Cash-Secured Put
Sell a put and keep enough cash to buy the shares if you are assigned. You are paid a credit while you wait.
Illustrative expiry sketch. Sample price is 50. Points are teaching numbers, not a quote.
Description
Cash-Secured Put starts from a simple idea: Sell a put and keep enough cash to buy the shares if you are assigned. You are paid a credit while you wait. The construction is short one put, cash reserved for the strike.
The sketch on this page uses a sample price of 50 and round teaching premiums, so you can see the shape. A live quote will use different strikes and a different debit or credit, and the picture before expiry is softer than the line at expiry because leftover time still has value.
Read Cash-Secured Put as a finished bet on where price will be when the options expire, not as a forecast of every day in between. Assignment can happen. If the shares fall well below the strike, the cash is used to buy them at a price above the new market.
When it fits
You are willing to own the shares at the strike and want to be paid for that willingness. Traders usually file it under Bullish Outlook, Acquire Stock, Neutral Outlook, Produce Income, Implied Volatility Decrease. That label is a starting filter, not a promise that the trade will work.
It is a poor fit when your forecast needs a payoff this structure cannot deliver. If you need unlimited upside, do not choose a capped spread. If you cannot carry an open-ended loss, do not choose a naked or ratio position that still has an uncovered short option. Match the forecast to the shape on the chart before you match it to the name.
How the legs work
There is no long option. You sold 1 50 put. There is no share leg, so the result comes only from the options.
Every option in the sample shares one expiry, so the line is the profit or loss if you hold to that date and the options are settled for their intrinsic value.
The sample is opened for a credit of 4 points. That credit is yours at the start only if the later outcome does not take it back.
Maximum gain
The profit tops out at 4 pts in this sample. After price reaches the zone where every long option is as valuable as it can be against the shorts, a further move does not add profit.
That cap is the trade you accepted in exchange for a smaller debit or a credit. Cash-Secured Put is the wrong tool if your forecast needs a much larger move than the distance between the strikes.
Maximum loss
The worst expiry result in this sample is -46 pts. Both the long and short options have finished on the wrong side of that number, and the remaining loss is the net debit or the strike gap that the credit did not cover.
A capped loss is still a real loss. It is the amount you should be willing to spend or reserve before you open Cash-Secured Put, not a figure to discover after the move.
Breakeven
In this sample the line crosses zero at 46. The gold dots sit on that zero line. The dashed line is only the sample spot of 50, not a target.
Each breakeven already includes the debit you paid or the credit you received. If you pay more than this sample, the profitable zone shrinks. If you receive a larger credit, the zone widens. Cash-Secured Put should be judged from your fill, not from these round numbers.
Volatility
Before expiry, a fall in implied volatility tends to help Cash-Secured Put, because you sold more premium than you bought. You want the options to cheapen if price stays where you sold them.
A jump in implied volatility does the opposite: it marks the short options against you even when price has not reached the strike. That is a reason to avoid selling premium into an event you know will reprice volatility.
Time decay
You collected premium in Cash-Secured Put. If price stays inside the zone where the short options can expire worthless, that premium is the profit and time is how you earn it.
Time does not protect you from a move through the short strike. Decay is a benefit only while the price forecast remains intact.
Assignment risk
The short leg is 1 50 put. Assignment can happen before expiry once that option is in the money, and it is more likely when it is deep in the money or when a dividend makes early exercise attractive.
If you are assigned, the long option does not automatically cancel the stock the same afternoon. You can wake up long or short shares for a day. Closing Cash-Secured Put before expiry, instead of hoping both legs expire together, removes that weekend guess.
What to watch
Assignment can happen. If the shares fall well below the strike, the cash is used to buy them at a price above the new market.
The sample breakeven sits at 46. Into the last day, decide whether you will close or hold. A short option that finishes near its strike can be assigned or not, and you may not know which until the next session. Cash-Secured Put is easier to manage when that decision is made while the market is still open.
Example
- Short 1 50 put
- Sample net credit: 4 points
- Max gain
- 4 pts
- Max loss
- -46 pts
- Breakeven
- 46