2.1 Order Types
Understanding different order types is fundamental for securities lawyers advising trading clients. Each order type has specific characteristics affecting execution, risk, and regulatory compliance.
Basic Order Types
| Order Type | Description | Use Case |
|---|---|---|
| Market Order | Execute immediately at best available price | Immediate execution priority over price |
| Limit Order | Execute at specified price or better | Price protection; may not execute |
| Stop-Loss Order | Triggered when price reaches stop price | Risk management; loss limitation |
| Stop-Loss Market | Stop-loss converting to market order | Guaranteed execution at stop trigger |
| Stop-Loss Limit | Stop-loss converting to limit order | Price protection even at stop trigger |
Advanced Order Types
- Immediate or Cancel (IOC): Execute immediately or cancel; no partial execution in order book
- Good Till Cancelled (GTC): Remains active until executed or cancelled by investor
- Good Till Date (GTD): Remains active until specified date
- Day Order: Valid only for the trading day; cancelled at market close
- After Market Order (AMO): Placed outside market hours for next day execution
Orders must be placed within the price band (circuit limit) of the security. Orders outside the band are rejected. Price bands vary from 2% to 20% depending on the security category and are designed to prevent excessive volatility.
Order Modification and Cancellation
Orders can be modified or cancelled before execution:
- Modification: Change price, quantity, or validity; modification time becomes new time priority
- Cancellation: Remove order from order book before execution
- Partial Execution: Remaining quantity stays in order book unless IOC
Pattern of order modifications/cancellations without genuine intent to trade may constitute market manipulation under SEBI (Prohibition of Fraudulent and Unfair Trade Practices) Regulations, 2003.
2.2 Settlement Cycle (T+1)
India transitioned to T+1 settlement in January 2023, becoming one of the first major markets to achieve this milestone. Understanding the settlement process is crucial for advising on trading and clearing matters.
Evolution of Settlement Cycles
T+1 Settlement Process
- T (Trade Day): Trade execution, confirmation, obligation determination
- T+1 Morning: Clearing corporation determines pay-in/pay-out obligations
- T+1 Afternoon: Securities pay-in from sellers through depositories
- T+1 Evening: Funds pay-in from buyers through clearing banks
- T+1 Close: Securities and funds pay-out to buyers and sellers respectively
| Activity | Timeline |
|---|---|
| Trade Execution | T (9:15 AM - 3:30 PM) |
| Trade Confirmation | T (by 5:30 PM) |
| Obligation Generation | T+1 (by 10:00 AM) |
| Securities Pay-in | T+1 (by 10:30 AM) |
| Funds Pay-in | T+1 (by 11:30 AM) |
| Securities Pay-out | T+1 (by 1:30 PM) |
| Funds Pay-out | T+1 (by 2:00 PM) |
T+1 settlement reduces counterparty risk, improves capital efficiency for brokers and investors, and brings India in line with global best practices. However, it requires robust systems and processes from all market participants.
Settlement Failures (Short Delivery)
When a seller fails to deliver securities:
- Auction: Exchange conducts auction to procure securities
- Close-out: If auction fails, settlement at close-out price (highest price in settlement period + applicable premium)
- Penalty: Short delivery attracts financial penalty on the defaulting member
2.3 Margin Requirements
Margin is the collateral required to cover potential losses from trading. Understanding margin requirements is essential for advising clients on trading capacity and risk management.
Types of Margins
| Margin Type | Purpose | Calculation |
|---|---|---|
| VaR Margin | Cover potential loss at 99% confidence | Based on historical volatility |
| Extreme Loss Margin (ELM) | Cover losses beyond VaR | Fixed percentage (3-5%) |
| Mark-to-Market (MTM) | Cover daily price movement | Difference from trade price to closing price |
| Span Margin | Derivatives initial margin | SPAN algorithm based on portfolio risk |
| Exposure Margin | Additional buffer for derivatives | Percentage of notional value |
Peak Margin Requirements
SEBI mandates peak margin reporting to prevent intraday leverage abuse:
- Reporting: Brokers report peak margin four times daily
- Upfront Collection: Minimum margin must be collected before trade execution
- Penalty: Short collection attracts penalty on the broker
- Gradual Implementation: 100% upfront margin collection since September 2021
Clients can pledge securities as margin using the margin pledge facility. Securities are pledged through depositories (NSDL/CDSL) and remain in client's demat account while being marked as pledged. This provides transparency and prevents misuse of client securities.
Margin Shortfall Consequences
- Penalty on Broker: 0.5% per day for shortfall up to Rs. 1 lakh; 1% for higher amounts
- Square-off: Positions may be squared off if margin not maintained
- Trading Restriction: Client may be restricted from taking new positions
- Regulatory Action: Repeated violations may attract SEBI/Exchange action
When advising trading clients, ensure they understand: (1) Total margin requirement before placing trades, (2) MTM obligations can increase margin during the day, (3) Pledged securities provide margin but not funds for settlement, (4) Margin shortfall has financial and trading consequences.
2.4 Circuit Breakers
Circuit breakers are market-wide and stock-specific mechanisms designed to prevent excessive volatility and provide cooling-off periods during rapid price movements.
Index-Based Market-Wide Circuit Breakers
Trading is halted across exchanges when indices move beyond specified limits:
| Movement | Trigger Time Before 1 PM | Trigger Time 1 PM - 2:30 PM | Trigger Time After 2:30 PM |
|---|---|---|---|
| 10% | 45 min halt | 15 min halt | No halt |
| 15% | 1 hr 45 min halt | 45 min halt | Remainder of day |
| 20% | Trading halted for remainder of day | ||
Market-wide circuit breakers are triggered based on movement in BSE SENSEX or NSE NIFTY 50, whichever breaches first. The trigger is calculated from the previous day's closing value of the index.
Stock-Specific Price Bands
| Category | Price Band | Applicable Securities |
|---|---|---|
| No Band | No limit | Securities in derivatives segment |
| 20% Band | +/- 20% | Most liquid securities |
| 10% Band | +/- 10% | Medium liquidity securities |
| 5% Band | +/- 5% | Less liquid / Graded surveillance |
| 2% Band | +/- 2% | Securities under surveillance |
Dynamic Price Bands
For securities without circuit limits (derivatives eligible), dynamic bands operate:
- Operating Range: +/- 10% from base price
- Relaxation: Automatic relaxation if price reaches band and sustains
- Pre-open: Separate band calculation during pre-open session
When a stock hits upper or lower circuit, trading continues but only in the direction opposite to the circuit. A stock at upper circuit can only be sold; a stock at lower circuit can only be bought. This creates liquidity challenges for trapped traders.
2.5 Trading Hours and Sessions
Trading on Indian exchanges is organized into distinct sessions, each with specific purposes and rules. Understanding these sessions is important for advising on order placement and execution strategies.
Equity Market Trading Sessions
| Session | Timing | Purpose |
|---|---|---|
| Pre-open Session | 9:00 AM - 9:15 AM | Price discovery for opening price |
| Normal Market | 9:15 AM - 3:30 PM | Continuous trading |
| Closing Session | 3:40 PM - 4:00 PM | Orders at closing price |
| After Market | 4:00 PM - 9:00 AM | AMO order placement for next day |
Pre-Open Session Details
Pre-Open Session Rules
- Order Types: Only limit and market orders; no stop-loss orders
- Price Band: +/- 20% from previous close (or applicable circuit limit)
- Modification: Orders can be modified/cancelled during entry period
- Opening Price: Determined by call auction mechanism maximizing traded quantity
Special Trading Sessions
- Muhurat Trading: Special session on Diwali (symbolic, auspicious trading)
- Special Sessions: Extended hours for specific events (Budget day, etc.)
- Block Deal Window: 8:45 AM - 9:00 AM for large block trades
- Bulk Deal: During normal market hours (0.5%+ of equity traded)
Block Deals
- Minimum quantity: 5 lakh shares or Rs. 10 crores
- Price: +/- 1% of previous close or current market price
- Window: 8:45 AM - 9:00 AM
- Separate window; does not affect market price
Bulk Deals
- Threshold: 0.5% or more of equity shares
- Traded during normal market hours
- Broker reports to exchange same day
- Disclosed publicly by exchange
Exchanges publish annual calendar of trading holidays. Markets are closed on national holidays, weekends, and special occasions. Settlement timelines adjust for holidays. Always verify trading calendar when advising on time-sensitive transactions.
Key Takeaways
- Order types include market, limit, stop-loss, and specialized orders like IOC and AMO
- India operates on T+1 settlement since January 2023, with strict timelines for pay-in and pay-out
- Margin requirements include VaR, ELM, MTM, and must be collected upfront with peak margin reporting
- Circuit breakers operate at index level (10%, 15%, 20%) and stock level (2% to 20%)
- Trading sessions include pre-open, normal market, closing session, and special windows for block/bulk deals