensures that the starting prices are set fairly, so mirroring the market attitude at the start of the trading day.

Attending the pre-market session will help you to better understand investor attitude and market trends. If a given stock shows a notable volume of orders, it could mean that news or events have affected its price over night. This data will help you, either as an investor or trader, modify your approach prior to the main session. If you intend to make quick decisions or if you are keeping an eye on stocks sensitive to local or worldwide events, this early realisation is quite helpful.

Post Market Session


The post-market session also known as the after-hours session—occurs following the official market closing time i.e. after 3:30pm. Like pre-market only equity is allowed to trade between 3:40 PM and 4 PM during the post session. After the regular market closes, the post-market session creates more trading possibilities.

While the trading volumes for this period are usually smaller than during the regular session, this time can be very important for traders who can act on a late-breaking news or economic announcements. By letting you create positions depending on daily closing trends, the post-market session can act as a link to the trading next day.

The post-market session offers you several advantages. First, you can still change your positions even if there is major news released following market closure. Second, if you missed the trading window during regular hours, the post-market session provides you an extra window to enter or exit positions. After-market-orders (AMOs) also let traders bid for the next trading day.

Key Differences and Their Importance


Timing and Liquidity

The most obvious difference between the pre and post market session is their timings. While the post-market session helps wrap the day by letting trades based on the closing performance, the pre-market session shapes the opening prices, so determining the tone of the day.

Another important consideration is liquidity; trading volumes in both pre and post sessions usually are much less than the main market session. This implies that swings in price can be more noticeable and that spreads could be wider, so influencing the prices you use for your trading.

Impact on Market Sentiment

Both sessions show early signs of market attitude. Pre-market allows you to get a first look at traders’ opinions prior to official trading day start. Trading activity in the post-market can mirror the response to daily or closing market news releases. Tracking these sessions helps you to better grasp the changing market attitude and modify your trading plans.

Knowing these sessions will help you as a trader or investor to better schedule your trades. Both pre-market and post-market sessions provide good windows of opportunity whether your goal is to leverage early price swings or protect your portfolio against unanticipated events after hours. These sessions can improve your whole trading approach and enable you to confidently negotiate the market by means of deliberate planning and careful analysis.

Check out the Chola Securities Website for more market insights, investment resources, and the latest updates.

Disclaimer: Trading during pre-market and post-market sessions may involve additional risks, including lower liquidity and higher volatility. Investments in the securities market are subject to market risks. Read all related documents carefully before investing.


FAQs on Pre-Market and Post-Market Sessions

The pre-market session is the period from 9:00 AM to 9:15 AM during which equity orders are collected and used to determine the opening price through a call auction.

The post-market session takes place after the regular market closes, typically from 3:40 PM to 4:00 PM, allowing limited equity trading and after-market order placement.

It establishes fair opening prices and provides an early indication of investor sentiment based on overnight news and order flow.

Trading volumes are generally lower than during regular market hours, which can result in wider bid-ask spreads and greater price volatility.

Traders can use them to respond to news, adjust positions, and prepare strategies for the upcoming trading session.

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