A bull put spread is the natural next step after cash-secured puts. It is still a bet that a stock stays up, and it still pays you a premium up front, but it adds a built-in safety net so your worst case is known and capped from the start.
Think of a guardrail on a winding mountain road. You are driving forward, betting the stock holds up, and the guardrail is there so that if you are wrong, you cannot fall off the cliff. Your loss stops at the rail.
Sell one put, buy a lower one
A bull put spread has two legs. You sell a put at a strike near the stock, which pays you a premium, just like a cash-secured put. Then you buy a put at a lower strike, which costs a little and acts as your guardrail. You keep the difference between the two premiums as your credit, and that lower put caps how much you can ever lose.
A quick example
A stock trades at $50. You sell the $48 put and buy the $45 put, collecting a net $100 credit. If the stock stays above $48, both puts expire worthless and you keep the whole $100. If it falls all the way below $45, your loss is capped: the strikes are $3 apart, so the most you can lose is $300 minus the $100 you collected, or $200. No matter how far the stock crashes, that $200 is the floor.
Why cap the loss at all?
A plain cash-secured put has no floor: if the stock collapses, your loss grows with it. The bull put spread trades away some premium for certainty. You collect a bit less than the naked put would pay, but in exchange you know your exact worst case before you enter, and you tie up far less cash. For many people, that defined risk is worth the smaller reward.
The spread is the cash-secured put with a seatbelt. You give up a little income for a guardrail. If a sudden crash would genuinely hurt you, that trade is almost always worth making.
- A bull put spread sells a put and buys a lower one, keeping the credit and capping the loss.
- You profit if the stock stays above your sell strike, and your worst case is the strike width minus the credit.
- It earns less than a naked put but gives you defined risk and ties up much less cash.
This article is educational and is not investment advice. Options involve risk, including the possible loss of principal. Examples and premiums shown are illustrative and change with the market. Practice with paper trading before committing real money.