Table Of Contents:

How do I provide exercise instructions?

Do I have to notify IBKR if I want my long option exercised?

What if I have a long option which I do not want exercised?

What can I do to prevent the assignment of a short option?

Is it possible for a short option which is in-the-money not to be assigned?

What happens if I have a spread position with an in-the-money option and an out-of-the-money option?

Can IBKR exercise the out-of-the-money long leg of my spread position only if my in-the-money short leg is assigned?

What happens to my long stock position if a short option which is part of a covered write is assigned?

Am I charged a commission for exercise or assignments?

What happens if I am unable to meet the margin requirement on a stock delivery resulting from an option exercise or assignment?

Q&A:

How do I provide exercise instructions?
Instructions are to be entered through the TWS Option Exercise window. Procedures for exercising an option using the IBKR Trader Workstation can be found in the TWS User's Guide.

Important Note: In the event that an option exercise cannot be submitted via the TWS, an option exercise request with all pertinent details (including option symbol, account number and exact quantity), should be created in a ticket via the Account Management window. In the Account Management Message Center click on "Compose" followed by "New Ticket". The ticket should include the words "Option Exercise Request" in the subject line. Please provide a contact number and clearly state in your ticket why the TWS Option Exercise window was not available for use.

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Do I have to notify IBKR if I want my long option exercised?

In the case of exchange listed U.S. securities options, the clearinghouse (OCC) will automatically exercise all cash and physically settled options which are in-the-money by at least $0.01 at expiration (e.g., a call option having a strike price of $25.00 will be automatically exercised if the stock price is $25.01 or more and a put option having a strike price of $25.00 will be automatically exercised if the stock price is $24.99 or less). In accordance with this process, referred to as exercise by exception, account holders are not required to provide IBKR with instructions to exercise any long options which are in-the-money by at least $0.01 at expiration. 

Important Note: in certain situations (e.g., underlying stock halt, corporate action), OCC may elect to remove a particular class of options from the exercise by exception process, thereby requiring the account holder to provide positive notice of their intent to exercise their long option contracts regardless of the extent they may be in-the-money. In these situations, IBKR will make every effort to provide advance notice to the account holder of their obligation to respond, however, account holders purchasing such options on the last day of trading are not likely to be afforded any notice.

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What if I have a long option which I do not want exercised?
If a long option is not in-the-money by at least $0.01 at expiration it will not be automatically exercised by OCC. If it is in-the-money by at least that amount and you do not wish to have it exercised, you would need to provide IBKR with contrary instructions to let the option lapse. These instructions would need to be entered through the TWS Option Exercise window prior to the deadline as stated on the IBKR website.

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What can I do to prevent the assignment of a short option?
The only action one can take to prevent being assigned on a short option position is to buy back in the option prior to the close of trade on its last trading day (for equity options this is usually the Friday preceding the expiration date although there may also be weekly expiring options for certain classes). When you sell an option, you provided the purchaser with the right to exercise which they generally will do if the option is in-the-money at expiration.

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Is it possible for a short option which is in-the-money not to be assigned?
While is unlikely that holders of in-the-money long options will elect to let the option lapse without exercising them, certain holders may do so due to transaction costs or risk considerations. In conjunction with its expiration processing, OCC will assign option exercises to short position holders via a random lottery process which, in turn, is applied by brokers to their customer accounts. It is possible through these random processes that short positions in your account be part of those which were not assigned.

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What happens if I have a spread position with an in-the-money option and an out-of-the-money option?
Spread positions can have unique expiration risks associated with them. For example, an expiring spread where the long option is in-the-money by less than $0.01 and the short leg is in-the-money more than $0.01 may expire unhedged. Account holders are ultimately responsible for taking action on such positions and responsible for the risks associated with any unhedged spread leg expiring in-the-money.

Can IBKR exercise the out-of-the-money long leg of my spread position only if my in-the-money short leg is assigned?
No. There is no provision for issuing conditional exercise instructions to OCC. OCC determines the assignment of options based upon a random process which is initiated only after the deadline for submitting all exercise instructions has ended. In order to avoid the delivery of a long or short underlying stock position when only the short leg of an option spread is in-the-money at expiration, the account holder would need to either close out that short position or consider exercising an at-the-money long option.

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What happens to my long stock position if a short option which is part of a covered write is assigned?
If the short call leg of a covered write position is assigned, the long stock position will be applied to satisfy the stock delivery obligation on the short call. The price at which that long stock position will be closed out is equal to the short call option strike price.

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Am I charged a commission for exercise or assignments?
There is no commissions charged as the result of the delivery of a long or short position resulting from option exercise or assignment of a U.S. security option (note that this is not always the case for non-U.S. options).

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What happens if I am unable to meet the margin requirement on a stock delivery resulting from an option exercise or assignment?
You should review your positions prior to expiration to determine whether you have adequate equity in your account to exercise your options. You should also determine whether you have adequate equity in the account if an in-the-money short option position is assigned to your account. You should also be aware that short options positions may be exercised against you by the long holder even if the option is out-of-the-money.

If you anticipate that you will be unable to meet the margin requirement on a stock delivery resulting from an option exercise or assignment, you should either close positions or deposit additional funds to your account to meet the anticipated post-delivery margin requirement.

IBKR reserves the right to prohibit the exercise of stock options and/or close short options if the effect of the exercise/assignment would be to place the account in margin deficit. To protect against these scenarios as expiration nears, IBKR will simulate the effect of expiration assuming plausible underlying price scenarios and evaluating the exposure of each account assuming stock delivery. If the exposure is deemed excessive, IBKR reserves the right to either:

• Liquidate options prior to expiration. Please note: While IBKR retains the right to liquidate at any time in such situations, liquidations involving US security positions will typically begin at approximately 9:40 AM ET as of the business day following expiration;
• Allow the options to lapse; and/or
• Allow delivery and liquidate the underlying at any time.

In addition, the account may be restricted from opening new positions to prevent an increase in exposure. IBKR determines the number of contracts that will be lapsed by IBKR/auto-exercised shortly after the end of trading on the date of expiration. The effect of any after hours trading you conduct on that day may not be taken into account in this exposure calculation.

While IBKR reserves the right to take these actions, account holders are solely responsible for managing the exercise/assignment risks associated with the positions in their accounts. IBKR is under no obligation to manage such risks for you.

For more information, please see Expiration & Corporate Action Related Liquidations

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Interactive Brokers supports cash settled standard warrants listed for trading on the SWX Swiss exchange.  This includes  a number of share warrants and all index, commodity and currency warrants.

Share Warrants with physical delivery are not supported at this time.

Position limits are defined on regulatory websites and may change periodically.  Some contracts also have near-term limit requirements (near-term position limits are applied to the side of the market for those contracts that are in the closest expiring month issued).  Traders are responsible for monitoring their positions as well as the defined limit quantities to ensure compliance.  The following information defines how position limits are calculated;

Option position limits are determined as follows:

• Bullish market direction -- long call & short put positions are aggregated and quantified in terms of equivalent shares of stock.

• Bearish market direction -- long put & short call positions are aggregated and quantified in terms of equivalent shares of stock.

The following examples, using the 25,000 option contract limit, illustrate the operation of position limits:

• Customer A, who is long 25,000 XYZ calls, may at the same time be short 25,000 XYZ calls, since long and short positions in the same class of options (i.e., in calls only or in puts only) are on opposite sides of the market and are not aggregated
• Customer B, who is long 25,000 XYZ calls, may at the same time be long 25,000 XYZ puts. Rule 4.11 does not require the aggregation of long call and long put (or short call and short put) positions, since they are on opposite sides of the market.
• Customer C, who is long 20,000 XYZ calls, may not at the same time be short more than 5,000 XYZ puts, since the 25,000 contract limit applies to the aggregate position of long calls and short puts in options covering the same underlying security. Similarly, if Customer C is also short 20,000 XYZ calls, he may not at the same time have a long position of more than 5,000 XYZ puts, since the 25,000 contract limit applies separately to the aggregation of short call and long put positions in options covering the same underlying security.

Notifications and restrictions:

IB will send notifications to customers regarding the option position limits at the following times:

• When a client exceeds 85% of the allowed limit IB will send a notification indicating this threshold has been exceeded
• When a client exceeds 95% of the allowed limit IB will place the account in closing only. This state will be maintained until the account falls below 85% of the allowed limit. New orders placed that would increase the position will be rejected.

Notes:

Position limits are set on the long and short side of the market separately (and not netted out).
Traders can use an underlying stock position as a "hedge" if they are over the limit on the long or short side (index options are reviewed on a case by case basis for purposes of determining which securities constitute a hedge).
Position information is aggregated across related accounts and accounts under common control.

Definition of related accounts:

IB considers related accounts to be any account in which an individual may be viewed as having influence over trading decisions. This includes, but is not limited to, aggregating an advisor sub-account with the advisor's account (and accounts under common control), joint accounts with individual accounts for the joint parties and organization accounts (where an individual is listed as an officer or trader) with other accounts for that individual.

Position limit exceptions:

Regulations permit clients to exceed a position limit if the positions under common control are hedged positions as specified by the relevant exchange. In general the hedges permitted by the US regulators that are recognized in the IB system include outright stock position hedges, conversions, reverse conversions and box spreads. Currently collar and reverse collar strategies are not supported hedges in the IB system. For more detail about the permissible hedge exemptions refer to the rules of the self regulatory organization for the relevant product.

OCC posts position limits defined by the option exchanges.   They can be found here.
http://www.optionsclearing.com/webapps/position-limits

The prices which IB uses to mark U.S. listed securities options as of the close of business each day (both TWS and statements) originate from the Options Clearing Corporation (OCC).  As the sole clearinghouse for these option products, OCC generates a closing price for each option contract in order to calculate the margin required of its members on whose behalf it clears transactions (e.g., IB) and also to supply the risk arrays used by brokers carrying portfolio margin accounts.

Its important to note that the prices generated by OCC are edited and therefore may not reflect the closing price as disseminated by any of its participant exchanges.  They are edited primarily due to the fact that there is no consolidated quote provided for options, most of which are multiply listed and fungible across all seven exchanges (i.e., there may be seven different prices to choose from each day).  As a result, OCC creates a single price as of the close which is theoretically consistent across all exchanges and reviewed to ensure that there are no arbitrage conditions across strikes or time. 

In creating prices, OCC will start by taking the mid-point of the highest bid and lowest ask price across all listing exchanges, determining the implied volatility and then smoothing that implied volatility curve (for a given option class, type and expiration) through an iterative process which, in turn, adjusts the option mark prices.  There are also rules enforced to cap volatility for certain deep in and deep out-of-the-money options. The resultant edited price is extended out to six decimal places.  Due to the operational overhead of computing edited prices for the complete universe of option series, this process is performed only once per day as of the market close.