This is the trade the whole course builds toward. A Cash-Secured Put is four simple decisions. Make them in order and the rest takes care of itself. You can run the numbers alongside this lesson in the Cash-Secured Put Calculator.
Want to go deeper? The dedicated Cash-Secured Puts course takes this strategy from mechanics to managing a live position across six focused lessons.
Step 1 — Pick a stock you’d genuinely own
Start with the company, not the premium. Choose a stable business or broad ETF you’d be happy to hold for years. The test: if you woke up owning 100 shares at your strike, would you be content? If not, wrong stock.
Step 2 — Pick a strike below today’s price
The strike is the price you’re willing to buy at. Setting it below the current price means you’re asking for a discount before you’ll buy. To gauge the odds, Sellers lean on delta — a number your broker shows for every option that, for a Put, conveniently doubles as a rough chance of being assigned. A strike around 0.20–0.30 delta means loosely a 20–30% chance of assignment; about 30–45 days to expiry is the usual sweet spot — enough premium to be worth it, without tying your cash up for months. How to choose a strike price goes deeper.
Step 3 — Set aside the cash
Reserve strike × 100 in cash per contract. That reservation is what makes the Put "secured" rather than naked. A $50 strike ties up $5,000. If your broker would let you sell it on margin without the cash, don’t — that’s a different, riskier trade we don’t do here.
Step 4 — Know the three outcomes
- Stock stays above the strike: the Put expires worthless, you keep the entire premium, and you repeat.
- Stock sits right at the strike: pin risk — you might or might not be assigned. Usually a non-event for a stock you’d own.
- Stock falls below the strike: you’re assigned and buy 100 shares at the strike, using the cash you reserved. Your effective cost is the strike minus the premium.
A worked example
You’d happily own XYZ, trading at $52. You sell one 30-day $50 Put for $1.20. You reserve $5,000. If XYZ stays above $50, you keep $120 — about 2.4% on the cash in a month. If XYZ drops to $46, you buy 100 shares at $50, but your real cost is $48.80 ($50 − $1.20) — better than buying at $52 today, on a stock you wanted anyway.
The clearest way to see it: a paid limit order
| Limit order to buy | Cash-Secured Put | |
|---|---|---|
| Goal | Buy the stock at a lower price | Get paid while waiting to buy lower |
| If the stock never dips | Nothing happens | You keep the premium |
| If it reaches your price | You buy the shares | You’re assigned the shares |
| Income along the way | None | The premium, upfront |
| Best used when | You have a target buy price | You’re happy to own it and understand assignment |
Common beginner mistake
Selling the Put without actually reserving the cash. That turns a defined, secured trade into a Naked Put — the same position with margin and a much uglier worst case. The cash sitting idle is the strategy.
Key takeaways
- A CSP is four steps: own-worthy stock → strike below price → reserve strike × 100 in cash → manage the three outcomes.
- Assignment isn’t failure: your effective cost is the strike minus the premium you collected.
- Think of it as a limit order to buy a stock you want — that pays you while you wait.