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Cash-secured put mistakes, and the fix for each one

Most cash-secured put losses come from five habits, not from bad luck. Here they are, with one hypothetical trade that makes all five at once, so you can see what each one costs.

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

The five mistakes in one line each

1. Chasing the biggest premium. A fat premium means high Implied volatility. The market expects a big move, and it's paying you for that risk.
2. Selling puts on a meme stock. The premium is huge because the stock can halve in a week.
3. Selling a put with earnings inside the expiry. One report can gap the stock through your strike overnight.
4. Selling a put on a stock you don't want. Assignment then feels like a trap instead of a plan.
5. Sizing by the premium instead of the strike. The risk is the cash set aside, not the premium.

The fix for each is below. First, the trade that makes all five.

One trade, five mistakes (an illustration, not a trade idea)

A made-up stock, XYZ, trades at $30. It's been in the news. Its 30-day puts pay far more than a quiet stock's would. Earnings are in two weeks. You don't really want to own it; you want the premium.

You sell five 30-day puts with a $28 strike for $2.00 each. You collect $1,000. Your broker sets aside $14,000 ($28 × 100 × 5). Your account is $20,000, so this is 70% of it in one name.

Earnings land. XYZ gaps down to $19 and drifts to $18 by expiry.

What it costs at expiry

You now own 500 shares of XYZ at a Cost basis of $26 ($28 minus the $2 premium), trading at $18. Selling covered calls at a strike you'd accept, $26 or higher, pays almost nothing with the stock at $18. Selling a $20 call locks in a loss if it's called away. Every exit is bad because the entry was.

Mistake 1: chasing the premium

A $2.00 premium on a $30 stock is not a gift. It's the price of a 7% cushion on a stock the market thinks can move 20%. Quiet stocks pay less because they move less.

The fix: compare the premium with the stock's recent moves, not with other stocks. If the premium is high because the stock is wild, you're being paid to hold a wild stock. See implied volatility explained.

Mistake 2: meme names

A stock that doubled last month on a story can halve on the next one. Puts on it pay a lot because assignment there is likely, and the shares could keep falling after.

The fix: only sell puts on a business you'd hold through a bad year. If you can't say in one sentence what the company does and why it makes money, skip it.

Mistake 3: earnings inside the expiry

Earnings is the one date on the calendar where a gap through your strike is normal, not rare. The premium is higher before it for exactly that reason.

The fix: check the earnings date before every put. Pick an expiry that ends before it, or wait until after. Rolling through earnings doesn't fix this either.

Mistake 4: a stock you don't want

A cash-secured put is a paid promise to buy. If you'd never buy XYZ at $28 with cash, don't promise to.

The fix: before the put, write the sentence "I'd buy 100 shares of this at $28 today." If it isn't true, the put isn't right. The wheel strategy only works as a loop if every put is on a stock you'd wheel for a year.

Mistake 5: oversizing

Five contracts "to make the premium worth it" turned a $2,800 problem into a $14,000 one. The premium scaled by five. So did the loss.

The fix: size by the cash set aside. Ask how much of the account one name should be if assigned. Many people stop at 10% to 20%. One contract at a time is the habit that keeps mistakes small; see cash-secured puts with a small account.

What to do before the next put

1. Earnings date? Not inside the expiry.
2. Would I buy 100 shares here with cash? Yes, written down.
3. Why is the premium this high? If the answer is "the stock is wild," pass.
4. If assigned, what share of my account is this? Under my limit.
5. If it falls 30% after assignment, what's the loss in dollars? Can I live with that number?

If any answer is no, there's always another put next week. The market doesn't run out of them. And if a put does go wrong, know what not being assigned and rolling down each really do before you need them.

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