Quote from erol:
I'm trying to think of ways to make money on earnings, but I haven't figured it out yet.
Anyways, I'll look into these, really appreciate it.
Here's a generic description of the process.
Identify EA stocks with increased overall IV. Check option chains for horizontal skew in front 2 months ( > 15 BPs). If you find a few, check graph in IVolatility to see what historic level is and how much they imploded post EA in the past.
Input data into option model where you can select post EA IV guesstimate to see how the strategy performs one day later (not expiration). As a general rule, you don't want to hang around hoping for a better result. It is what it is the next AM.
What the ratio is and what strikes are used is a trial and error process since there are multiple variables (time to expiration, skew and amount of IV collapse ). The idea is to tweak the number of options and the strikes used in order to get a risk graph that's acceptable. The premiums determine that. You can tilt the bias up, down or balance it. Balanced means that you have no clue which direction it's going

You can also use what I call kickers (buy a cheap OTM strike to shift bias or manage extreme movement risk).
Use all combo order combinations to leg in. For example, a calendar strangle is also a pair of OTM calendars or a pair of diagonals. It's not unusual to get a 10-20 cts better fill with one (use price alerts) and yet either way gets you to the same final position. 20 cts on both sides can make a big difference in the attractiveness of a risk graph.
Keep in mind that you can and should use stock the pre/post market to defend your position. An example of this would be your aforementioned double butterfly. Suppose after the EA, FSLR exceeds a max profit point, say less than 90. If it continues down past 90, you're giving up profit. If it gets below 80, you incur losses. Know your delta and short some stock if necessary. Make sure to be watching the stock during and after the conference call since it can set things off again.
I prefer AM releases since overnight can bring surprises but a majority of the good ones are PM releases.
Getting out the next morning is an art in and of itself. Closing everything at market prices is convenient and safe. But if you have a handle on discipline and risk tolerance, you can leg out. This is not for noobs or deer in the headlight types. IV often drops "X" initially and then "Y" throughout the morning. You might consider closing some of the long leg(s) ASAP for less loss (more gain) while IV is higher and scaling out short legs as IV continues to drop (for more gain/less loss).
Adjustments is a whole nuther story. For ex, you can mutate a diagonal into a butterfly or a diagonalized butterfly. I'll leave that one alone
Finding these critters is time intensive but the end result is higher probability trades.