Dear Customer,
We would like to inform you that NSE and BSE have introduced significant changes affecting trading in F&O stocks, including the mechanism for determination of closing prices via Closing Auction Session (CAS).
These changes are pursuant to:
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SEBI Circular No. HO/47/11/11(3)2025-MRD-POD2/I/2765/2026
-
BSE Circular No. 20260610-41
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NSE Circular No. NSE/CMTR/74466
What is CAS?
CAS is a 20-minute session from 3:15 PM to 3:35 PM for eligible F&O stocks. During CAS, buy and sell orders are collected and matched at a single price, which becomes the official closing price for the day.
What is changing?
For CAS-eligible stocks, regular LTP data stops updating at 3:15 PM when the normal trading session ends.
To make CAS-eligible stocks easier to identify, a “CAS Eligible” tag will be displayed below Market Depth on the Company Page.
The Company Page will also display relevant CAS data points to help you track the auction.
For eligible stocks on NSE & BSE, the following data points will be available:
- Indicative Close Price: The price at which the maximum executable quantity can currently be matched during CAS.
- Reference Price: The price determined based on the VWAP of trades executed between 3:00 PM and 3:15 PM.
- Imbalance Quantity: The net unmatched buy or sell quantity in the CAS order book.
- % Change from Close: The percentage change in the Indicative Close Price compared with the previous day’s closing price.
For Indices & Stock Futures:
- NSE & BSE Indices: Only the Indicative Close Price will be displayed. This can be referred to for tracking the CAS price.
- NSE Stock Futures: Only the Reference Price will be displayed. This can be referred to for tracking the relevant price during CAS.
How can you track the price during CAS?
- Before 3:15 PM: LTP continues to reflect the last traded price.
- At 3:15 PM: LTP stops updating for CAS-eligible stocks. Refer to the Reference Price displayed on the Company Page.
- 3:20 PM to 3:30 PM: Refer to the Indicative Close Price and other available CAS data points to track the auction.
Note: The Indicative Close Price is an indicative auction price & may change as orders are placed or modified. It should not be considered the final closing price until the CAS is completed.
Where can you access these updates?
- 5paisa Web Platform: Available from 21st August 2026
- 5paisa Mobile App: Available from 21st August 2026 on the latest version v6.1.4
- 5paisa 2.0 New Mobile App: These updates will be available soon.
CAS Dashboard - Available on Web from 1st September 2026
Which stocks does this apply to?
Any stock that has F&O contracts available on NSE or BSE is covered under CAS. All other stocks continue exactly as before.
The revised timings will be effective from Monday, 3rd August 2026.
| Activity | Revised Timing | Current Timing |
|---|---|---|
| Normal Market Close (CAS Eligible Stocks) | 3:15 PM | 3:30 PM |
| Normal Market Close (Non-CAS Eligible Stocks) | 3:30 PM | 3:30 PM |
| F&O Market Close | 3:40 PM | 3:30 PM |
| MIS/BO/CO Auto Square-off (Equity & F&O) | 3:05 PM | 3:15 PM |
| Reference Price Calculation / Transition from Continuous Trading Session (CTS) to Closing Auction Session (CAS) | 3:15 PM – 3:20 PM | – |
| CAS Order Entry/ Modification/ Cancellation (Limit & Market Orders) | 3:20 PM – 3:25 PM | – |
| CAS Order Entry/ Modification/ Cancellation (Limit Orders Only*) | 3:25 PM – 3:30 PM | – |
| Order Matching & Trade Confirmation | 3:30 PM – 3:35 PM | – |
| Transition from CAS to post closing session | 3:35 PM – 3:50 PM | – |
| Post Close Session | 3:50 PM – 4:00 PM | 3:40 PM – 4:00 PM |
*During 3:25 PM to 3:30 PM, only Limit Orders will be accepted. Market Orders cannot be modified or cancelled during this period. This session closes randomly between 3:28 pm and 3:30 PM to avoid last-minute flooding of orders.
Key takeaways for you:
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The Closing Auction Session (CAS) will initially be applicable to stocks with derivative (F&O) contracts.
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Only Limit Orders and Market Orders will be permitted during CAS. Iceberg Orders and Stop-Loss Orders will not be accepted.
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The revised MIS/BO/CO (Equity & F&O) auto square-off timing will be 3:05 PM, while the F&O market will remain open until 3:40 PM.
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For CAS eligible securities, the closing price shall be determined based on the equilibrium price discovered during the CAS. If the equilibrium price is not discovered, the closing reference price shall be considered as the closing price for that security
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For securities on which CAS is not appliable, closing price shall continue to be determined as per existing mechanism, i.e. VWAP of last 30 minutes of the Continuous Trading Session (CTS).
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Closing price for all CAS eligible and CAS non eligible securities shall be disseminated together.
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During the Closing Auction Session, the applicable price band will be ±3% from the reference price.
We request you to take note of these changes and plan your trading activities accordingly.
List of CAS eligible scrips (NSE & BSE):
| Symbol | Company Name |
|---|---|
| 360ONE | 360 ONE WAM LIMITED |
| ABB | ABB INDIA LIMITED |
| ABCAPITAL | ADITYA BIRLA CAPITAL LTD. |
| ADANIENSOL | ADANI ENERGY SOLUTION LTD |
| ADANIENT | ADANI ENTERPRISES LIMITED |
| ADANIGREEN | ADANI GREEN ENERGY LTD |
| ADANIPORTS | ADANI PORT & SEZ LTD |
| ADANIPOWER | ADANI POWER LTD |
| ALKEM | ALKEM LABORATORIES LTD. |
| AMBER | AMBER ENTERPRISES (I) LTD |
| AMBUJACEM | AMBUJA CEMENTS LTD |
| ANGELONE | ANGEL ONE LIMITED |
| APLAPOLLO | APL APOLLO TUBES LTD |
| APOLLOHOSP | APOLLO HOSPITALS ENTER. L |
| ASHOKLEY | ASHOK LEYLAND LTD |
| ASIANPAINT | ASIAN PAINTS LIMITED |
| ASTRAL | ASTRAL LIMITED |
| AUBANK | AU SMALL FINANCE BANK LTD |
| AUROPHARMA | AUROBINDO PHARMA LTD |
| AXISBANK | AXIS BANK LIMITED |
| BAJAJ-AUTO | BAJAJ AUTO LIMITED |
| BAJAJFINSV | BAJAJ FINSERV LTD. |
| BAJAJHLDNG | BAJAJ HOLDINGS & INVS LTD |
| BAJFINANCE | BAJAJ FINANCE LIMITED |
| BANDHANBNK | BANDHAN BANK LIMITED |
| BANKBARODA | BANK OF BARODA |
| BANKINDIA | BANK OF INDIA |
| BDL | BHARAT DYNAMICS LIMITED |
| BEL | BHARAT ELECTRONICS LTD |
| BHARATFORG | BHARAT FORGE LTD |
| BHARTIARTL | BHARTI AIRTEL LIMITED |
| BHEL | BHEL |
| BIOCON | BIOCON LIMITED. |
| BLUESTARCO | BLUE STAR LIMITED |
| BOSCHLTD | BOSCH LIMITED |
| BPCL | BHARAT PETROLEUM CORP LT |
| BRITANNIA | BRITANNIA INDUSTRIES LTD |
| BSE | BSE LIMITED |
| CAMS | COMPUTER AGE MNGT SER LTD |
| CANBK | CANARA BANK |
| CDSL | CENTRAL DEPO SER (I) LTD |
| CGPOWER | CG POWER AND IND SOL LTD |
| CHOLAFIN | CHOLAMANDALAM IN & FIN CO |
| CIPLA | CIPLA LTD |
| COALINDIA | COAL INDIA LTD |
| COCHINSHIP | COCHIN SHIPYARD LIMITED |
| COFORGE | COFORGE LIMITED |
| COLPAL | COLGATE PALMOLIVE LTD. |
| CONCOR | CONTAINER CORP OF IND LTD |
| CROMPTON | CROMPT GREA CON ELEC LTD |
| CUMMINSIND | CUMMINS INDIA LTD |
| DABUR | DABUR INDIA LTD |
| DALBHARAT | DALMIA BHARAT LIMITED |
| DELHIVERY | DELHIVERY LIMITED |
| DIVISLAB | DIVI S LABORATORIES LTD |
| DIXON | DIXON TECHNO (INDIA) LTD |
| DLF | DLF LIMITED |
| DMART | AVENUE SUPERMARTS LIMITED |
| DRREDDY | DR. REDDY S LABORATORIES |
| EICHERMOT | EICHER MOTORS LTD |
| ETERNAL | ETERNAL LIMITED |
| FEDERALBNK | FEDERAL BANK LTD |
| FORCEMOT | FORCE MOTORS LIMITED |
| FORTIS | FORTIS HEALTHCARE LTD |
| GAIL | GAIL (INDIA) LTD |
| GLENMARK | GLENMARK PHARMACEUTICALS |
| GMRAIRPORT | GMR AIRPORTS LIMITED |
| GODFRYPHLP | GODFREY PHILLIPS INDIA LT |
| GODREJCP | GODREJ CONSUMER PRODUCTS |
| GODREJPROP | GODREJ PROPERTIES LTD |
| GRASIM | GRASIM INDUSTRIES LTD |
| GVT&D | GE VERNOVA T&D INDIA LTD |
| HAL | HINDUSTAN AERONAUTICS LTD |
| HAVELLS | HAVELLS INDIA LIMITED |
| HCLTECH | HCL TECHNOLOGIES LTD |
| HDFCAMC | HDFC AMC LIMITED |
| HDFCBANK | HDFC BANK LTD |
| HDFCLIFE | HDFC LIFE INS CO LTD |
| HEROMOTOCO | HERO MOTOCORP LIMITED |
| HINDALCO | HINDALCO INDUSTRIES LTD |
| HINDPETRO | HINDUSTAN PETROLEUM CORP |
| HINDUNILVR | HINDUSTAN UNILEVER LTD. |
| HINDZINC | HINDUSTAN ZINC LIMITED |
| HYUNDAI | HYUNDAI MOTOR INDIA LTD |
| ICICIBANK | ICICI BANK LTD. |
| ICICIGI | ICICI LOMBARD GIC LIMITED |
| ICICIPRULI | ICICI PRU LIFE INS CO LTD |
| IDEA | VODAFONE IDEA LIMITED |
| IDFCFIRSTB | IDFC FIRST BANK LIMITED |
| IEX | INDIAN ENERGY EXC LTD |
| INDHOTEL | THE INDIAN HOTELS CO. LTD |
| INDIANB | INDIAN BANK |
| INDIGO | INTERGLOBE AVIATION LTD |
| INDUSINDBK | INDUSIND BANK LIMITED |
| INDUSTOWER | INDUS TOWERS LIMITED |
| INFY | INFOSYS LIMITED |
| INOXWIND | INOX WIND LIMITED |
| IOC | INDIAN OIL CORP LTD |
| IREDA | INDIAN RENEWABLE ENERGY |
| IRFC | INDIAN RAILWAY FIN CORP L |
| ITC | ITC LTD |
| JINDALSTEL | JINDAL STEEL LIMITED |
| JIOFIN | JIO FIN SERVICES LTD |
| JSWENERGY | JSW ENERGY LIMITED |
| JSWSTEEL | JSW STEEL LIMITED |
| JUBLFOOD | JUBILANT FOODWORKS LTD |
| KALYANKJIL | KALYAN JEWELLERS IND LTD |
| KAYNES | KAYNES TECHNOLOGY IND LTD |
| KEI | KEI INDUSTRIES LTD. |
| KFINTECH | KFIN TECHNOLOGIES LIMITED |
| KOTAKBANK | KOTAK MAHINDRA BANK LTD |
| KPITTECH | KPIT TECHNOLOGIES LIMITED |
| LAURUSLABS | LAURUS LABS LIMITED |
| LICHSGFIN | LIC HOUSING FINANCE LTD |
| LICI | LIFE INSURA CORP OF INDIA |
| LODHA | LODHA DEVELOPERS LIMITED |
| LT | LARSEN & TOUBRO LTD. |
| LTF | L&T FINANCE LIMITED |
| LTM | LTM LIMITED |
| LUPIN | LUPIN LIMITED |
| M&M | MAHINDRA & MAHINDRA LTD |
| MANAPPURAM | MANAPPURAM FINANCE LTD |
| MANKIND | MANKIND PHARMA LIMITED |
| MARICO | MARICO LIMITED |
| MARUTI | MARUTI SUZUKI INDIA LTD. |
| MAXHEALTH | MAX HEALTHCARE INS LTD |
| MAZDOCK | MAZAGON DOCK SHIPBUIL LTD |
| MCX | MULTI COMMODITY EXCHANGE |
| MFSL | MAX FINANCIAL SERV LTD |
| MOTHERSON | SAMVRDHNA MTHRSN INTL LTD |
| MOTILALOFS | MOTILAL OSWAL FIN LTD |
| MPHASIS | MPHASIS LIMITED |
| MUTHOOTFIN | MUTHOOT FINANCE LIMITED |
| NAM-INDIA | NIPPON L I A M LTD |
| NATIONALUM | NATIONAL ALUMINIUM CO LTD |
| NAUKRI | INFO EDGE (I) LTD |
| NBCC | NBCC (INDIA) LIMITED |
| NESTLEIND | NESTLE INDIA LIMITED |
| NHPC | NHPC LTD |
| NMDC | NMDC LTD. |
| NTPC | NTPC LTD |
| NYKAA | FSN E COMMERCE VENTURES |
| OBEROIRLTY | OBEROI REALTY LIMITED |
| OFSS | ORACLE FIN SERV SOFT LTD. |
| OIL | OIL INDIA LTD |
| ONGC | OIL AND NATURAL GAS CORP. |
| PAGEIND | PAGE INDUSTRIES LTD |
| PATANJALI | PATANJALI FOODS LIMITED |
| PAYTM | ONE 97 COMMUNICATIONS LTD |
| PERSISTENT | PERSISTENT SYSTEMS LTD |
| PETRONET | PETRONET LNG LIMITED |
| PFC | POWER FIN CORP LTD. |
| PGEL | PG ELECTROPLAST LTD |
| PHOENIXLTD | THE PHOENIX MILLS LTD |
| PIDILITIND | PIDILITE INDUSTRIES LTD |
| PIIND | PI INDUSTRIES LTD |
| PNB | PUNJAB NATIONAL BANK |
| PNBHOUSING | PNB HOUSING FIN LTD. |
| POLICYBZR | PB FINTECH LIMITED |
| POLYCAB | POLYCAB INDIA LIMITED |
| POWERGRID | POWER GRID CORP. LTD. |
| POWERINDIA | HITACHI ENERGY INDIA LTD |
| PREMIERENE | PREMIER ENERGIES LIMITED |
| PRESTIGE | PRESTIGE ESTATE LTD |
| RADICO | RADICO KHAITAN LTD |
| RBLBANK | RBL BANK LIMITED |
| RECLTD | REC LIMITED |
| RELIANCE | RELIANCE INDUSTRIES LTD |
| RVNL | RAIL VIKAS NIGAM LIMITED |
| SAIL | STEEL AUTHORITY OF INDIA |
| SBICARD | SBI CARDS & PAY SER LTD |
| SBILIFE | SBI LIFE INSURANCE CO LTD |
| SBIN | STATE BANK OF INDIA |
| SHREECEM | SHREE CEMENT LIMITED |
| SHRIRAMFIN | SHRIRAM FINANCE LIMITED |
| SIEMENS | SIEMENS LTD |
| SOLARINDS | SOLAR INDUSTRIES (I) LTD |
| SONACOMS | SONA BLW PRECISION FRGS L |
| SRF | SRF LTD |
| SUNPHARMA | SUN PHARMACEUTICAL IND L |
| SUPREMEIND | SUPREME INDUSTRIES LTD |
| SUZLON | SUZLON ENERGY LIMITED |
| SWIGGY | SWIGGY LIMITED |
| TATACONSUM | TATA CONSUMER PRODUCT LTD |
| TATAELXSI | TATA ELXSI LIMITED |
| TATAPOWER | TATA POWER CO LTD |
| TATASTEEL | TATA STEEL LIMITED |
| TCS | TATA CONSULTANCY SERV LT |
| TECHM | TECH MAHINDRA LIMITED |
| TIINDIA | TUBE INVEST OF INDIA LTD |
| TITAN | TITAN COMPANY LIMITED |
| TMPV | TATA MOTORS PASS VEH LTD |
| TORNTPHARM | TORRENT PHARMACEUTICALS L |
| TRENT | TRENT LTD |
| TVSMOTOR | TVS MOTOR COMPANY LTD |
| ULTRACEMCO | ULTRATECH CEMENT LIMITED |
| UNIONBANK | UNION BANK OF INDIA |
| UNITDSPR | UNITED SPIRITS LIMITED |
| UNOMINDA | UNO MINDA LIMITED |
| UPL | UPL LIMITED |
| VBL | VARUN BEVERAGES LIMITED |
| VEDL | VEDANTA LIMITED |
| VMM | VISHAL MEGA MART LIMITED |
| VOLTAS | VOLTAS LTD |
| WAAREEENER | WAAREE ENERGIES LIMITED |
| WIPRO | WIPRO LTD |
| YESBANK | YES BANK LIMITED |
| ZYDUSLIFE | ZYDUS LIFESCIENCES LTD |
If you have any questions or require assistance, please reach out to our Customer Support Team at support@5paisa.com.
Thank you for choosing 5paisa.
Warm Regards,
Team 5paisa