Clients are encouraged to consider the use of limit orders in lieu of market orders as market orders are susceptible to being filled at prices far lower/higher than the current displayed bid/ask particularly under volatile market conditions, in the case of large order quantities and/or orders involving illiquid products. To protect the client as well as IB from losses associated with significant and rapidly changing prices, IB may simulate client market orders as market with protection orders, establishing an execution cap percentage points beyond the inside bid/ask. While this cap is set at a level that is intended to balance the objectives of execution certainty and minimizing price risk, there exists a remote possibility that the execution will be delayed or may not take place.
In addition, it should also be noted that certain exchanges impose, as a protective measure, their own price caps or bands upon market orders, at levels which can be more or less restrictive than those imposed by IB and which may similarly affect the speed and certainty of order execution.
A combination order is a special type of order that is constructed of multiple separate positions, or ‘legs’, but executed as a single transaction. The legs of the combination may be comprised of the same position type (e.g. stock vs. stock, option vs. option or SSF vs. SSF) or different position types (e.g. stock vs. option, SSF vs. option or EFP). It’s important to note that many combination order types, while submitted via the IB trading platform as a combination, are not native to (i.e., supported by) the exchanges and therefore may not be guaranteed by IB. Accordingly, IB’s policy is to guarantee only Smart-Routed U.S. stock vs. option and option vs. option combination orders.
As combination orders which are not guaranteed are exposed to the risk of partial execution, both in terms of the quantity of legs and their balance, IB requires account holders to acknowledge the 'Non-Guaranteed' attribute at the point of order entry. There are two methods for setting this attribute:
Notes:
The risk of such 'Non-Guaranteed' orders is illustrated through the example below:
Example
Assume the following quotes for a Stock vs. Stock combination order to purchase shares of Microsoft (MSFT) and sell shares of Appl (AAPL).
Current markets
MSFT - 26.30 bid, 26.31 offer
AAPL - 250.25 bid, 250.30 offer
A generic combination is created to buy 1 share AAPL and sell 1 share MSFT, the implied quote would be 223.94 bid, 224 offer.
The following order is entered:
Buy 200 AAPL, Sell 200 MSFT
Pay 224
Based on the current markets, the order would appear to be executable.
With a Non-Guaranteed combination, the 100 shares of AAPL would be placed in the client account, even though no MSFT shares were executed. The remainder of the combination order will continue to work until executed in its entirety or until it is canceled.
Order types which provide privacy by either hiding the entire order quantity (i.e., Hidden Orders) or allowing the display of only a specified portion of the submitted order quantity (i.e., Iceberg/Reserves) are not supported for all product types and venues.
Examples of venues for which Hidden and Iceberg/Reserve stock orders are not supported are Pink Sheet and OTCBB. Hidden or Iceberg/Reserve orders submitted to these venues will be rejected and will generate the following message: "Order quantity must be fully displayed for this instrument". Orders receiving this rejection message will require the removal of any hidden or display size attribute prior to resubmission.
Additional information regarding product types and venues for which these order types are supported is available through the links below:
Iceberg/Reserve:
http://individuals.interactivebrokers.com/en/trading/orders/iceberg.php?ib_entity=llc
Hidden :
http://individuals.interactivebrokers.com/en/trading/orders/hidden.php?ib_entity=llc
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