Understanding Bulk and Block Deals
Large investors move big quantities through bulk and block deals. Here’s what they are and what they signal.
On this page
Bulk and block deals are large transactions by big investors — mutual funds, FIIs, promoters, HNIs — that exchanges disclose publicly. Watching them gives a window into what large players are doing.
Bulk deal
A bulk deal is a trade (or a day’s cumulative trades by one client) exceeding 0.5% of a company’s shares, done in the normal market. Because it happens on the open exchange, it can affect the day’s price. Exchanges disclose bulk deals after market hours.
Block deal
A block deal is a large, pre-negotiated trade executed in a separate block deal window at a price within a set band, with a minimum value threshold. Because it’s done privately in that window, it doesn’t disturb the regular market price. Block deals are also disclosed.
What they signal — with caution
- A reputed fund or investor buying a large block can indicate conviction.
- A promoter or large holder selling heavily can be worth noting.
- But context matters — a sale might be for liquidity, estate or fund-redemption reasons, not a view on the company. One deal isn’t a verdict.
Practical use
- Treat bulk/block-deal data as one input, not a trading signal to copy blindly.
- Watch for patterns (repeated accumulation or exits) rather than single trades.
- Combine with fundamentals — smart money can be wrong too.
Disclosure of these deals is part of market transparency. Education only, not a recommendation.
