Bulk Deals vs Block Deals: How They Differ in India
A bulk deal is any trade where one client’s total buy or sell quantity in a single stock on a single day crosses 0.5% of that company’s equity shares listed on the exchange. A block deal is a single negotiated trade of at least Rs 10 crore, executed in a separate block deal window that sits outside the normal order book.
Both are reported by NSE and BSE, which is why you keep seeing headlines like “foreign fund buys 12 lakh shares in a bulk deal”. People use the two terms as if they mean the same thing. They do not, and the difference changes how you should read the data.
What Counts as a Bulk Deal
The 0.5% test is the entire definition. Cross it, and your trade becomes a bulk deal that the exchange will publish with your name on it. Two details trip people up:
- It is measured per client, per stock, per day, and separately for buying and selling. Twelve small trades adding up to 0.6% count. One trade of 0.4% does not.
- The denominator is total listed equity shares, not free float. Where promoters hold 70%, half a percent of listed shares is a large chunk of what actually trades.
Bulk deals happen during normal trading hours, in the same order book you use. Your broker has to report the deal to the exchange, within about an hour if the threshold is crossed in one trade, and after the close if the position builds through the session. The exchange then publishes the client name, the stock, buy or sell, quantity and weighted average price.
How a Block Deal Works
A block deal is a pre-negotiated trade between two parties, punched into a special window so a large order does not smash through the live price. SEBI’s framework sets a minimum order value of Rs 10 crore, raised from Rs 5 crore in the 2017 revision.
There are two windows in a trading day:
- A morning window before the normal market opens, roughly 8:45 am to 9:00 am. The reference price is the previous day’s closing price.
- An afternoon window, roughly 2:05 pm to 2:20 pm. Here the reference price is the volume weighted average price of that stock between 1:45 pm and 2:00 pm.
Orders have to be priced within plus or minus 1% of that reference price. Each order must be for the full quantity at one price, orders here are not visible in the normal order book, and trades settle on a gross basis. Timings and the minimum value come from circulars and do get revised, so check the current NSE or BSE circular.
Bulk Deal vs Block Deal at a Glance
| Feature | Bulk deal | Block deal |
|---|---|---|
| Trigger | More than 0.5% of listed equity shares in a day | Minimum order value of Rs 10 crore |
| Where it executes | Normal market, normal hours | Separate block deal window, twice a day |
| Price limit | Normal circuit and price band rules | Within 1% of the reference price |
| Visible while trading | Yes, it sits in the live order book | No, the window has its own order book |
| Settlement | Netted with your other trades | Gross, delivery is compulsory |
| Disclosure | Within an hour or after close, by the broker | Published by the exchange after the close |
Reading the Daily Files Without Fooling Yourself
NSE and BSE both publish bulk deal and block deal data every day, free. Each row gives you the stock, the client, buy or sell, quantity and average price. Nothing more.
An illustrative example
Say a company has 20 crore equity shares listed. Half a percent is 10 lakh shares, worth about Rs 145 crore at Rs 1,450 a share. These are illustrative numbers, not a live quote. The same 0.5% threshold means very different rupee amounts in a small cap and a large cap.
Match the two sides
Often only one side shows up. A fund selling 0.6% to fifteen buyers appears as one sell entry and no buy entry, because no single buyer crossed the threshold. Do not assume a mystery buyer is accumulating quietly.
What This Data Does Not Tell You
This is where most retail readers go wrong.
- Disclosure comes after the price has already moved. You are reading history, not a signal you can front run.
- A buyer name means little on its own. It could be an index fund rebalancing, a proprietary desk, or an arbitrage book hedged in futures.
- A block deal at a 1% discount to the reference price is normal pricing for size, not evidence that someone is dumping.
- This reporting is separate from disclosures under the SEBI Takeover Regulations, where an acquirer crossing 5% of a company has to report the holding.
Treat both datasets as context for a story you already understand. They help you spot a change in who owns a company, and they are useless as a buy or sell trigger by themselves.
Frequently Asked Questions
Can a retail investor trade in the block deal window?
The window is open to anyone whose broker offers access, but the Rs 10 crore minimum order value puts it out of reach for almost every individual. In practice it is used by institutions and promoters.
Is a bulk deal the same as insider trading?
No. A bulk deal is a large trade that crosses a disclosure threshold, and that disclosure is what keeps it transparent. Insider trading is dealing on unpublished price sensitive information, which is prohibited regardless of trade size.
Do bulk deal rules apply to futures and options?
No. Both are cash segment mechanisms tied to a company’s listed equity shares. Positions in the derivatives segment are governed instead by position limits and margin rules.
Why do promoters prefer a block deal over selling in the open market?
It places a large quantity at one agreed price with a known counterparty, without walking the price down over days. The trade off is the 1% price band and the need to find a buyer for the whole lot.
Key Takeaways
- Bulk deal means more than 0.5% of listed shares traded by one client in a day, in the normal market.
- Block deal means one order of at least Rs 10 crore in a separate window, priced within 1% of a reference price.
- Bulk deal quantities are added up across the day; a block deal is one order at one price.
- Both are disclosed after the fact, so they explain a move rather than predict one.
- Thresholds and timings come from circulars, so verify current figures before acting.
