Bulk & Block Deals

Track institutional block trades and open-market bulk transactions on NSE and BSE
Track institutional block trades and open-market bulk transactions on NSE and BSE

Bulk Deals vs Block Deals: Key Differences

Understanding the structural execution mechanics between open-market and dedicated windows.
Understanding the structural execution mechanics between open-market and dedicated windows.

Bulk Deals

Regular Market Hours
Execution MechanismNormal Order Book
Minimum Threshold> 0.5% Total Shares
Price ImpactMoves price in real-time
Disclosure TimelineEnd of Day (EOD)

Block Deals

Dedicated Windows
Execution Windows08:45-09:00 & 14:05-14:20
Minimum Size₹10 Crore Minimum
Price Band±1% of Prev Close / CMP
VisibilitySeparate Order Book

Institutional Alpha Tip: When marquee mutual funds or sovereign funds buy a substantial block at near the day's highs, it indicates high conviction accumulation where size was prioritised over price sensitivity.

Frequently Asked Questions

What is the difference between a Bulk Deal and a Block Deal?

Bulk Deals occur during normal market hours through the regular order book when a single trade exceeds 0.5% of the company's total equity shares, which directly impacts immediate market prices. Block Deals occur during separate dedicated trading windows at a pre-negotiated price (within ±1% of the previous closing price) with a mandatory minimum trade size of ₹10 crore.

Why are Bulk and Block Deals important for investors?

Unlike aggregate institutional flows (FII/DII data), bulk and block deals disclose the exact client name (e.g., Goldman Sachs, SBI Mutual Fund, or Promoter Entities). This reveals specific institutional buying or distribution conviction weeks ahead of quarterly shareholding filings.

Does a bulk buy deal always mean the stock will rise?

Not necessarily. For every buyer, there is a counterparty seller. The bullish signal is strongest when the purchase happens at a price premium to the market, is absorbed by a premier institutional fund, or occurs as cluster buying across multiple consecutive sessions.

What time are Block Deal windows conducted on NSE?

Block deal windows run in two dedicated 15-minute trading sessions: the Morning Window (08:45 AM to 09:00 AM IST) and the Afternoon Window (02:05 PM to 02:20 PM IST).

How can I search for deals in a specific stock?

Type the stock ticker or company name in the search bar above to filter all historical and intraday bulk and block transactions for that company within your chosen date window.

When does the exchange publish Bulk Deal data?

Both NSE and BSE publish full bulk and block deal logs after market close, typically between 06:00 PM and 07:00 PM IST on every trading day.