If you are doing regular covered call / share renting / buy write strategy then sooner or later you will meet the condition that the stock that being optioned is giving shareholder some dividend. And there are some interesting interaction or behavior that you need to realize during this period. Knowing this little detail will help you adjust your strategy to maximize your profit.

There are 2 main type of covered call that you can do: out-of-money covered call (most popular) and in-the-money covered call, which mainly determined by your view or believe what the price of stock is going to be at the end of option period.
For example: a stock is now trading at $10 and option writer buy the option at that price to do covered call. Let say 1 month covered call for $10.5 strike price will give you 50 cents premium and 1 month covered call for $9.5 strike price will give you $1.0 permium per share (the additional $0.5 is the intrinsic value of the option – the actual premium(time value)/profit will be roughly the same – in this example 50c – in reality there could be some differences depending on the market). Then:
| Price is $11 at option expiry date | ||
| Price per stock | ||
| $9.5 strike price | $10.5 strike price | |
| Stock Buy Price | $10.00 | $10.00 |
| Premium | ||
| intrinsic value | $0.50 | – |
| time value | $0.50 | $0.50 |
| Option excercised? | Yes | Yes |
| Selling Price/ Excercise Price | $9.50 | $10.50 |
| Capital Gain | ||
| Sell: | $9.50 | $10.50 |
| Buy: | $10.00 | $10.00 |
| Net: | -$0.50 | $0.50 |
| Total Premium | $1.00 | $0.50 |
| Total Profit | $0.50 | $1.00 |
| Price is $9 at option expiry date | ||
| Price per stock | ||
| $9.5 strike price | $10.5 strike price | |
| Stock Buy Price | $10.00 | $10.00 |
| Premium | ||
| intrinsic value | $0.50 | – |
| time value | $0.50 | $0.50 |
| Option excercised? | No | No |
| Present Value | $9.00 | $9.00 |
| Capital Gain | ||
| Present Value: | $9.00 | $9.00 |
| Buy: | $10.00 | $10.00 |
| Net: | -$1.00 | -$1.00 |
| Total Premium | $1.00 | $0.50 |
| Total Profit | $0.00 | -$0.50 |
Hence, in the bearish climate -or- if you believe the stock will be heading down, in -the-money covered call would be better choice as it will give more downside protection.
Now what happen if during your covered call period the company is distributing dividend? As you know, the price of the stock *usually* go down on ex-dividend date to self adjust the value of dividend that being taken from the market and only if you buy a stock before the ex-date you are entitled of the dividend, hence:
Whether or not the option is exercised- 1 day before ex-date – is determined by dividend value and the rest of time value of the option.
For example: let say we have:
If he/she exercises the option on 1 day before ex-date and sell it immediately on ex-date:
If he/she just sell(*) the option, profit will be 80c minus the buying price of the option.
Hence, it is unlikely that the option will be exercise since the option holder will be profitable to just sell the option back to market.
For example: the same as Example 1 above, except:
If he/she exercises the option on 1 day before ex-date and sell it immediately on ex-date:
If he/she just sell(*) the option, profit will be 60c minus the buying price of the option.
Hence, it is unlikely that the option will be exercise since the option holder will be profitable to just sell the option back to market.
But as we can see, the difference between exercising and not exercising is now quite close with the diminishing of the time value of the option. If the time value is quite trivial, then there will be very little difference between exercising or not.
If this is the case, then additional motivation such as the option holder want the ownership of the stock (to vote on AGM for example) or other special offer exists, then it will be more profitable for option holder to just exercise the option.
For example: let say we have:
If he/she exercises the option on 1 day before ex-date and sell it immediately on ex-date:
If he/she just sell(*) the option, profit will be 30c minus the buying price of the option.
Hence, it is very unlikely that the option will be exercised.
For example: the same as Example 3 above, except:
If he/she exercises the option on 1 day before ex-date and sell it immediately on ex-date:
If he/she just sell(*) the option, profit will be 60c minus the buying price of the option.
Hence, it is also very unlikely that the option will be exercised .
Note: (*) option need to be sold 1 day before ex date (on the decision day whether to exercise the option or just sell the option) before the price adjusted due to ex-dividend price behavior
If dividend is distributed in the middle of option period: