Rolling forward, also called rolling out, closes an option position and opens a replacement with a later expiration. A pure roll forward keeps the underlying, option type and strike unchanged. Changing the strike as well combines a roll forward with a roll up or down. For a short option, buy to close the earlier contract and sell to open the later one; for a long option, sell to close and buy to open. The replacement creates new exposure and does not erase the old trade’s profit or loss.
More time is a new exposure
A $100 call bought for $4 now sells for $2. Closing it realizes a $200 loss. Buying a later $100 call for $5 requires an additional $300 on the roll. Across both entries and the old exit, net premium paid is $700, so the sequence needs more than the replacement’s standalone $105 expiration break-even to recover.
At the later expiration, stock at $106 gives the new call $600 value. Its standalone gain is $100, but combined with the old $200 loss the sequence loses $100. Combined break-even is $107 before costs. At $98 the replacement expires worthless and total loss is $700.
The extra time allows more paths to occur; it does not assure that the original thesis will eventually be right. Compare the new option’s IV, event calendar, delta and premium with the planned horizon. For short options, extending the obligation can increase the period of assignment and funding exposure even when the roll collects a credit.
Calendars and diagonal spreads require valuing each leg at its own remaining life. A later long option does not expire alongside a nearer short one, so an expiration diagram that sets both time values to zero on the same date can be misleading.
