Bear Put Spread

What is a bear put spread?

A bear put spread is a two-leg bearish options strategy that buys a higher-strike put and sells a lower-strike put in the same expiration for a net debit. The debit is the maximum loss, and the short put caps the profit at the strike width minus the debit. Traders also call it a put debit spread or a long put vertical.

The long put provides downside exposure. The short put contributes premium at entry and sets the price below which the expiration payoff stops increasing. Both legs use matching underlying, deliverable, expiration, and quantity.

How to calculate bear put spread profit, loss, and breakeven

The example buys the 100 put for $4.50 and sells the 90 put for $1.80. One standard spread costs $270. The $10 strike width gives it $730 maximum expiration profit and a $270 maximum loss. Breakeven is $100 minus $2.70, or $97.30.

At $102, both puts have zero intrinsic value and the loss is $270. At $95, the spread is worth $500 and profit is $230. At $90 and every lower expiration price, the spread is worth $1,000 and profit is $730.

Below $90, both put values rise as the stock falls. The gain on the long put is offset by the loss on the short position, holding the package at its full strike width.

How to choose bear put spread strikes and entry cost

Set the lower short strike around the downside destination you want to trade. Compare higher long strikes, net debits, and breakevens to build the complete position. Use expected move, gamma exposure, and price levels to compare the target with the market’s current structure.

The example’s short put reduces entry cost from $450 for the 100 put alone to $270 for the spread. It also raises expiration breakeven from $95.50 to $97.30. Compare that funding benefit with the payoff you want below $90. The options profit calculator compares the downside target, entry debit, breakeven, and dollar loss limit, and moves the date to show the position before expiration.

Bear put spread P&L before expiration

Before expiration, current P&L is the spread’s closing value minus its entry debit. Net delta, theta, and vega equal the long put’s Greek minus the short put’s Greek. Recalculate the package at the current price and date to see which leg dominates each exposure.

Bear put spreads in options flow

For an options-flow print, read the contracts, quantities, execution details and opening or closing status together. A higher-strike long put and a lower-strike short put printed together in equal size are one bearish spread with a capped payoff, so reading the long leg alone overstates the bet.

Managing a bear put spread and assignment

Use one spread order with a net debit limit. To exit, sell the long put and buy back the short put together. Assignment of a standard short put buys 100 shares; exercise of the long put sells 100 shares. Plan the resulting stock position before holding the options through expiration.

Risks and limitations of bear put spreads

• Size the spread from the full debit, which is lost if the stock finishes at or above the long strike: $270 in the example at $100 or higher.
• Place the short strike where you expect the decline to end, because expiration profit stops there. Below $90 the spread finishes at its $1,000 width, so a deeper decline adds nothing beyond $730.
• Choose an expiration that gives the decline time to arrive. With the stock near the long strike, time decay works against the spread.
• Plan for early assignment on the short put. The American-style short put can be assigned before expiration, which buys 100 shares per contract while the long put stays open.
• Enter and exit with one net limit order. Two legs pay two bid-ask spreads on entry and exit, and those costs raise the effective debit and move the breakeven lower.

Bottom line

The 100/90 bear put spread risks the $270 debit to make up to $730, and it earns only once XYZ falls through $97.30. Set the short strike at your downside target, and take the trade when the move you expect clears the breakeven with time to spare.