Mastering NISM Series VIII: Chapter 6 — Introduction to Trading Systems (Part 1)

1. Introduction to Trading Entities and Market Structure

In the Indian equity derivatives market, transactions are executed, cleared, and settled by various designated entities. Understanding the distinct roles and boundaries of these market participants is essential for both operational efficiency and clearing security.

Trading Members (TM)

• Definition: Trading Members (TM) are registered members of Stock Exchanges who are authorised to trade on the exchange platform.
• Scope of Activity: They can execute trades either on behalf of their registered clients or for their own proprietary accounts (proprietary trading).
• Identification: The exchange assigns a unique Trading Member ID to each registered member to track all trade activities.
• User Management: A single trading member firm is allowed to have more than one registered user or terminal on the system.

Clearing and Settlement Entities

While Trading Members execute transactions, the clearing and settlement of those trades must be handled by a authorised Clearing Member (CM) through the Clearing Corporation. Based on their clearing rights and affiliations, these entities are classified into three distinct categories:

1. Trading cum Clearing Member (TCM):
   • A TCM is a Clearing Member (CM) who also holds Trading Member (TM) status on the exchange.
   • They have the authority to clear and settle their own proprietary trades, trades executed for their direct clients, as well as trades executed by other TMs who do not have clearing rights, and trades of Custodial Participants (CP).
2. Self-Clearing Member (SCM):
   • An SCM is also a Trading Member (TM) on the exchange who possesses clearing rights.
   • Unlike a TCM, an SCM is restricted to clearing and settling only their own proprietary trades and their direct clients' trades. They are strictly prohibited from clearing or settling trades executed by other TMs.
3. Professional Clearing Member (PCM):
   • A PCM acts purely as a clearing and settlement entity and is not a Trading Member of the exchange.
   • Typically, large financial institutions, banks, or custodians register as PCMs to clear and settle trades for associate TMs as well as for Custodial Participants (CP).

Participants

• Definition: A Participant is defined as the client of a Trading Member.
• Custodial Participants (CP): Institutions and specific large entities can execute their trades through any registered Trading Member, but choose to have those trades cleared and settled through their own designated Clearing Member (CM). These entities are known as Custodial Participants.

Comparison of Trading and Clearing Entities

2. Market Timing and Corporate User Hierarchy

The equity derivatives segment in India operates under strict temporal and administrative controls to maintain market integrity and manage operational risk.

Market Timing

• The derivatives segment is open for trading on all working days between 9:15 AM and 3:30 PM.

Corporate User Hierarchy

To ensure proper risk management and operational control within a brokerage firm, the trading system enforces a strict three-tier corporate user hierarchy. This hierarchy defines the levels of access, order placement capabilities, and risk limit controls for different users within the trading member's firm.

1. Corporate Manager (Level 1)

• Status: This is the highest administrative and operational level within a trading member firm.
• Functions & Permissions: The Corporate Manager has unrestricted access to perform all order and trade-related activities. They receive real-time reports for all branches and all individual dealers affiliated with the trading member firm.
• Exclusive Limit Setting: The Corporate Manager has the exclusive authority to define and assign exposure limits for the various branches of the firm. This limit-definition facility is available solely to users at this level.

2. Branch Manager (Level 2)

• Status: Positioned directly under the Corporate Manager in the administrative hierarchy.
• Functions & Permissions: The Branch Manager is responsible for overseeing a specific branch of the brokerage. They can perform and view order and trade-related activities for all dealers assigned to that specific branch. They do not have access to data from other branches of the firm.

3. Dealer (Level 3)

• Status: This is the lowest operational level in the corporate user hierarchy.
• Functions & Permissions: A Dealer operates a local trading terminal. A Dealer can only view and manage their own orders and trades. They are strictly barred from accessing information, orders, or trades belonging to other dealers in their own branch or other branches.

3. Client-Broker Relationship

The Client-Broker Relationship represents the fundamental legal and regulatory framework governing interactions between trading members and their clients. While this heading is established as part of the trading system introduction in Chapter 6, the detailed compliance guidelines, risk disclosures, and mandatory client registration documentation are integrated with general sales practices and regulatory mandates. These standards ensure transparency, prevent unauthorised trading, and require that clients are fully apprised of the leveraged risks associated with derivative contracts.

4. Types of Orders in the Derivatives Market

To facilitate precise execution strategies, the trading platform supports several types of orders, which are classified by their duration, execution conditions, and pricing constraints.

Day Order

• Definition: An order whose validity is confined to the current trading day.
• System Action: If a Day Order is not executed during the trading hours, the trading system automatically cancels it at the end of the day.

Immediate or Cancel (IOC) Order

• Definition: An order requiring that the contract be bought or sold immediately upon its release into the trading system.
• System Action: Any portion of the IOC order that cannot be matched immediately in the market is instantly cancelled by the system. It does not sit in the order book.

Limit Order

• Definition: An order to buy or sell a contract at a specified price limit.
• Execution Rule: The order can only be executed at the specified limit price or a better price. For a buy limit order, execution occurs at the limit price or lower; for a sell limit order, execution occurs at the limit price or higher.

Market Order

• Definition: An order to buy or sell a contract immediately at the best available bid or offer price in the market.
• Execution Rule: The user does not specify a price at the time of placing the order. The system matches it against the prevailing market depth immediately.

Stop-Loss Order

• Definition: A defensive order designed to limit a trader's loss on an open position.
• Execution Rule: The order remains inactive until the market price of the security climbs above or drops below a pre-specified trigger price. Once the trigger price is reached, the order is activated and released into the trading system as an active market or limit order to close or hedge the position.

5. Order Matching Mechanism on F&O Platforms

The Indian derivatives segment utilizes advanced, automated exchange systems to ensure fair and transparent order execution.

• Order-Driven Market: In India, F&O platforms operate strictly as an order-driven market. This means that the market price is determined by the direct interaction of buy and sell orders, rather than being set by designated market makers.
• Automatic Matching Rule: Orders are matched automatically based on a strict price-time priority basis.
  • Price Priority: The highest buy order and the lowest sell order always receive the highest execution priority.
  • Time Priority: If multiple orders exist at the same price, the order that was entered first (earliest time stamp) is executed first.
• Processing Flow:
  1. As soon as an order is received by the trading system, it is immediately time-stamped.
  2. The system immediately processes the order to check for a potential match against opposing orders.
  3. If a match is found, a trade is executed. If a match is not found, the order is stored in different 'books' (order books) based on its specifications, waiting for a matching counter-order.

6. Key Terms and Exam Takeaways

• Trading Member ID: A unique identification code assigned by the exchange to track and audit all transactions executed by a Trading Member.
• Corporate Hierarchy Level 1 (Corporate Manager): The only user level authorised to define branch exposure limits.
• Self-Clearing Member (SCM) Restriction: SCMs can clear only proprietary and own client trades; they cannot clear other TMs' trades.
• Price-Time Priority: The primary algorithm of the automated matching engine where orders are prioritised by price first, and then by the exact sequence of their time stamps.
• Order Driven Market: A market structure where order matching is entirely automated based on price and time priority without mandatory quote providers.