Bear Put Spread: How It Works, With a Worked Example

What a bear put spread is

The Options Industry Council (OIC) describes a bear put spread as buying one put and selling another put with the same expiration and a lower strike. The sold put pays for part of the one you bought, so the position needs a net debit. It is a type of vertical spread.

Think of it as two jobs split between two options:

• The long put (higher strike) is the engine. It gains value as the stock falls.
• The short put (lower strike) is the financing. Its premium cuts your cost, but it caps your profit once the stock is below its strike.

If puts are still new to you, start with put options: buying and selling mechanics. A bear put spread is two of those trades combined, and the lesson on vertical spreads covers the whole family. The glossary defines a debit spread.

When it makes sense

The OIC lists the goal as profiting from a near-term decline in the stock, with a steady or falling price over the life of the options as the ideal outlook. In plain terms, you expect the stock to fall, ideally toward a level you can name, and you would rather risk a known amount than pay for a plain put or short the shares.

• A stock has broken a support level and you expect a measured pullback toward the next one.
• A plain long put looks too expensive for your view.
• You want your risk fixed in advance. Short shares have no ceiling on losses; this spread's worst case is the debit.

The trade-off is the whole design: lower cost and defined risk in return for a cap on the reward.

The math: max loss, max profit and breakeven

One contract covers 100 shares, so multiply the per-share figures by 100 to get dollars. The OIC gives the same maximum profit and breakeven formulas.

A worked example

These numbers are a made-up illustration, not a live quote. Say a stock trades at $100 and you expect it to slide toward $95 over the next five weeks.

• Buy the 100 put for $4.10.
• Sell the 95 put for $2.00.
• Net debit: $4.10 minus $2.00 = $2.10 per share, or $210 per contract.

From that:

• Maximum loss: $210, if the stock closes at or above $100 and both puts expire worthless.
• Maximum profit: ($100 minus $95) minus $2.10 = $2.90, or $290, if the stock closes at or below $95.
• Breakeven: $100 minus $2.10 = $97.90.
• Reward to risk: $290 to $210, about 1.4 to 1.

Look at the last two rows of the table, and at where the line goes flat. Below $95, every extra dollar the long put gains is cancelled by a dollar the short put loses, so a stock that falls to $70 pays the same as one that falls to $95. That is the cap you accepted when you sold the lower put.

Before you enter, compare the debit with the width. Here the debit is $2.10 on a $5 wide spread, which is 42 percent of the width. If a spread costs most of its width, the room left for profit is small next to the risk.

Type your own strikes and premiums into the free options profit calculator to see the breakeven and the maximum profit and loss of a bear put spread at expiration.

Choosing strikes and expiration

• Long strike. Near the current price (at the money or slightly in the money) if you want the spread to respond quickly to a drop. Further out of the money costs less but needs a bigger fall before it earns anything.
• Short strike. Set it where you realistically expect the stock to land, such as a support level. Closer to the long strike lowers both your cost and your maximum profit; further away raises both.
• Expiration. Give the idea enough time. If your reason is a technical breakdown or an earnings reaction over a few weeks, pick an expiration that covers it with room to spare. Shorter-dated spreads are cheaper but leave less margin for being early.

Compare strikes on a real chain. Our lesson on reading an option chain shows how to read the bid, ask, volume and open interest so you price both legs sensibly.

Time, volatility and assignment

• Time decay. The OIC says the passage of time hurts the position, though not quite as much as it hurts a plain long put, because the short put decays in your favor.
• Implied volatility. The effect is slight, all else equal, because the two puts largely offset each other. A big move in the stock can change that, so one put may be affected more than the other. Around earnings, see our lesson on volatility crush and earnings strategies.
• Early assignment. The short put can be assigned before expiration. The OIC says this generally happens only when the put is deep in the money. If it does, you buy shares at the lower strike, and using your long put to cover that means financing a long stock position for one business day. Our lesson on assignment, exercise and expiration walks through it.

The expiration weekend is the other trap. The OIC notes that when the stock is near the short strike, you may not know until the following Monday whether the short put was assigned, and guessing wrong can leave you holding an unintended stock position. Its suggestion is to close the spread early or be ready for either outcome, and to watch the stock closely on the last trading day.

Entering and exiting the trade

1. Enter it as one spread order with a net debit limit, not as two separate legs. Two orders can leave you filled on only one leg.
2. Start near the midpoint of the combined bid and ask, and move toward the ask only if you must. Wide quotes cost real money; see our lesson on order types and getting filled.
3. Write your exits before you enter: a profit target (a share of the maximum profit) and a loss limit (a share of the debit).
4. Close the whole spread as one order when a target or limit is hit. You rarely need to hold to expiration to collect most of the value.

Keep the plan in a trade journal so you can review whether you followed it, not just whether the trade made money.

Debit spread or credit spread?

The phrase "bear put credit spread" confuses many people. The bear put spread is a debit spread: you buy the more expensive put and sell the cheaper one, so you pay money up front. Selling the higher-strike put and buying the lower-strike put creates a credit, but that is a bullish position, a bull put spread. A bearish credit spread is built with calls instead, as a bear call spread. The glossary defines a credit spread.

Common mistakes

• Picking a width that is too narrow or too expensive. Check that the debit leaves real room for profit.
• Ignoring liquidity. Thinly traded strikes are hard to enter and harder to exit.
• Forgetting the cap. If you think the stock could fall hard, the spread leaves that gain on the table.
• Having no plan for assignment or the expiration weekend.
• Sizing too large. The defined loss is the full debit, so size the trade so that losing all of it is survivable.
• Holding for the last dollar. Closing early often removes risk for little cost.

Questions people ask

Sources

• Options Industry Council: Bear Put Spread