Quote from stevegee58:
Caveat: I'm not saying I trade this for a living or anything, but I'm experimenting with it and it's interesting.
I've been paper trading short calendars as an alternative to straddles. In a normal (long) calendar, you sell the front month and buy the back month, same strike. In a short calendar, you do the opposite; buy the front month and sell the back month.
If you look at a risk graph for this, it looks very much like a straddle. However, it has a major advantage over the straddle: when IV collapses after an earnings report you can actually make money. With a straddle, you lose money unless the stock makes a big move. Usually you get out of a long straddle before earnings because the IV has priced in the expected move. With a short calendar, you can hold it over the announcement.
The main risk is that you're technically holding a naked short because the long front month expires first. It's not a problem as long as you're there to roll the long option to the next month to stay hedged.