See transactions, a 25% of premium would results in closing the transaction most of the time within a hour. Profits would then be small and losses could be big because of opening gaps
Let’s say SPY etf is currently trading at $100. The 30 day put cost $10 and the 30 day call cost $10. So the straddle would cost $20(i.e 10+10). The width of the straddle is 20 and so our target for exit and retry is $5(i.e 25% of 20) either up or down. So we sell 100 call and 100 put. However if SPY price moves to $105, we buy to close the 100 call/100 put straddle and sell to open the 105 call/105 put straddle. If instead SPY fell to $95, then we would still buy to close the 100 call/100 put straddle and then sell to open the 95 call/ 95 put straddle. We would keep closing and re-entering the straddle after every $5 up or down movement in SPY price. So there would always be a re-entry at 105, 110, 115, 120, 125 ……. and at 95, 90 85, 80, 75…… and so on. We can also add exit conditions maybe when 25% of the Max Profit of the first straddle is reached. So in our example: Our first short straddle was 100 call/100 put. Assuming the maximum profit potential for that straddle was $1000, then no matter how many times we roll up and down the straddle, once we reach $250 in profit we close the trade. Same can be done for loss. If the loss is $2000(200% of potential max profit), then we would stop the entire reentry process and close all open trades. I hope my explanation is clear. Thanks.
I understand the calculation, but the premium is much lower then 20% of SPY on 100$. See picture for premium and strike for spot at that moment. Most of the time it is less then 2%. You will then close the trade when the index changes 0.5%. This will result in small wins..