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The stock gapped down overnight on my short put

You sold a put, news hit after the close, and the pre-market shows the stock far below your strike. There is nothing to do before the bell. Here's what the open will look like, and what to do from there.

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

What is actually happening in your account

Right now your account looks the same as it did at 4 pm. The option line still shows yesterday's price. That is because stock options for most retail accounts do not trade before the open. The stock's pre-market price is moving; your put isn't, yet.

When the bell rings, the put will reprice in one step. If the stock opens $9 under your strike, the put will be worth about $9 plus whatever extra the nervous market adds. The whole move lands at once.

You cannot close before that. You cannot roll before that. The Gap is the one risk in the wheel strategy that no amount of watching can act on, which is why the fix for it lives in the size of the trade, not in the reaction.

The numbers (an illustration, not a trade idea)

XYZ closed at $50. You sold a 30-day put with a $45 strike for $1.00 and collected $100. After the close the company cut its forecast. Pre-market shows $36.

At the open, the $45 put trades at about $9.50: $9 of real value and a little extra because volatility just jumped.

The first two rows are nearly the same number. Once the put is deep in the money, closing and being assigned cost about the same. The difference is what you own afterward: nothing, or 100 shares of a company that just cut its forecast.

Before the open: the only three things worth doing

• Read the news, not the price. Is this a one-time charge, a bad quarter, or a change to the business? That decides whether you would own it at $36.
• Decide your plan for each open. "If it opens above $40 I hold; below $40 I close in the first hour with a limit order." Write it down. Decide now, calmly, not at 9:31.
• Check your size. How much of the account is this one trade? That number tells you whether today is a bad day or a bad year.

Do not place a market order to close the put at the open. The first prints after a gap are wide and ugly, and the spread on the option can be a dollar or more. See the stock got halted if trading is paused, which sometimes happens on news like this.

Why sizing was the fix

The same −$850 means very different things in different accounts.

Same stock, same gap, same put. The third account didn't make a worse trade. It made the same trade too big, so one piece of news it could never have predicted became most of its year.

Gaps happen. Forecast cuts, drug trial results, lawsuits, a bad quarter, a fraud report. None of them show up on a chart the day before. The only thing you control is how much of the account stands in front of any one of them. Our guide on position sizing for selling options gives a simple cap.

After the open: the decision

Once the put reprices, ask the one question: would you buy 100 shares at $45 today, knowing what you now know?

If the news changed the company, no. Close the put in the first hour with a limit order a little inside the spread. Take the −$850 and write down why. You are paying to not own a company you no longer trust.

If the news was a one-time hit and you would still own the company here, hold and let assignment happen. Your cost is $44. Set the give-up price, below which you sell the shares. Read assigned and the stock kept falling for the choices after that.

Either way, do not sell another put on the dip "to average down." That is a second trade on a stock that just showed you how it behaves.

The rule for next time

Three lines for the checklist:

1. No single put's strike value is more than a set share of the account. Some sellers use a cap like 20% to 25%; pick yours and write it down.
2. No put crosses an earnings date unless that is the plan. See earnings inside my option expiry.
3. Every put is on a stock you would buy at the strike after bad news, because bad news is when the put gets assigned.

The trade that gapped was not reckless. The plan around it was just missing the size rule, and the gap found the hole.

Questions