Option Tales: Cheap Options Part II
| 24-05-2016 | Rob Söentken |
Today in Rob Söentken’s Option Tales: When buying options it is tempting to see if the premium expenses can be minimized. A number of solutions are possible, which will be discussed in four articles. In the previous article I talked about the first two solutions: Choose the strike further OTM and Choose shorter tenor. Today I will be discussing the next two solutions: Choose the longer tenor and the Compound option.
3- Choose longer tenor
Following the comparison between a 3-month and a 12-month option, it should be remembered that a 12-month option will have some remaining value after 3 months have passed, at least theoretically. If we assume ‘ceteris paribus’ (everything remained unchanged) the remaining option value of a 12-month option would be 1.1%. If we
bought the option for 1.5%, we could sell it after 3 months at 1.1% and buy the USD through an outright forward transaction. This approach shows that the net cost of option protection would be only 0.4% (1.5% – 1.1%). Which would be cheaper than the premium of a 3-month option with the same Delta. Also, because the option has a higher Delta than a 3-month option with the same strike (25% vs 10%, see diagram 2), it will follow the spot market much better. The bottom line of paragraph 3 is that a longer dated option can be bought with the intention to sell it again at some point, the net cost being less than buying a shorter dated option. While it serves as a hedge against price changes.
4- Compound option
A compound option is the right to buy an option against a certain premium. For example we could be considering to
buy the 1-year option in diagram 2 for 1.5%. Alternatively we could consider buying a right to buy this option for 0.4% in 3 months time. At that time the 1-year option will only have 9 months remaining, but the strike and 1.5% premium are fixed in the contract. On the expiry date of the compound option we can decide if we want to pay 1.5% for the underlying option. Alternatively, assuming nothing has changed, we could buy a 9 month option in the market for 1.1% (see diagram 2). In such a case we wouldn’t exercise the compound option.
An alternative to the compound option would be to buy the 3-month option for 0.2%. On expiry, assuming nothing has changed again, we could buy a 9 month option in the market for 1.1% (see diagram 2).
In my next two articles I will discuss the last two solutions for minimizing premium expenses when buying options:
- Conditional Premium option
- Reverse Knock Out
Would you like to read more in Rob Söentken’s Option Tales?
1. Options are for wimps
2. ATM or OTM
3. Cheap options part 1

Ex-derivatives trader










Should we need to exercise the option to get our USD, it still means a combined hedging cost of 3.8%. Which is more than if we had bought the ATM option for 2% premium. Conclusion: Buying an OTM option reduces the up-front cost versus buying an ATM option. But ex-post hedging with an OTM option could result in total hedging cost which are higher than an ATM option.
option is exercised, or the USD must be purchased from the market at the prevailing rate.
Claire graduated as chemical engineer at the TU Delft. After an internship with JP Morgan she decided to pursue a career in the financial sector. She continued as investment banking trainee with ABN Amro / RBS and for almost six years, half of which in London, she worked in M&A and Corporate Finance. Since 2006 Claire was increasingly involved in renewable energy projects in faraway places (Antarctica, Himalayas) and from there on it was a small step to join Fastned and strengthen the team with her financial expertise.

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