May 29, 2026
Options Playbook Team
The bull put spread is one of those strategies that rewards you in two ways at once. You collect premium upfront, and you cap the maximum amount you can lose. That combination makes it one of the more practical plays for traders who are moderately bullish on a stock but don't want unlimited downside exposure sitting on their books.
It goes by a few names. A bull put spread, a short put spread, a credit put spread. The mechanics are the same regardless of what you call it, and understanding how it works is worth the few minutes it takes to get it right before you place the first one.
The setup requires two puts on the same stock, with the same expiration but different strike prices. You sell a put at a higher strike and buy a put at a lower strike. The product you sell generates a credit. The put you buy costs less because it's further out of the money, so you keep the difference as your net credit.
Here's a concrete example. A stock is trading at $52. You sell a $50 put for $1.50 and buy a $45 put for $0.50. Your net credit is $1.00, or $100 per spread. That's yours immediately and represents the maximum profit on the trade.
The bought put at $45 is what converts a naked short put into a bull put spread. Without it, a short put at $50 carries substantial downside risk if the stock falls sharply. With the $45 put in place, your maximum loss is capped at the difference between the two strikes minus the credit received. In this example: $5.00 minus $1.00, or $4.00 per share, $400 per spread.
That defined risk is the reason traders use the bull put spread rather than simply selling a naked put. You give up some premium to buy the lower put, but you trade unlimited risk for a known, fixed worst case.
Once the trade is on, there are three ways it can resolve. Knowing each one before you enter is part of running this play correctly.
This is the outcome you're looking for. Both puts expire worthless. You keep the entire net credit, no action required, and when options expire worthless, there is no need to pay a commission to exit the position. The goal is for the stock to stay above $50 at expiration, and if it does, the spread delivers its maximum profit.
If the stock closes between $45 and $50, your short $50 put is in the money, and your long $45 put is not. The short put may be assigned, putting you in a position to buy 100 shares at $50. Meanwhile, the $45 put expires worthless, providing no offset.
This is the zone where you need a plan. Letting the short put get assigned and ending up long stock at a price below your intended price is a position you may not have intended to hold. Closing the spread before expiration when the stock is trading in this range is usually the cleaner move.
If the stock closes below $45, both puts are in the money. The short $50 put is assigned, and the long $45 put is exercised. The net result is your maximum loss, which is capped at the difference between the strikes minus the credit received. Painful, but defined. You know exactly what you're risking before the trade goes on.
One practical application of the bull put spread is as a position adjustment when a short put starts going against you. This is the "lemons into lemonade" move.
Say you've sold a put and the stock has dropped toward your strike faster than you expected. You're not yet at max loss, but the position is under pressure. Rather than closing the entire trade and accepting the current loss, you can buy a lower-strike put to cap your downside and give the trade more room to recover.
Buying that lower put transforms your naked short put into a bull put spread. Your maximum loss is now defined, your margin requirement typically drops, and you've bought yourself time without fully surrendering the position. This only makes sense if you still believe the stock has a reasonable chance of recovering above your short strike. If that conviction is gone, closing the position and moving on is the cleaner decision.
The bull put spread is a credit strategy, so time decay works in your favor. Every day that passes without the stock moving below your short strike, the time value in both options erodes. The option you sold decays faster in dollar terms, which gradually increases the value of the spread.
The ideal setup for a bull put spread is when implied volatility is elevated. Higher implied volatility means fatter premiums on the options you're selling, which translates directly to a larger credit and a better risk-to-reward ratio. When IV is unusually low, the available credit on put spreads shrinks, making the trade less attractive.
A few practical parameters worth keeping in mind:
If the bull put spread moves in your favor and the short put has decayed to around 20% of what you originally collected, closing the position early locks in most of the profit and removes the risk of holding through an unexpected event. Staying in for the final few cents of decay rarely justifies the exposure.
If the trade goes against you and the stock falls below your short strike, the decision becomes more nuanced. The options worth considering are:
The rolling options page covers the mechanics of adjusting spread positions in more detail if you want to understand the roll as a position management tool.
The bull put spread is sometimes compared directly to the cash-secured put, which is a single-leg play. The cash-secured put requires you to hold enough cash to buy the stock if assigned, while the bull put spread defines and limits the maximum loss without requiring full cash backing.
For accounts with limited capital, the bull put spread is often the more practical play. For traders who actually want to own the stock at the short strike and don't mind assignment, the cash-secured put may generate a slightly higher credit. Neither is universally superior. The right choice depends on whether you want defined risk or are comfortable with the assignment outcome.
The bull put spread is listed in the Playbook as a strategy for Seasoned Veterans and higher, which reflects the position management skill required when the trade goes against you. If you're earlier in your options journey, the Rookies Corner is a useful starting point before moving into spread strategies. The bull put spread rewards traders who understand both the mechanics and the adjustments available when the stock doesn't cooperate.
