What is the difference between bulk and block deals?

Block deals happen in a special pre-market window (8:45–9:00 AM), require a minimum of ₹10 crore, and execute within ±1% of the previous close. Bulk deals happen during regular hours, trigger at 0.5% of shares, and execute at market price. Block deals don't move market price; bulk deals do.

Where can I see who bought or sold in a deal?

NSE and BSE publish the buyer/seller name, quantity, and price for all bulk deals by end of day. Block deal participants are also disclosed. aftermarkets shows this data with historical tracking so you can see patterns.

Should I buy a stock after seeing a bulk deal?

Not automatically. A bulk deal shows what one party did, not what will happen next. Use it as confirmation alongside other signals — delivery, conviction, fundamentals. Also check whether the deal is a buy or a sell; bulk deals include both sides.

after·markets

Concepts & Glossary·Beginner·2 min read

What are bulk deals and block deals?

Bulk deals are trades where a single party buys or sells more than 0.5% of a company's shares in one session. Block deals are large pre-market trades negotiated between institutions. Both signal significant position changes by big players.