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Put Ladder: Moderate-Decline Profit and Severe Downside Risk

For educational purposes only; not investment advice.

Direct answer

Section titled “Direct answer”

In this article, a put ladder means three puts with one expiration and descending strikes: buy one put at K₁, sell one at K₂, and sell one at K₃, where K₁ > K₂ > K₃. It is a bear put spread plus an additional lower-strike short put.

The extra short put can reduce the entry cost, but it removes the bear spread’s defined downside risk. The position can profit from a moderate decline into the middle strike region, then loses value dollar for dollar below the lowest strike. For an equity whose price cannot fall below zero, the loss is large but bounded by zero; it is not unlimited.

“Put ladder” is not a perfectly standardized name. Some platforms reverse the legs or use four legs. Analyze the signed quantity, strike, expiration, settlement, and net premium of every leg rather than relying on the label.

Piecewise expiration payoff

Section titled “Piecewise expiration payoff”

For one long K₁ put, one short K₂ put, one short K₃ put, and net debit D, expiration profit per share is:

Π(S_T) = max(K₁−S_T,0) − max(K₂−S_T,0) − max(K₃−S_T,0) − D

  • S_T ≥ K₁: all puts expire worthless; loss equals D.
  • K₂ ≤ S_T < K₁: profit rises as the underlying falls; upper breakeven is K₁ − D.
  • K₃ ≤ S_T < K₂: the first vertical is fully valuable and the lowest put remains out of the money; profit is K₁ − K₂ − D.
  • S_T < K₃: profit is K₁ − K₂ − K₃ + S_T − D, so it falls one dollar for every further dollar of decline. The lower breakeven is K₂ + K₃ − K₁ + D.

These breakevens assume a debit D and that they fall in the stated regions. For a net credit, use a negative D. Before expiration, volatility, skew, time, interest rates, dividends, and executable quotes can make mark-to-market results differ sharply from this expiration diagram.

A 100/95/90 put ladder

Section titled “A 100/95/90 put ladder”

Assume the stock is near 100. Buy one 100 put, sell one 95 put, sell one 90 put, and pay a 1.00 net debit. With the standard 100-share multiplier, expiration results before fees are:

Stock at expiration Option payoff per share Profit/loss per share Position profit/loss
110 or 100 0 −1 −$100
99 1 0 $0
95 5 4 +$400
90 5 4 +$400
86 1 0 $0
80 −5 −6 −$600
0 −85 −86 −$8,600

The upper and lower breakevens are 99 and 86. Maximum expiration profit is 4.00 per share, or $400, throughout the 90 to 95 plateau. Maximum loss occurs if the stock reaches zero: 86.00 per share, or $8,600. The attractive $100 entry debit therefore does not describe the position’s economic risk.

Risk and implementation checklist

Section titled “Risk and implementation checklist”
  • Verify all three leg signs, one shared expiration, the contract multiplier, and whether the trade is a debit or credit.
  • Stress test zero and prices well below K₃; the long put spread is capped at K₁ − K₂, while the extra short put keeps losing.
  • Reserve cash and buying power for assignment of either short put. Broker margin is a collateral rule, not the maximum possible loss.
  • American-style equity puts may be assigned before expiration. Assignment can create stock and leave a different residual option position.
  • Plan for expiration and pin risk around both short strikes, including exercise decisions made after the regular close.
  • Use a multi-leg limit order. Separate fills can temporarily create an uncovered short put, and quoted midpoints may not be executable.
  • Include commissions, fees, wide spreads, volatility skew, and changing margin in any pre-expiration exit plan.
  • Buying another still-lower-strike put can cap the downside, but it creates a different four-leg structure with different cost and breakevens.

Common misconceptions

Section titled “Common misconceptions”
  • “A put ladder is always the same trade.” The label varies; the legs define the exposure.
  • “It contains a bear put spread, so risk is limited.” The additional short put reopens downside risk.
  • “A credit entry makes the trade safe.” A small credit can coexist with a very large loss near zero.
  • “Maximum profit occurs only at one price.” In this 1:1:1 structure it spans the interval from K₃ through K₂.
  • “The higher long put covers both short puts.” One long put cannot fully offset two short puts below all strikes.
  • “The expiration graph predicts today’s P/L.” Interim value also depends on volatility, time, rates, dividends, and liquidity.
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Authoritative sources

Section titled “Authoritative sources”