August 30, 2026
Selling a put and buying a cheaper one below it converts an open-ended obligation into a known maximum loss. The conversion is genuinely useful and it isn't cheap, and the price is paid in a currency that's easy to overlook.
Sell one put, and at the same time buy another put at a lower strike with the same expiration. You collect more for the one you sold than you pay for the one you bought, so the position opens for a net credit.
Stock at $52. Sell the $47 put for $1.00, buy the $44 put for $0.45. Net credit $0.55, or $55.
Maximum profit: the $55, if both expire worthless. Maximum loss: the $3 width between strikes, times 100, minus the credit — $245. Breakeven is $46.45.
Below $44 the two legs move together and the loss stops growing. That floor is the entire product.
Compare it to selling the $47 put alone. That collects $100 instead of $55, and its loss below $44 keeps going all the way to zero — a theoretical $4,700.
So the $45 you gave up bought a hard stop at $245. In the tail, that's an extremely good trade. In the ordinary case where the stock finishes above $47, you simply collected 45% less for the same outcome.
That's the shape of it: you pay in every ordinary month for protection that matters in rare ones. Whether it's worth it depends entirely on how the rare ones are distributed, which is exactly the thing nobody knows in advance.
The stronger case for spreads isn't the loss cap, it's the collateral. A cash-secured $47 put ties up $4,700. The spread ties up $245. Same underlying view, one-twentieth the capital.
Return on capital committed looks transformed: $55 on $245 is 22%, against $100 on $4,700 which is 2%. This comparison appears constantly and it is doing something slightly dishonest — the two positions have different risk of ruin, and the freed-up $4,455 has to actually be doing something for the comparison to mean anything.
Where it's genuinely decisive is in a small account. Selling cash-secured puts on anything above about $50 a share requires capital that many accounts don't have. Spreads make the strategy available at all, and that's a real argument rather than a rhetorical one.
Defined risk invites size, and this is where spreads actually hurt people.
A $245 maximum loss sounds small, so selling ten of them sounds reasonable. That's a $2,450 maximum loss for $550 of credit, and in a sharp broad selloff the spreads don't fail independently — they're all short the same market. The defined risk is defined per contract and the correlation is not.
The clean check is the one from the sizing piece: multiply the maximum loss by the number of contracts, assume they all lose at once, and look at that number against the account. If it's uncomfortable, the defined risk didn't help, it just made the discomfort easier to arrive at.
The short leg is still an American-style option that can be assigned early. If it is, you receive 100 shares and you still hold the long put, which is not shares — it's a separate instrument that has to be dealt with separately.
You now have an unplanned stock position requiring the full purchase price, plus a long put you can exercise or sell. It resolves, but it resolves through actions on Monday morning, and if the account can't carry the shares in the interim the broker will resolve it for you.
The related detail: if the stock finishes between the strikes at expiration, the short leg is assigned and the long one expires worthless. That's the maximum-loss case arriving as a stock purchase rather than a cash debit, and it needs funding on the day.
A cash-secured put has a fallback: assignment means owning a stock you said you wanted, at a price you chose. Time can repair it.
A credit spread has no fallback. At maximum loss the position simply closes at the loss. There is no owning anything and waiting. That's the honest cost of the loss cap, and it's why spreads suit a view on a stock's range while cash-secured puts suit a willingness to own the company.