"Such synthetic short positions are not quite the same as the real thing. The transaction costs—including the implicit cost of a wide bid/ask spread—are higher for the synthetic short than the actual short. Moreover, the synthetic short ends on a date certain, while the actual short can be held indefinitely."
You can use this to your benefit if you are selling the calls. On the transaction cost side, the prices are coming down and can be had a slow as 9.95 per option trade. Timing can be handled with leaps so if you feel strongly in your position, you have options.
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