A block order is a type of order that specifies a range of prices for a security, rather than a single price. It is a type of limit order that allows the trader to specify a minimum and maximum price for the order.

Key Features of Block Orders:

• Price Range: Specifies a range of prices within which the order will be filled.
• Minimum and Maximum Prices: Defines the minimum and maximum prices for the order.
• Execution Price: The price at which the order is filled will be within the specified range.
• Fill or Kill: The order is either filled at the best available price within the range, or it is killed if no price within the range is available.
• Order Type: Block orders are limit orders.
• Time in Force: The time in force for a block order is the same as for any other limit order.

Examples:

• A trader places a block order to buy 100 shares of Apple stock between $100 and $110.
• If the market price of Apple stock reaches $105, the order will be filled at that price.
• If the market price of Apple stock reaches $110, the order will be filled at that price.
• If the market price of Apple stock does not reach either the minimum or maximum price, the order will be killed.

Advantages:

• Sets a Price Range: Allows for a wider range of potential fill prices.
• Reduce Price Impact: May help reduce the impact on market price when placing a large order.
• Increased Flexibility: Can be adjusted to changing market conditions.

Disadvantages:

• Limited Fill Probability: The likelihood of filling the order may be lower than a single-price limit order.
• Complex Order Management: Can be more complex to manage than other order types.
• Potential for Price Fluctuations: Price fluctuations within the range can lead to order fills at unexpected prices.

Note: Block orders are typically used by institutional traders or high-frequency traders who need more flexibility in their order placement.