Bulk Deal vs Block Deal: Meaning, Key Differences & Real Example
When you read stock market news, you may come across headlines such as:
"Mutual Fund Buys ₹500 Crore Worth of Shares in Bulk Deal"
"Promoter Sells ₹500 Crore Worth of Shares Through Block Deal"
But what exactly are Bulk Deals and Block Deals? How are they different, and why should retail investors pay attention?
Understanding the Bulk Deal vs Block Deal difference helps investors track institutional buying, promoter selling and large stock market transactions. It also prevents a common mistake: counting the same transaction twice.
Let us understand these concepts in simple English, with a real stock market example.
1. What Is a Bulk Deal?
A Bulk Deal happens when a single investor buys or sells at least 0.5% of a company's total listed shares during one trading day.
Simple example:
Suppose ABC Ltd has 10 crore shares.
0.5% of its shares = 5 lakh shares.
If an investor buys 6 lakh shares in one trading day, it qualifies as a bulk deal.
The transaction may happen through multiple orders during normal market trading.
Why is it important?
Bulk deals help investors identify large purchases or sales by mutual funds, foreign investors, promoters and other major investors.
However, a bulk deal does not automatically mean the stock will rise or fall.
2. What Is a Block Deal?
A Block Deal is a large share transaction executed through a special trading window on the stock exchange.
Unlike normal market trades, buyers and sellers arrange large transactions under specific exchange rules.
Key rules:
Minimum deal value: ₹25 crore.
Morning trading window: 8:45 AM–9:00 AM.
Afternoon trading window: 2:05 PM–2:20 PM.
Simple example:
Suppose a promoter wants to sell ₹100 crore worth of shares.
A mutual fund agrees to purchase those shares.
Instead of selling them through normal trading orders, they can execute the transaction through the special block deal window.
Why is it important?
Block deals can reveal large ownership changes, institutional purchases, promoter stake sales and exits by major investors.
3. Bulk Deal vs Block Deal: Key Differences
Bulk Deal | Block Deal |
Based on share quantity (0.5% or more) | Based on transaction value (₹25 crore or more) |
Normal market trading | Special trading windows |
Can involve multiple orders | Large transaction executed under block deal rules |
Reveals significant daily buying/selling | Reveals large negotiated transactions |
4. Real Example: Welspun Living — September 2026
On 23 September 2026, Welspun Living's promoter group entity sold approximately 2.45 crore shares worth ₹525.88 crore.
This represented 2.59% of the company.
The promoter holding declined from 65.85% to 63.26%.
Who purchased the shares?
Fidelity International Small Cap Fund: Approximately ₹478 crore.
Quant Mutual Fund: Approximately ₹48 crore.
These purchases together matched the promoter's block sale.
Why Did This Transaction Appear in Both Reports?
The promoter sold 2.59% of the company's shares through a block deal.
Since the quantity exceeded the 0.5% bulk deal threshold, the same transaction also qualified for bulk deal reporting.
Therefore, investors may see:
Block Deal Report: Promoter sold ₹525.88 crore.
Bulk Deal Report: Promoter sold ₹525.88 crore.
Important: This is ONE sale, not TWO sales.
Actual selling = ₹525.88 crore.
Wrong calculation = ₹1,051.76 crore.
Counting both entries separately would double the actual selling amount.
5. What Should Retail Investors Check?
Before making any investment decision based on bulk or block deals:
Identify the buyer: Is it a respected mutual fund, FII, promoter or other investor?
Identify the seller: Is a promoter reducing ownership or an existing institution exiting?
Check for duplicate transactions: Compare the date, quantity, price and investor names.
Look for repeated buying: Consistent purchases across multiple dates may provide a stronger signal than one large transaction.
Check company fundamentals: Institutional buying alone is not a reason to purchase a stock.
Final Takeaway
Bulk Deals tell us WHO traded a significant percentage of a company's shares.
Block Deals tell us WHO executed a large transaction through a special exchange window.
One transaction can qualify as both.
For retail investors, the most important lesson is simple:
Don't just look at how much money was traded. Find out who is buying, who is selling, and whether the transaction is genuinely new.
That is how bulk and block deal reports become useful for investment research.
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This article is for educational purposes only and does not constitute a recommendation to buy or sell any security. Institutional buying or selling alone should not determine investment decisions.
