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I sold too many contracts and now the stock is falling

Selling too many contracts turns a normal drop into a big hit on the whole account. The fix starts with seeing the number clearly, then shrinking the position on purpose, not in a panic. Here's the math, the account-percent rule, and a recovery plan.

Options guide · 9-minute read · Updated 2026-10-27

What's happening in your account right now

You sold several puts on one stock. Each one looked small on its own. Together they used most of your account. Then the stock fell below the strike, and now every contract is losing at once.

Maybe you've already been assigned and own several hundred shares. Maybe expiry is a few days away and you can see it coming. Either way, one stock now decides how your whole account does.

This is a common mistake in options selling, and a fixable one. The premium per contract looks small, so it's easy to add "just one more." Let's look at the real size.

The oversizing, worked out (an illustration, not a trade idea)

You have a $20,000 cash account. A made-up stock, XYZ, trades at $48.

You sell four 30-day $45 puts for $1.00 each. You collect $400. The cash set aside is 4 × $4,500 = $18,000, which is 90% of the account, all on one stock.

Compare that with selling one contract, which uses $4,500, under a quarter of the account.

At $33, four contracts cost about 22% of the account. One contract would have cost about 5.5%. Same stock, same drop, same strike.

The extra $300 of premium from contracts two to four bought $3,300 of extra loss.

What your account looks like now

Say XYZ is at $33 and all four puts were assigned.

You now hold 400 shares of one stock that make up about 85% of your account, and very little cash. That's the real problem to fix: not the loss itself, but the size.

The recovery plan

Go slowly. Nothing here has to happen today if your puts were cash-secured.

Step 1: stop adding. No new puts on XYZ, and no new trades anywhere until this is sorted. Selling more to "make it back" is how one oversized trade becomes two.

Step 2: decide the size you should have had. Say your rule is one stock gets no more than a quarter of the account. A quarter of $15,600 is about $3,900, which is roughly 100 shares at $33. So 100 shares is the "keeper" position. The other 300 are the extra.

Step 3: plan exits for the extra 300. You have three tools:

Many people mix the first two. For example, sell 100 shares now, and sell calls on 200 more at strikes you'd be glad to exit at, such as $36 and $38. Calls below your $44 basis lock in a loss if they're assigned, so only use strikes you'd accept as an exit on purpose. The strike-below-cost trap is about doing that by accident.

Step 4: wheel only the keeper. On the 100 shares you want, sell covered calls at or above $44 when they pay something. That's the wheel strategy at the size it was meant to run.

Step 5: write it all down. Every sale, every call, every result. The journal is what turns this from a bad month into a lesson.

If the business itself has broken, skip the slow plan. Selling the extra shares, or all of them, is a real decision, not a failure.

The account-percent rule

Here's the rule that would have stopped this. Decide it once, then apply it to every trade:

1. Pick a cap per stock, as a share of the account. For example, 25%.
2. Work out the cash for one contract: strike × 100.
3. Contracts allowed = (account × cap) ÷ (strike × 100), rounded down.

For this account: ($20,000 × 25%) ÷ $4,500 = 1.1, so one contract. If that formula gives less than one, the stock is too expensive for the account. Pick a cheaper one, or wait.

Then add a second cap on total cash committed across all positions, so a market drop can't corner you. See one wheel position or several and how many contracts to sell. The options position size calculator does the math for you.

In a margin account, oversizing is even easier, because the broker holds less than the full strike. If that's where you are, read I used margin to sell puts first.

In Canada, the same rule applies in a TFSA or RRSP, where cash-secured puts are allowed only at some brokers. Covered calls are widely allowed; options permissions differ by broker.

Questions