ninja 7,
good study,i have some comments based on some of my own experience and also from a free webinar given by peter shultz to promote his explosive profits service which uses straddles and strangles.
what was the initial cost of each trade? and what was the stock price at entry? peter talks of a trade off, strangles vs straddles, with initial cost advantage to strangles, but straddles can show a profit sooner. your study seems to demonstrate this.
he also stresses the importance of knowing the volatilty profiles, because vol crush will hurt these positions.
peter says best to use options with 3-6wks till expiry, what did you use?
he also recommends skewing the option selection if you have a directional bias. i see for wag and bby the 3mo trend was down, what if you went closer $ strikes for the puts and further out for the calls? jbl, was just chop all over, hard pressed to make a directional call.
regards