Know your Options
From time to time we are asked about option strategies. There are many different types of option strategy, and the merits of any given one depends very much on the particular strategy and the circumstances, but there are a few general principles that are worth keeping in mind. These include:-
– Buying or writing options is a zero sum game. This means that when one person sells an option to another, one of them will win and the other will lose. This is in contrast to ordinary shares where it’s reasonable for all long-term investors to expect a positive return
– Who wins and who loses will be determined by a combination of skill and luck. The skill component lies in correctly valuing the option (and to some extent the underlying asset). The luck component reflects the inherently random nature of share price movements in the short term
– Some investors believe they can predict short term share price movements. We don’t have this skill (and are yet to be convinced that others do) so this doesn’t feature in our analysis
If you accept these principles, there are some general conclusions that follow. These include:-
– It only makes sense to use option strategies as a way to increase profits if you are more skilled at valuing the option than the person taking the other side of the trade. If not, it’s like playing backgammon against a talented opponent: you may roll some double-sixes and win a few games, but continue playing long enough and your opponent will get the better of you
– You generally won’t know who is taking the other side of the trade. It’s probably best to assume they know what they’re doing
– On the other hand, it may well make sense to use options to manage risk. If you particularly want to avoid a loss that would result from a specific change in prices, options may provide the protection you need. Just be aware that there will be a price to pay for this protection