Why Did the Nifty Jump 400 Points at 3:30 PM?
The latest stock market session surprised many investors. The market was moving normally during the day, but in the last few minutes, the Nifty suddenly jumped nearly 400 points, rising more than 1.5%. A huge green candle appeared on the chart, leaving traders wondering what had happened.
This was not a trading mistake or random market movement. The sharp rise happened because of two major reasons: positive global news and SEBI’s new closing price system.
Global News Boosted Market Sentiment
The first reason was positive news from the Middle East. Donald Trump announced that the planned action against Iran would not happen and that talks would begin instead. This reduced worries about a larger conflict.
Global markets reacted positively. European stock markets moved higher, while crude oil prices dropped sharply as investors became less worried about supply disruptions. Lower oil prices also improved market sentiment in India.
Why the Market Jumped at 3:30 PM
Many investors think the price shown at 3:30 PM is simply the last traded price. But that is not always true.
There are two different prices:
- Last Traded Price (LTP): The price of the final trade.
- Closing Price (CP): The official closing price used for mutual funds, ETFs, and index calculations.
The closing price is calculated in a special way to prevent anyone from manipulating prices at the end of the trading day.
SEBI’s New Closing Price Rule
SEBI has introduced a new system for F&O stocks and indices like Nifty and Sensex.
Earlier Method (VWAP)
- Used the average price of trades during the last 30 minutes (3:00 PM to 3:30 PM).
New Method (Closing Auction Session)
- F&O stocks enter a special auction between 3:15 PM and 3:30 PM.
- During this period, orders are collected and matched.
- The final closing price is announced at 3:30 PM.
Because all matching happens during the auction, the chart can suddenly show a big jump when the final price is released.
How the Closing Auction Works
The 15-minute auction runs in different stages:
- 3:15 PM – 3:20 PM: Trading pauses.
- 3:20 PM – 3:25 PM: Investors can place, change, or cancel orders.
- 3:25 PM – 3:30 PM: Only limit orders are allowed.
After all orders are matched, the official closing price is declared at 3:30 PM.
Why Traders Were Surprised
Since the auction happens behind the scenes, traders cannot see the final price until the auction ends. This means the market can suddenly move sharply when the closing price is announced.
In this case, the result was a nearly 400-point jump in the Nifty, which surprised many market participants.
Adding to the confusion, F&O trading continues until 3:40 PM, giving traders only a few minutes to react after the new closing price is announced.
What Investors Should Know
The sharp rise was caused by two things happening together:
- Positive global news improved investor confidence.
- SEBI’s new closing auction system made the final move appear suddenly at 3:30 PM.
As SEBI gradually expands this new system, investors and traders should understand how the closing auction works. Big moves at the end of the trading session could become more common, making the last few minutes of the market more important than ever.