What is the difference between Bulk deals, Block deals, and Insider trading & SAST?

What is the difference between Bulk deals, Block deals, and Insider trading & SAST?

In the Bulk/Block deals section, FYERS groups large and important trades into three categories: Bulk deals, Block deals, and Insider trading & SAST. Each tells you a different story about who traded, how big the trade was, and why it matters.

Explanation

  • Bulk deals show large trades executed during normal market hours.
  • Block deals show very large trades executed in a special exchange window.
  • Insider trading & SAST shows trades and disclosures made by promoters, insiders, and major shareholders.

Bulk deals

  • A bulk deal happens when a single trade is 0.5% or more of a company’s total shares.
  • These trades happen during regular market hours.
  • Bulk deals are often done by institutions like mutual funds or FIIs.
  • They can move the stock price because of their size.

Block deals

  • A block deal is a very large trade, usually worth ₹10 crore or more.
  • It happens in a separate trading window decided by the exchange.
  • The price is fixed between buyer and seller before the trade.
  • Block deals reduce sudden price swings in the open market.

Insider trading & SAST

  • This includes trades by promoters, directors, key management, and large shareholders.
  • SAST disclosures are required when shareholding crosses certain percentage limits.
  • These trades are reported to the exchange after they happen.
  • They help investors track changes in promoter or insider ownership.

FYERS Web

Path: Markets → Analytics → Bulk/Block deals

  1. Select Bulk deals, Block deals, or Insider trading & SAST at the top.
  2. Use Universe (for example, Nifty 100) to limit the stocks shown.
  3. Change the Date range to view older or recent deals.
  4. Click a row to understand who traded, how much, and the deal value.

FYERS App

Path: Markets → Analytics → Bulk/Block deals

  1. Tap Bulk deals, Block deals, or Insider trading & SAST.
  2. Use the filter icon to change Universe or Date range.
  3. Scroll the table to see client name, action (buy/sell), stake traded, and deal value.

Notes

  • Bulk and block deals show large market transactions, not regular trades.
  • Insider & SAST data is disclosure-based and may appear after the trade date.
  • A large deal does not always mean bullish or bearish intent; context matters.

What if…

SituationWhat to do / How to read it
Same stock appears multiple timesLarge trades can be split across multiple entries or reported as revised disclosures.
Insider trade shows DisposalThis means the insider or promoter has sold shares, reducing their holding.
Block deal price differs from market priceBlock deals are pre-negotiated and may be at a premium or discount.

Last updated: 19 Dec 2025

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