Quote from jwcapital:
As of 11:40AM ET, the total premium of the Mar 1350 Call and Put is 77.50. So, since your initial total premium was 82, your profit is 4.50 per straddle of one contract. In ES terms, this is a $225.00 profit. While it isn't enough to live on, it is still better than a loss in this market. When the market dropped to 1255, your loss would have been about 50%, and you would have been stopped out based on your 10-30% stop loss limit. I think in this environment, you need to give the short straddle some room to breath--that is why I suggested 60%. If I traded the Mar08 1350 put and call short straddle, the total premium would be 82.00 per single-contract straddle. Based on your data, my profit expectation would be 41.00 per single-contract straddle ($2,050.00). My loss would be 60% (based on my stop-loss suggestion) or about a 48 point loss ($2,400.00). That translates to a risk:reward expectation of about 1:0.85. A number of traders would not approve of this ratio. You gotta believe your expectation for success is higher for this to be a good trade. A 60% loss eliminated your three biggest losses over the 28-month period (losses were 71%, 107%, and 153%). Your next highest low was 54%; that is why I choose 60%; to give the trade room to breath. Please continue expressing your thoughts in this thread.
I think that one should also address the probabilities of win/loss. The more room to breath, the high erthe prob. The probability is time-dependent. One should then give more room to breath at the beginning, and less to breath later on.
Let us say the time period is 50 days. The first 5 days, I would give it 90% to beath (one fifth), then I will give it 80% for days 5 to 9. Etc. I would decrease the breathing space in a law which is function of time (square root of time or log of time, or something like that).