# Forward-Start Options: Pay Now, Set the Strike Later

Understand the three-date structure, percentage strike, payoff, forward-volatility exposure, valuation assumptions, and contract risks of a forward-start option.

Canonical: https://wiki.fcontext.com/options/forward-start-options/
Fact checked: 2026-07-22

> For educational purposes only; not investment advice.

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## Direct answer

A **forward-start option** is agreed and priced today, but its option period begins on a future date and its strike is set then—commonly as a percentage of the underlying price. Let `t0` be trade date, `T1` the strike-setting date, and `T2` expiration. For a European Call with percentage strike `α`, the strike is `K = αS(T1)` and expiration payoff is `max[S(T2) − αS(T1), 0]`.

The contract therefore buys exposure to the return from `T1` to `T2`, not a fixed strike known at `t0`. It appears in structured products, compensation analysis, and reset or cliquet designs. It is commonly customized or embedded rather than a standard retail option-chain contract; the actual confirmation controls dates, averaging, dividends, adjustments, settlement, and counterparty or clearing terms.

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## Three dates and forward volatility

At `t0`, the parties fix the premium and rules but not the dollar strike. At `T1`, the reference price is observed under the contract's method and the strike becomes known. Between `T1` and `T2`, the activated option behaves according to its terms; at `T2`, it settles.

When `α = 1`, it starts at the money regardless of the level reached by `T1`. Under simplified scale-invariant models, value can be expressed as current spot times the value of an option on the future return interval. In practice, valuation depends on **forward volatility** between `T1` and `T2`, skew and term-structure dynamics, jumps, rates, dividends, and the rule used to set `S(T1)`. Today's vanilla surface constrains—but does not uniquely determine—the future surface, creating material model risk.

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## A one-year-delayed, two-year Call

Assume one contract is purchased today with `T1` in one year, `T2` two years after `T1`, `α = 1.05`, multiplier `100`, and a premium of `$7.50` per share. Initial cash cost is `$7.50 × 100 = $750`.

If the stock is `$80` at `T1`, the strike becomes `1.05 × $80 = $84`. If it is `$110` at `T2`, payoff is `max($110 − $84, 0) × 100 = $2,600`; net expiration result before fees, financing, and tax is `$2,600 − $750 = $1,850`. If the stock is `$82` at `T2`, payoff is zero and the premium is lost.

The stock may be far above today's price at both future dates yet the Call can expire worthless: what matters is the return after strike setting. Likewise, a low `S(T1)` does not create a free bargain because the strike resets in proportion.

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## Contract and valuation checklist

- Identify `t0`, observation date `T1`, expiration `T2`, `α`, Call/Put, multiplier, exercise style, and settlement.
- Define whether `S(T1)` is a close, opening value, average, or adjusted reference and what happens on a market disruption.
- Separate pre-start exposure from post-start Delta, Gamma, Theta, and Vega; they are not constant through `T1`.
- Calibrate to tradable vanilla Bid/Ask quotes across both maturities, then test alternative future-skew and forward-volatility dynamics.
- Stress jumps at `T1`, dividends, rates, corporate actions, stale observations, model error, and hedge slippage.
- For embedded sequences such as cliquets, model every reset, cap, floor, local return, and aggregation rule.
- Verify whether the instrument is bilateral, dealer-issued, exchange-listed FLEX, or OCC-cleared; do not infer protections from its name.
- Obtain independent valuation and realistic unwind terms; a theoretical value is not an executable exit price.

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## Common misconceptions

- “It is purchased at `T1`.” The commitment and premium may occur at `t0`; only activation and strike setting are delayed.
- “The future strike is unknown, so the contract cannot be priced today.” It can be valued from a model and market inputs, but the result carries model risk.
- “It is a bet on the price from today to expiration.” Its core payoff measures the return from `T1` to `T2`.
- “An at-the-money forward start is cheap if the stock falls before `T1`.” The strike resets with the reference price.
- “It is equivalent to waiting and buying a vanilla option at `T1`.” The future premium is uncertain; the forward-start contract locks terms and pays for that exposure today.
- “A cliquet is one forward-start option.” A cliquet typically aggregates a sequence of reset-period option-like payoffs with additional caps, floors, or settlement rules.

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## Related topics

- [Cliquet options](/options/cliquet-options/)
- [Implied volatility](/options/implied-volatility/)
- [FLEX options](/options/flex-options/)
- [Event volatility](/options/event-volatility/)

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## Primary and academic sources

- [SEC: Cboe Rule Filing for S&P 500 Annual Cliquet FLEX Options](https://www.sec.gov/file/34-90763)
- [OCC: Characteristics and Risks of Standardized Options](https://www.theocc.com/company-information/documents-and-archives/options-disclosure-document)
- [Nunes and Alcaria: Valuation of Forward Start Options under Affine Jump-Diffusion Models](https://doi.org/10.1080/14697688.2015.1049200)
- [Hobson and Neuberger: Robust Bounds for Forward Start Options](https://wrap.warwick.ac.uk/2937/)