Quote from Teycir:
Where you using bull put credit spreads?
Did you sold options on stocks, indexes, futures? What was your time frame? Can you post an example of your most damaging trade?
I sell call credit spreads (never puts because of the risk of sudden drops in the markets) on NDX and RUT (so I don't worry about early exercise), my time exposure is 2 days. In the current volatile market I'm having much better returns than in jan-july 2011, so I'm having trouble imagining how comes you blow up using such a conservative strategy.
In my experience selling bear call credit spreads is just as problematic as selling bull put credit spreads. The skew means that to get the same money on a bear call spread that you would get for a bull put spread you must use strikes closer to the spot price. Selling any sort of credit spread generally means that you make a little money, make a little money, make a little money, and then BLOW UP.