What I'm curious about is why you didn't start to sell them sooner or at least sell some further out strike to make a vertical spread that would mostly lock in your gains. I missed out on profiting from Friday afternoon's slide because I had closed out half my puts (which I'd bought on Tuesday) on Thursday afternoon and turned the rest into vertical spreads on Friday morning. Not saying my conservative approach was better, but I'm curious why people sit on big bearish gains in a market where corrections have typically lasted just a few hours.