Put Ratio Spread - How the 1x2 Works and Where It Loses
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Calculate the net cost, maximum profit, two break-even prices and worst-case loss of a 1x2 put ratio spread.
A put ratio spread buys one put and sells two (or more) puts at a lower strike in the same expiration, so the trader is short more puts than they own. It profits most from a modest decline to the short strike. Below its lower break-even the loss grows $100 per dollar per 1x2 spread, and it stops growing only when the stock reaches zero.
At expiration, a 1x2 put ratio spread makes its maximum profit, the strike width minus the net debit, with the stock exactly at the short strike. Above the long strike it loses only the net debit (or keeps a credit). Its worst case, with the stock at zero, is the lower break-even times 100.
This lesson mirrors the call ratio spread on the downside. The Options Industry Council lists it as a short ratio put spread and describes its maximum loss as "substantial".
A put ratio spread has large, uncovered risk. Its loss has a floor, unlike a call ratio spread's, but the extra short put is uncovered, and on its own it can lose its strike x 100 minus its premium: $4,500 - $37 = $4,463 for one naked XYZ 45 put. In this lesson's spread the worst case is $4,122 if XYZ goes to zero, about 34 times the $122 cost, and a crash or a gap lower can get there past any stop. Brokers usually treat the extra put as uncovered put writing, which needs a high approval level and margin.
How does a put ratio spread work?
Start from a bear put spread: buy a put, sell a lower-strike put against it. A put ratio spread sells one more put at the lower strike. The extra premium cuts the cost and raises the best case, and in exchange the trader takes on the obligation to buy 100 more shares at the short strike if the stock falls below it.
That obligation is what a short put is. The put options lesson covers the long side; the extra short put is the other side of that trade, with no long put beneath it to cap the loss.
Worked example
Put ratio spread example: XYZ 50/45, 1x2
XYZ trades at $50. With 45 days to expiration, you buy one XYZ 50 put for $1.96 and sell two XYZ 45 puts for $0.37 each. These are model prices at 30% implied volatility, the free calculator's default.
- Net cost: $1.96 - (2 x $0.37) = $1.22 per share, a $122 debit.
- Maximum profit: ($50 - $45) - $1.22 = $3.78 per share, $378, with XYZ at exactly $45.
- Upper break-even: $50 - $1.22 = $48.78.
- Lower break-even: $45 - $3.78 = $41.22.
- Maximum loss: $122 if XYZ is at or above $50, and $4,122 if XYZ falls to zero.
The leg columns show what each leg is worth at expiration; the profit or loss column also nets out the $122 paid to open.
Illustrative and hypothetical. The ticker and prices are invented for teaching, and the figures exclude commissions, fees, margin interest and taxes, which reduce real results. Past or hypothetical outcomes do not indicate future results.
XYZ 50/45 put ratio spread (1x2) at expiration
Hover or tap the chart, or focus it and use the arrow keys, to read any price.
Open this trade in the free calculatorShow as table
What are a put ratio spread's max profit, max loss and break-evens?
For a 1x2 put ratio spread opened for a net debit:
- Maximum profit = (long strike - short strike) - net debit, reached with the stock at the short strike at expiration.
- Upper break-even = long strike - net debit. If the spread opened for a credit, there is no upper break-even: the credit is kept above the long strike.
- Lower break-even = short strike - maximum profit.
- Maximum loss = lower break-even x 100 per 1x2 spread, if the stock goes to zero, and the net debit above the long strike.
The loss stops only when the stock reaches zero, and that worst case is far from the premium involved. Here, a trade that cost $122 can lose $4,122, almost 34 times its cost.
How the put ratio spread's loss grows in a crash
Loss at expiration, by XYZ price
Why do traders use a put ratio spread?
The view is a modest, orderly decline to about the short strike. Some traders also use a put ratio spread against a stock they would be willing to own at the short strike, treating possible assignment of the extra put as a planned purchase, much like a cash-secured put.
Before expiration, the example's net Greeks in the calculator's model are about -19 delta, +$0.34 of theta per day and -$0.64 of vega per volatility point. Time passing helps it at entry, though if XYZ is still at $50 at expiration the whole $122 debit is lost; rising implied volatility hurts it.
That vega matters more for puts than the number suggests. When a stock sells off sharply, implied volatility usually jumps, and real markets often price lower-strike puts at higher implied volatility than at-the-money ones (volatility skew, covered in Course 3's Implied Volatility Deep Dive module). Both effects push up the value of the two short puts just as the stock is falling toward them.
When does a put ratio spread go wrong?
- A crash or gap lower. An earnings miss or market shock can open the stock below the lower break-even, past any stop.
- Assignment on two puts. If both short puts are assigned, you buy 200 shares at $45 while the long 50 put covers only 100 of them. Hold enough cash or margin for the extra shares.
- Rising volatility before expiration. The position can show a loss while XYZ is still well above $45.
A common plan is to close the trade, or buy back the extra short put, if the stock falls through the short strike quickly instead of drifting toward it.
Check your understanding
You buy one 60 put for $2.50 and sell two 55 puts for $1.00 each. What is the net cost and the maximum profit?
Show answer
The net cost is $2.50 - $2.00 = $0.50 per share, a $50 debit. The maximum profit is ($60 - $55) - $0.50 = $4.50 per share, or $450, with the stock at $55 at expiration.
Using the same spread, where is the lower break-even, and what is the loss if the stock goes to zero?
Show answer
The lower break-even is $55 - $4.50 = $50.50. If the stock goes to zero, the loss is $50.50 x 100 = $5,050.
Why does a put ratio spread's loss have a floor while a call ratio spread's does not?
Show answer
A stock cannot fall below zero, so the naked put alone can lose at most its strike x 100 minus its premium, and the whole spread's worst case is the lower break-even x 100. A stock has no upper limit, so an uncovered call's loss has no ceiling. Both extra short options are uncovered, but only the call's risk is undefined; the put's is large but limited.
Key takeaways
- A put ratio spread buys one put and sells two lower-strike puts in the same expiration: a bear put spread plus one naked put.
- Its maximum profit is the strike width minus the net debit, at the short strike at expiration.
- Its lower break-even is the short strike minus the maximum profit, and below it the loss grows $100 per dollar per 1x2 spread.
- The worst case is the lower break-even times 100, reached only if the stock goes to zero, and often many times the trade's cost.
Common questions
What is a put ratio spread?
It is one long put plus two short puts at a lower strike, all in the same expiration. It profits most if the stock falls to the short strike and stops there. One of the short puts is uncovered, so a crash below the lower break-even produces a large loss.
What is the max loss on a put ratio spread?
On the downside, the lower break-even times 100 per 1x2 spread, reached if the stock goes to zero. In this lesson's XYZ example that is $4,122. Above the long strike the loss is only the net debit; if it opened for a credit, there is no loss there and the credit is kept.
Is a put ratio spread bullish or bearish?
Mildly bearish. It wants a modest decline to the short strike. A small drop helps, a sharp sell-off hurts, and a rally loses only the net debit or keeps the credit.
Is a put ratio spread safer than a call ratio spread?
Its loss has a floor, because a stock cannot fall below zero, while a call ratio spread's does not. Its risk is not undefined, but it is large and uncovered: the extra short put has no long put behind it, so the spread can lose many times what it cost: $4,122 on a $122 trade in this lesson. Sell-offs are also often sharper than rallies.