Trading desk with stock market screen highlighting a bulk deal of 78,000 shares, a printed insider trading disclosure document, and a smartphone showing a block deal notification.

Bulk/Block Deals & Insider Activity

Bulk deals, block deals, and insider activity reveal how major investors and company insiders move money in the market. Here’s a simple guide for retail investors to understand these signals in 2025.

Every day, thousands of trades happen on Indian stock exchanges. But sometimes, a few big trades stand out: bulk deals, block deals, and insider activity. These moves can tell investors a lot about what’s happening behind the scenes — if they know how to read them.

Bulk Deals: When Big Investors Make Their Moves

A bulk deal happens when an investor buys or sells shares that make up more than 0.5% of a company’s equity in a single day.

  • These are reported to the stock exchanges the same day.
  • Bulk deals often involve big institutional investors, foreign funds, or high-net-worth individuals.
  • If you see a reputed fund buying, it can be a sign of confidence in the company. But if they’re selling, it may raise questions.

Example: If an investor picks up 10 lakh shares of a mid-cap IT firm, that counts as a bulk deal — and traders immediately take notice.

Block Deals: Private Negotiations in a Window

A block deal is different. It’s a single trade of at least ₹10 crore worth of shares, done through a special trading window in the morning session.

  • These deals are often pre-arranged between two parties.
  • They allow large shareholders to buy or sell without causing wild swings in the stock price.
  • Since both buyer and seller are known, block deals usually reflect strategic moves — like promoters offloading shares or investors building a position.

Example: A private equity fund selling a stake in a listed bank to another institutional investor through a block deal.

Insider Activity: Signals From Within

Insider activity refers to trading done by company insiders — directors, promoters, or employees who have access to non-public information.

  • Insiders must disclose their trades to the exchanges under SEBI rules.
  • A promoter buying shares may show confidence in future performance.
  • But insider selling doesn’t always mean trouble — it could be for personal reasons like diversification.

Tracking insider activity helps investors understand how management itself views the company’s prospects.

Bulk Deals vs Block Deals vs Insider Activity

Quick reference for retail investors (India, 2025)
Bulk Deals Block Deals Insider Activity
Threshold: >= 0.5% of company equity in a single day
How: Normal market; multiple trades allowed
Who: FIIs, DIIs, HNIs
Disclosure: Same day on exchanges
Signal: Large accumulation/distribution
Caution: One-off flows may reverse
Minimum Size: ≥ ₹10 crore single trade
How: Special morning block window
Who: Promoters, PE funds, institutions
Disclosure: Reported by exchange post-trade
Signal: Pre-negotiated, strategic stake moves
Caution: May not reflect broad demand
Who: Promoters, directors, key employees
Rules: SEBI PIT; trading windows, reporting
Disclosure: Exchanges via insider filings
Signal: Management confidence (buy) or liquidity (sell)
Caution: Sales can be for personal reasons
Best Use: Confirm with fundamentals/earnings
Example: Fund buys 0.8% of a mid-cap in cash market Example: ₹150 cr promoter offload to an institution at negotiated price Example: Promoter adds shares before a long-term capex cycle
Tip: Track volume spikes + delivery % + VWAP Tip: Compare block price vs last close for sentiment Tip: Look for repeated buys across months, not one-offs
⚠️ Note: Signals are informative, not guarantees. Always pair with company fundamentals, valuation, and risk controls.

For everyday traders, bulk deals and block deals are like footprints of big money. They don’t guarantee future returns, but they show where institutional money is flowing. Insider trades, meanwhile, provide transparency about how company executives are handling their stakes.

In a volatile market, these signals are often used as a compass — but investors should remember to combine them with fundamentals, not treat them as shortcuts.

Bulk deals, block deals, and insider activity aren’t just technical terms. They’re windows into the confidence — or caution — of the biggest players in the market. For retail investors, the lesson is simple: follow the signals, but don’t follow blindly.

Share: WhatsApp X Facebook LinkedIn

Leave a Reply

Your email address will not be published. Required fields are marked *