Share Market Knowledge Part - 6

Orders, Execution and Trading Mechanics 

Glimplse: This section explains how buy and sell orders work, how exchanges execute trades, and how traders manage execution prices and order conditions in the Indian stock market. 

 

121. Market Order

Meaning: A market order is an instruction to buy or sell a security at the best available prices in the market when the order reaches the exchange.

How it works: When a market buy order is placed, it generally matches with available sell orders, starting with the lowest available asking price. A market sell order generally matches with available buy orders, starting with the highest available bid price.

The final execution price depends on available liquidity, market conditions and the quantity being traded.

Use in the Indian share market: Traders may use market orders when immediate execution is more important than controlling the exact price.

Practical example: A stock is showing an available selling price of ₹250. A trader places a market buy order for 100 shares. If sufficient sell orders are available, the order may execute around ₹250. If liquidity is limited or prices move quickly, some shares could execute at higher prices.

Risk to understand: The last traded price is not a guarantee of the execution price. Market orders can experience slippage, especially in volatile or illiquid stocks.

122. Limit Order

Meaning: A limit order is an instruction to buy or sell a security at a specified price or a better price.

How it works:

• A buy limit order sets the maximum price the buyer is willing to pay.

• A sell limit order sets the minimum price the seller is willing to accept.

The order executes only when compatible orders are available and the exchange's matching rules permit execution.

Use in the Indian share market: Limit orders help investors control the price at which they are willing to transact.

Practical example: A stock is trading at ₹520. An investor places a buy limit order at ₹510. The order may execute if compatible selling interest becomes available at ₹510 or lower. It may remain unexecuted if the price never reaches a suitable level.

Important distinction: A limit order controls the acceptable price, but it does not guarantee execution.

123. Stop-Loss Order

Meaning: A stop-loss order is an order arrangement intended to help limit losses or protect existing gains when the market moves against a position.

How it works: A trigger price activates the order according to the order type and broker or exchange rules. Depending on the product and available order types, the activated order may be a market order or a limit order.

Use in the Indian share market: Traders commonly use stop-loss orders to define an exit condition before entering a trade.

Practical example: A trader buys a stock at ₹400 and sets a stop trigger at ₹390. If the relevant trigger condition is reached, the stop-loss arrangement activates according to its rules.

Risk to understand: A stop-loss does not guarantee a maximum loss of ₹10 per share. If the price moves sharply, a market-type stop order may execute below ₹390. A stop-limit order may fail to execute if the market moves beyond its limit price.

124. Stop-Loss Market Order

Meaning: A stop-loss market order is an arrangement in which reaching the trigger price activates a market order, subject to the applicable product and order rules.

How it works: Once the trigger condition is met, the order seeks execution against available orders in the market. The execution price can differ from the trigger price.

Use in the Indian share market: Where this order type is available, traders may use it when they prioritise exiting a position over obtaining an exact price.

Practical example: A trader holds a stock bought at ₹600 and sets an applicable stop trigger at ₹585. If the trigger is reached, the activated market order may execute around ₹585, but a sudden price gap could result in a lower selling price.

Important consideration: Availability and permitted order types can vary by segment, broker and exchange rules. Confirm the current facilities offered by your trading platform.

125. Stop-Loss Limit Order

Meaning: A stop-loss limit order combines a trigger price with a limit price.

How it works: When the trigger condition is met, the order becomes a limit order. It can execute only at the specified limit price or a better price, subject to available liquidity.

Use in the Indian share market: Traders may use this arrangement when they want an exit order to respect a price boundary, while accepting that execution is not guaranteed.

Practical example: A trader owns a stock currently trading near ₹300 and sets a sell trigger at ₹290 with a limit price of ₹288. If the trigger activates, the sell order can execute at ₹288 or higher. If the price falls rapidly below ₹288, the order may remain unexecuted.

Key trade-off: A market-type stop order prioritises execution but can have greater price uncertainty. A stop-limit order provides more price control but carries the risk of non-execution.

126. Intraday Order

Meaning: An intraday order is an order placed as part of a trading strategy that opens and closes a position within the same trading day.

How it works: Traders buy and sell eligible securities or take permitted short positions within the applicable intraday trading framework. Brokers may impose their own risk controls and square-off procedures.

Use in the Indian share market: Intraday traders attempt to benefit from short-term price movements without intending to carry the position overnight.

Practical example: A trader buys 200 shares at ₹150 and sells them at ₹152 on the same day. The gross trading profit is ₹400 before brokerage, taxes, charges and any other applicable costs.

Risk to understand: Intraday trading can produce rapid losses. Broker square-off times, margin requirements and permitted short-selling arrangements vary, so traders should verify the applicable rules.

127. Delivery Order

Meaning: A delivery order generally refers to a stock purchase intended to be held beyond the trading session, with the securities credited to the investor's demat account after settlement.

How it works: The investor buys eligible shares and meets the required funds obligation. After settlement, the securities are credited according to the applicable process. The investor can then hold or sell them, subject to the relevant rules.

Use in the Indian share market: Delivery-based transactions are commonly used for investing over days, months or years.

Practical example: An investor purchases 50 shares at ₹800 each and holds them for six months. The initial share value is ₹40,000 before charges. The eventual profit or loss depends on the sale price, dividends received and transaction costs.

Important distinction: Delivery-based investing does not mean the investment is safe or guaranteed to appreciate. Share prices can fall substantially even over long periods.

128. CNC — Cash and Carry

Meaning: CNC is a broker-specific product label commonly used for delivery-oriented equity transactions. Its precise meaning and treatment depend on the broker's platform.

How it works: When an investor selects CNC for an eligible equity order, the transaction is generally intended to result in a delivery-based holding rather than an intraday position. The order remains subject to exchange rules, settlement requirements and the broker's processes.

Use in the Indian share market: Investors may select CNC when buying shares they intend to hold rather than automatically close within the same session.

Practical example: An investor selects CNC to buy 30 shares of a company at ₹500 each. If the order executes and settlement is completed, the shares can be credited to the investor's demat account.

Important point: CNC is a platform label, not a universal guarantee that an order will execute or that every transaction will be treated identically across brokers. Read the broker's product terms.

129. MIS — Margin Intraday Square-off

Meaning: MIS is a product label used by some Indian brokers for intraday trading. It is commonly associated with positions intended to be closed during the trading session.

How it works: The broker applies its margin, risk-management and square-off rules to eligible MIS positions. Depending on the broker and instrument, an open position may need to be closed before the relevant deadline.

Use in the Indian share market: Traders may select MIS when placing an eligible intraday order rather than a delivery-oriented order.

Practical example: A trader buys 100 shares at ₹250 using an MIS product. If the trader sells at ₹253, the gross profit is ₹300 before charges. The position must be managed according to the broker's intraday rules.

Risk to understand: Broker square-off procedures can close positions at unfavourable prices. Margin availability does not reduce the underlying market risk, and MIS conditions can differ among brokers.

130. Order Book

Meaning: An order book is a record of active buy and sell orders for a security that have not yet been fully executed or cancelled.

How it works: The exchange organises orders according to its matching rules, including price and applicable priority rules. The order book changes as new orders arrive, existing orders are modified or cancelled, and trades occur.

Use in the Indian share market: Traders examine the order book to understand visible buying and selling interest near the current market price.

Practical example: A stock's visible buy orders include bids at ₹99.90, ₹99.80 and ₹99.70, while sell orders are available at ₹100.00, ₹100.10 and ₹100.20. This information helps a trader understand the visible prices at which orders may be matched.

Limitation: The order book shows visible orders, not every participant's intentions. Orders can be cancelled, liquidity can change quickly, and displayed depth does not guarantee future price direction.

131. Bid Price

Meaning: The bid price is the highest price currently offered by a buyer in the visible order book for a particular security.

How it works: Buyers submit orders stating the price and quantity they are willing to purchase. The highest eligible bid generally represents the best visible buying price.

Use in the Indian share market: Traders use the bid price to assess available buying interest and estimate the price at which a market sell order might begin executing.

Practical example: If the best bid is ₹245 and the best ask is ₹246, the visible bid is ₹245. A market sell order may initially match against buy orders at ₹245, depending on available quantities and market conditions.

Important distinction: The bid price is not necessarily the last traded price or the price at which an investor's entire order will execute.

132. Ask Price

Meaning: The ask price, also called the offer price, is the lowest price currently offered by a seller in the visible order book.

How it works: Sellers submit orders specifying the prices and quantities at which they are willing to sell. The lowest eligible ask generally represents the best visible selling price.

Use in the Indian share market: Buyers use the ask price to understand the visible cost of purchasing immediately from available sellers.

Practical example: If a stock has a best bid of ₹410 and a best ask of ₹411, a buyer placing a market order may initially purchase at ₹411, assuming sufficient quantity is available.

Practical point: A displayed ask price may apply only to a small quantity. A larger market order may execute at several prices.

133. Bid-Ask Spread

Meaning: The bid-ask spread is the difference between the best visible ask price and the best visible bid price.

Formula:

\[ \text{Bid-Ask Spread}=\text{Best Ask}-\text{Best Bid} \]

How it works: The spread reflects the gap between the price buyers are currently offering and the price sellers are currently requesting.

Use in the Indian share market: Traders use the spread as one indicator of transaction costs and market liquidity. A narrower spread often indicates more competitive visible prices, while a wider spread can indicate weaker liquidity or greater uncertainty.

Practical example: If the best bid is ₹198 and the best ask is ₹200:

\[ ₹200-₹198=₹2 \]

The spread is ₹2 per share.

Why it matters: A trader buying at ₹200 and immediately selling at ₹198 would lose ₹2 per share before brokerage and other charges, assuming those prices remain available and the orders execute at those prices.

134. Market Depth

Meaning: Market depth describes the quantities of buy and sell orders available at different price levels in an order book.

How it works: Trading platforms may display several bid levels and ask levels, together with their corresponding quantities. Greater visible depth can allow larger orders to execute with less price impact, although this is not guaranteed.

Use in the Indian share market: Traders study market depth when assessing liquidity, planning order sizes and estimating how a large order might interact with available orders.

Practical example: Stock A has 20,000 shares available across nearby price levels, while Stock B has only 500 shares. A large order may be easier to execute in Stock A without moving through as many price levels, assuming the displayed orders remain available.

Limitation: Market depth is dynamic. Displayed orders can be cancelled, and visible quantities do not reveal all potential future orders or hidden liquidity.

135. Liquidity

Meaning: Liquidity refers to how easily an asset can be bought or sold without causing a substantial change in its price.

How it works: Securities with active trading, many willing buyers and sellers, and substantial available quantities often have better liquidity. Liquidity can vary by stock, time of day, market conditions and order size.

Use in the Indian share market: Investors consider liquidity when selecting stocks, deciding order sizes and planning exits. It is particularly important for traders who need to enter and leave positions quickly.

Practical example: A heavily traded large-cap stock may have many buyers and sellers near the current price. A thinly traded small-cap stock may have fewer orders and a wider bid-ask spread.

Risk consideration: Low liquidity can make it difficult to exit a position at a desired price. A stock that appears inexpensive may still be unsuitable for a large trade if trading volume and market depth are limited.

136. Slippage

Meaning: Slippage is the difference between an expected or reference execution price and the actual price at which a trade executes.

How it works: Slippage can occur when prices move between order placement and execution, when an order consumes available quantities at several price levels, or when market liquidity is insufficient.

Use in the Indian share market: Traders monitor slippage to evaluate execution quality, especially in intraday strategies, volatile stocks and automated trading systems.

Practical example: A trader expects to buy 500 shares at ₹100, but the order executes at an average price of ₹100.30.

The additional purchase cost is:

\[ 500\times(₹100.30-₹100)=₹150 \]

This ₹150 is the adverse slippage cost relative to the expected price, excluding other charges.

How to manage it: Consider limit orders where appropriate, assess market depth, avoid oversized orders in illiquid stocks and include realistic execution costs in backtests.

Important point: Slippage can be favourable or adverse. Historical backtests that assume perfect execution may substantially overstate a strategy's real-world performance.

137. Partial Execution

Meaning: Partial execution occurs when only part of an order's requested quantity is filled.

How it works: An order may be matched against available compatible orders for less than the full quantity. The remaining quantity may stay open, be cancelled or be handled according to the order's validity and exchange rules.

Use in the Indian share market: Traders monitor partial executions to ensure that their actual position matches their trading plan.

Practical example: An investor places an order to buy 1,000 shares, but only 400 shares are available at acceptable prices. The investor may receive an execution for 400 shares, while the remaining 600 shares remain pending if the order conditions permit.

Why it matters: If a strategy assumes a position of 1,000 shares but only 400 are executed, its actual exposure and profit-and-loss calculation will be different. Automated trading systems must track executed quantity rather than assuming every order fills completely.

138. Order Validity

Meaning: Order validity specifies how long an order remains active or the conditions under which it can remain available for execution.

How it works: Depending on the security segment, exchange rules and broker facilities, an order may be valid for the trading day or follow another permitted validity condition.

Use in the Indian share market: Order validity helps traders determine whether an unexecuted order will remain active or expire.

Practical example: A trader places a day-valid limit order to buy a stock at ₹150. If the order does not execute before the applicable end-of-day processing, it will generally expire under the day-order conditions.

Important consideration: Validity options are not identical across all brokers, instruments and market segments. Check the order settings before submission rather than assuming an order will remain active until the target price is reached.

139. IOC — Immediate or Cancel

Meaning: IOC stands for Immediate or Cancel. It is an order validity instruction under which an order attempts to execute immediately, with any unexecuted portion cancelled according to the applicable exchange rules.

How it works: When the order reaches the exchange, it can match with available compatible orders. Any quantity that cannot be executed under the IOC instruction is cancelled rather than remaining open as an ordinary pending order.

Use in the Indian share market: Eligible traders may use IOC orders when they want immediate execution opportunities without leaving the unfilled balance resting in the order book.

Practical example: A trader places an IOC buy order for 1,000 shares. If 600 shares can be executed immediately under the order conditions, the remaining 400 shares are cancelled.

Important distinction: IOC does not guarantee full execution. It is a validity instruction, not a guarantee of price or quantity.

140. GTT — Good Till Triggered

Meaning: GTT stands for Good Till Triggered. It is a broker-platform feature that can store an order instruction until a specified trigger condition is reached, subject to the broker's terms and applicable rules.

How it works: The investor sets a trigger condition and other required order details. When the trigger is reached, the platform attempts to place or activate the associated order according to its design. The triggered order may still require exchange execution and can fail or remain unfilled.

Use in the Indian share market: Investors may use GTT-style features to prepare conditional buy or sell orders without continuously watching the market.

Practical example: A stock is trading at ₹500. An investor configures an eligible GTT instruction to trigger a buy order if the price reaches ₹480. If the trigger condition is satisfied, the platform attempts to submit the configured order.

Important limitations:

• GTT availability and duration depend on the broker.

• A trigger is not the same as a completed trade.

• The order may not execute if the market moves rapidly or sufficient liquidity is unavailable.

• Corporate actions, exchange restrictions, insufficient funds and order-validity rules may affect whether an instruction remains active or can be executed.