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What option sellers do under stress, and what it costs

The expensive mistakes rarely happen on the day you open a trade. They happen on the day it goes wrong, when the plan feels optional. Here are the three big ones, and a worked example of what they cost.

Options guide · 8-minute read · Updated 2026-10-26

The three stress mistakes

The revenge roll. The put is in the money, assignment is coming, and rolling it out for a credit feels like dodging a loss. It isn't. A roll closes a losing trade and opens a new one that carries the same loss plus a longer wait. Done once for a reason, fine. Done because you can't stand to see red, it's a revenge trade with a nicer name.

Doubling down. The stock dropped, so the puts look cheap "down here." Selling more to average in feels like discipline. It's the opposite: it doubles the position on the exact stock that just proved it can fall, at the moment you're least able to judge it.

Abandoning the plan. Every sane plan has a line: where you'd sell the shares, how much you'd risk, when you'd stop. Under stress that line becomes "just this once." The plan was written by the calm version of you. Trust that version.

All three have the same root. A loss feels like a mistake that must be undone now, so the next trade gets picked for how it makes you feel rather than what it risks.

A worked example, where stress takes over (an illustration, not a trade idea)

A made-up stock, XYZ, at $50. You sell one 30-day $45 put for $1.00. Your written plan says: if assigned and the stock keeps falling, sell the shares at $40 and take the loss.

XYZ drops to $40 and you're assigned 100 shares at $45. By your plan, you'd sell at $40: −$500 on the shares, +$100 premium, −$400 and done.

That's not what happened. Here's the stressed version:

Final tally:

The plan's loss was $400. The stress version lost $1,420, more than three times as much, with three times the cash tied up, on a stock that went from "I'd own it at $45" to "please let me out at $35."

And look at step 5. The stock recovered to $38. With no call sold, 300 shares at $38 would have cut the loss to about $700. The below-cost call sold the recovery, which is the same mistake under a different kind of stress.

Why it happens

• Loss aversion. A paper loss feels like a wound, and anything that stops the bleeding today looks good, even if it costs more tomorrow.
• The premium is addictive. Selling another option puts money in the account. It's the one action that feels productive, so it's the one you take.
• Sunk cost. "I've already got 100 shares, I may as well get 200 at a better price." The first 100 are a fact, not a reason.
• Nobody is watching. No one makes you follow the plan. The journal is the only witness.

The wheel strategy makes this worse, not better, because it always offers a next move. There's always a call to sell, a put to roll. The plan is what says no.

The circuit breakers that work

1. Write the exit before the entry. "If assigned and XYZ closes below $40, I sell the shares within a week." A pre-set line removes the decision from the bad day.
2. No new contracts on a stock that just assigned you. Full stop, for 30 days. If it's still a good idea in a month, it'll still be there.
3. Never sell a call below cost basis without writing why. If the only reason is "to make some back," don't.
4. Cap the position before the trade. One contract per stock, one stock per X dollars of account. The cap stops doubling down because the cap says you're already full.
5. A pause rule for the account. After two losing positions in a row, or a set drawdown, stop selling anything for a month. When to stop selling options for a while gives a way to set it.
6. Roll only with a written reason, and only once. Rolling mistakes lists the reasons that don't count.

What to do if you're in it now

If you're reading this with 300 shares at a loss and a below-cost call open, the order is: stop adding, write down the real cost basis, mark it to market, and read recovering from a big loss on assigned shares. The way out is slow or it's a sale. There isn't a fast one.

A Canadian note: stress trades inside a TFSA have one extra cost, because a loss there can't be claimed against anything, and a doubled-down position needs the full cash in the account since there's no margin.

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