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Closing Auction Session यानी CAS आखिर क्या है और इससे Share Market में Trading कैसे बदलने वाली है?

3 August 2026 के बाद से F&O stocks में Closing Price तय करने का mechanism बदल गया है। अब पुराने 30-minute VWAP mechanism की जगह Closing Auction Session यानी CAS के जरिए closing price तय की जा रही है।

इस वीडियो में आसान भाषा में समझेंगे:

CAS यानी Closing Auction Session क्या है?
Closing Price इतनी important क्यों है?
पहले 30-minute VWAP से Closing Price कैसे निकलती थी?
CAS में Equilibrium Price कैसे तय होती है?
3:15 PM के बाद पूरा CAS schedule क्या है?
Market और Limit Orders कब लगाए जा सकते हैं?
F&O traders को किन बातों का ध्यान रखना चाहिए?
Expiry Day पर CAS से क्या risk बढ़ सकता है?
Intraday traders को अपनी exit planning कैसे बदलनी चाहिए?
Long-term investors, ETFs और Index Funds पर इसका क्या असर होगा?
CAS के फायदे और संभावित risks क्या हैं?
वीडियो में एक आसान order-book example से यह भी समझाया गया है कि किस तरह Maximum Executable Volume वाली price को official closing price बनाया जाता है।

Disclaimer: Investments in securities market are subject to market risks. Invest करने से पहले सभी संबंधित documents carefully पढ़ें।

#CAS #ClosingAuctionSession #SEBI #StockMarket #FNO #Trading #ShareMarket #Nifty #Investing #IntradayTrading #FuturesAndOptions #StockMarketIndia

~HT.178~PR.474~GR.508~VG.HM~

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Transcript
00:003 August 2026, the share market has been made in every side.
00:06Which side?
00:08Bazaar's most important action has been changed.
00:11Bazaar has been changed in trade.
00:14The market has been introduced to a new character.
00:17C.A.S.
00:19C.A.S.
00:20This C.A.S.
00:22Bazaar's hero or villain is what we are trying to understand.
00:26If you can see, this new system is not so bad.
00:28Please do a little bit.
00:32Let's do a closing auction session with C.A.S.
00:36C.A.S.
00:38Hello and welcome.
00:39I am with you.
00:42If you have equities, derivatives, or mutual funds, or ETFs,
00:47you will have affected by C.A.S.
00:52You will have affected you.
00:54Whether it's more or more.
00:56This is why we will talk about two things in this video.
00:59You have heard about C.A.S.
01:26C.A.S.
01:28C.A.S.
01:28C.A.S.
01:47C.A.S.
01:48C.A.S.
02:13C.A.S.
03:05C.A.S.
03:11C.A.S.
03:11C.A.S.
03:16C.A.S.
03:20C.A.S.
04:02C.A.S.
04:03C.A.S.
04:04C.A.S.
04:11C.A.S.
04:12C.A.S.
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04:13C.A.S.
04:15C.A.S.
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04:18C.A.S.
04:19C.A.S.
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04:20C.A.S.
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04:21C.A.S.
04:21C.A.S.
04:22C.A.S.
04:23C.A.S.
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04:24C.A.S.
04:26C.A.S.
04:26C.A.S.
04:27C.A.S.
04:29C.A.S.
04:31C.A.S.
04:33C.A.S.
04:36C.A.S.
04:41This VWAP is a reference price, which will be auctioned by now.
04:47This is your transition period.
04:53In FNO stocks, there will be continuous trading.
04:59In FNO contracts, there will be a normal trade.
05:08Existing open orders carry forward,
05:11stop-loss orders, iceberg orders and those orders,
05:15which are the reference price.
05:19This is the order entry session.
05:25You can use the market and limit orders to place, modify or cancel.
05:31Exchange, indicative price,
05:34total buy or sell quantity order imbalance,
05:40buyers or sellers,
05:43this is the order entry session.
05:49This is the order entry session second.
05:53Now, there are limit orders allowed.
05:55Market orders placed, modify or cancel.
05:59This session, randomly,
06:013.08-09-30.00-30.00-30.00-30.00.00-30.00.00-30.00.00,
06:08close or cancel.
06:09If you have the orders,
06:13you can take constantly,
06:15it will be 19.00-30.00-30.00-30.00.00-30.00.00.00.00.00,
06:28milse.
06:29trade confirmations generate closing price final publish
06:35this is 5 minutes.
06:37Now the question is closing price is how to decide in the CIS system?
06:43In the auction window, there is an order book in your screen.
06:49Buyers who pay for 1010 Rs. pay for ready are
06:531005, 1002 or 1000 Rs.
06:57Sellers who sell to 10000 Rs.
06:59Sellers who sell to 10000 Rs.
07:00Sellers who sell to 10000 Rs.
07:05Exchange price level will be calculated.
07:09Cumulative by quantity, cumulative sell quantity
07:11and executable value.
07:14That is how many stocks match,
07:19how many shares match.
07:21Now look at the figure.
07:23For example,
07:23we will tell you that
07:261,000 Rs. price per 200 shares,
07:281,000 Rs. price per 500,
07:301,000 Rs. price per 900,
07:321,000 Rs. price per 900,
07:331,000 Rs. price per 800,
07:341,000 Rs. price per 800,
07:34and 1,000 Rs. price per 500 shares.
07:37Buying and selling.
07:39Volume this was.
07:40Here, maximum,
07:41maximum,
07:42maximum,
07:42executable volume 900 shares,
07:441,000 Rs. price per 100,
07:47value.
08:11exchange,
08:161,000 Rs. price per 500,
08:16and ETFs, tracking error should be reduced by short term, volatility, NAV, net asset value
08:24can be seen by swings.
08:27Now, for intraday traders.
08:30FNO stocks, continuous trading is 3.15 minutes, auto square of timing is adjusted by broker
08:37specific.
08:38For example, if we take a example of zero-odha, which is a brokerage firm,
08:43FNO stocks, intraday positions, 3.12 pm, square of rule,
08:49means you have to exit planning more quickly,
08:54not auto square of charges.
08:57For FNO traders or expiry traders, single stock options physically settled
09:03and settlement price is equal to CAS closing price.
09:07So expiry day, indicative close and final close may be a big gap.
09:13OTM contracts, ATM or ITM may behave.
09:18Risk management is also necessary for the last 30 minutes.
09:23Now, if you are an active trader, then you should note these points.
09:28These are very important points for your trade.
09:38For FNO stocks, no new orders in FNO stocks.
09:41In FNO stocks, there is no new order in FNO stocks.
09:43For FNO stocks, there is no new order in FNO stocks.
09:44In 3 up to 3.15 minutes, market plus limit orders are allowed.
09:473.25-3.30am to limit orders and random close.
09:523.30-35am to matching and closing price.
09:57Expire days per extra caution, monthly or weekly expiry per C.A.S. volatility is the most visible.
10:03Deep O.T.M. options is very high, and risk and reward is very important.
10:10Liquidity per payout.
10:12C.A.S. participation कम है, वहाँ price swings ज्यादा है.
10:17High liquidity F.A.S. stocks पर focus रखिएगा, especially expiry के असपास.
10:22Alerts और GTT orders adjust करिएगा.
10:24F.A.S. stocks के लिए GTT या फिर प्राइस alerts 3.15pm तक ही trigger हो सकते हैं.
10:29Non F.A.S. के लिए 3.30 बज़े तक, F.A.S. contracts के लिए 3.40 मिन तक
10:34long term perspective रखिएगा.
10:36Sevy का stance clear है, C.A.S. rollback नहीं कोगा. यानि आपको सीखना पड़ेगा इसको deal करना.
10:43शुरुवाती volatility temporary है, participation बढ़ने से situation stabilize होने की उमीध है.
10:49अगर आप investor है, तो बस यह समझ लें कि closing price अब और transparent method से बनेगा.
10:55और rollback तो C.A.S. होने वाला है नहीं, तो थोड़ा ध्यान से समझ पूछ करके अपनी trading करिए.
11:00अगर यह explainer useful लगा हो, तो वीडियो को like ज़रूर करिएगा, channel subscribe करिएगा, good returns और comments में
11:06बताइए कि आप intraday trader है या long term investor.
11:09C.A.S. के बाद आपके trades में क्या सबसे बड़ा बदलावाया?
11:13और हाँ, investment securities market में market risk के subject है, invest करने से पहले सभी related documents को carefully
11:20पढ़ियेगा ज़रूर और brokerages या financial advisors की राये अपनी किसी भी trade से पहले लेना बद भूलियेगा.

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