Rolling an option

Rolling an option means closing out an existing option position and simultaneously opening a new option position on the same underlying stock, typically with a different strike price, a later expiration date, or both. Instead of simply letting a position expire or closing it outright, the trader replaces it with a new contract that continues a similar strategy further out in time.

Traders roll options for several reasons. An option seller nearing expiration might roll a covered call to a later date to keep collecting premium if the stock has not moved as expected, or roll a short put down and out to give a losing position more time and room to work while collecting additional premium in the process. An option buyer with a position that has moved favorably might roll up to a higher strike to lock in some gains while staying exposed to further upside, using proceeds from closing the original option to help pay for the new one.

Rolling is not free, it involves paying transaction costs on both the closing and opening trades, and depending on market pricing it can be done for a net credit, collecting more premium than was paid out, or a net debit, paying more than was received. The decision to roll rather than simply close a position usually comes down to whether the trader's original thesis on the stock still holds and whether the new strike and expiration offer a reasonable balance of additional premium against the additional risk of staying in the trade longer.