Choosing Strikes
I get asked numerous questions when on the road about strike selection. For the most part, most swimmers understand the criteria of putting on a trade, but they don't understand which strikes to choose. Thus, I have come up with some of my own rules that I implement when I trade. You have to understand that we are premium sellers. That is the basis of how we make our money and how we put probability on our side. Once you understand that and truly believe it, the rest becomes easier.
First, I go to the Trade Tab on the TOS platform to set my information layouts to Probability of Expiring and Delta to determine which strike I want to sell. Personally, I look to sell the 35 delta, or namely 35% Probability of Expiring, and I buy the 25% Probability of Expiring, or 25 delta options against them for protection. In this instance, I have chosen the XLE 92/94 call vertical to sell. This usually involves me selling a two-strike wide call or put vertical, depending upon my directional bias. Yes, even though I am an anti-chartite, I do have directional biases. Why do I choose two-strike wide intervals as opposed to one-strike wide? For me, it comes down to the amount of credit, or premium, that I am selling. Usually, if I am comfortable selling 10 one-strike wide verticals, then I will sell 5 two-strike wide verticals to collect approximately the same premium while saving on commissions. Don't tell anybody I told you that.
I must, however, be aware that I will feel some "heat" on this position before it expires. This is known as Probability of Touching, and is usually twice the value of the Probability of Expiring. In my example up above, if my short strike has a Probability of Expiring of 35%, then the stock has approximately a 70% chance of touching my short strike before expiration. But remember, stocks move throughout the life of your positions. The only guarantee I will make you is this: If you always have a stop price set at your short strike, you will lose money! If this isn't clear, then go back to the Probability of Touching to see that 70% of the time your stop will be activated.
With that in mind, we have eliminated an adjustment many people make, Stop Orders. I don't like them, and I don't use them. Remember, your vertical acts as a defined risk order with a natural stop in it, your long strike. So, why add another stop on top of that especially when you now know how to read the Probability of Touching number.
Best of luck trading Swimmers. Next week I will return to my Alcoa example to show you a trade I like to make going into earnings season.
thinkorswim, Inc. and its registered employee, Joe Mazzola, do not solicit or recommend any form of trading in the individual stocks (or their derivatives) mentioned above. Please do careful, independent research before investing any money as well as weigh the possible consequences on your particular financial situation before doing so. The risk of loss may be substantial.








