Commodities

Commodity Option

Also known as: Options on futures

Optionality on oil, gold and grain — almost always struck on the future, not the physical.

Asset class
Commodities
Instrument type
Option on a future
Traded
Exchange + OTC
Typical users
Producers, consumers, trading houses
A producer's classic hedge: a long put on the future — floor below the strike, upside kept.
KLong putUnderlying price at expiryProfit / loss
BeginnerWhat is it, really?

Commodity options work like equity options with one structural twist: the underlying is almost always the futures contract, not the physical good — exercising an oil option gives you an oil futures position, not barrels at your door.

The archetypal users bracket the market from both sides. An oil producer buys puts: a guaranteed floor under next year's revenue while keeping the upside if prices rally — insurance many shale companies literally must buy under their loan agreements. A food company buys calls on wheat: a ceiling on ingredient costs without giving up the benefit of a good harvest.

Between them sit the trading houses and market makers, warehousing the volatility risk that both sides shed.

Key intuition: futures lock a price; options buy a boundary — a floor for sellers of stuff, a cap for buyers of stuff — leaving the good side of uncertainty intact.
IntermediateHow it works in practice

Market anatomy

  • Listed: options on WTI/Brent, gold, corn etc., expiring shortly before their underlying future; American-style mostly.
  • OTC / Asian options: real-world hedges follow average prices (a refinery buys crude all month), so average-price (Asian) options dominate corporate hedging — cheaper too, since averaging lowers volatility.
  • Structures: costless collars (buy put, sell call) are the standard producer package; three-way collars (sell a lower put too) juice the economics and famously backfire in crashes.

Commodity volatility has its own personality

  • Skew flips by market: oil fears spikes (calls rich in supply-shock eras) and crashes; agriculture fears weather (call skew into growing season); gold behaves like a currency.
  • Samuelson effect: volatility rises as contracts approach expiry — near-month options carry the most vol per day.
  • Event vol: OPEC meetings, WASDE crop reports, inventory Wednesdays — term structures kink around known dates.
Worked example: a producer hedges 1M barrels with $70 puts costing $3. Oil at $55 at expiry → puts pay $15M, revenue floor held at ~$67 net. Oil at $95 → puts die, revenue rides to $95 minus the $3 insurance. Compare the collar version: sell $90 calls to finance the puts — zero premium, upside capped at $90.
AdvancedPricing & valuation

Black-76: the sector's workhorse

Options on futures discount the future's expectation — no carry, storage or convenience yield needed (the future already embodies them):

$$ C = e^{-rT}\big[F_0 N(d_1) - K N(d_2)\big], \qquad d_{1,2} = \frac{\ln(F_0/K) \pm \tfrac{1}{2}\sigma^2 T}{\sigma\sqrt{T}} $$

This sidesteps the unobservable convenience yield entirely — the deep reason commodity option markets standardised on futures underlyings.

Asian option pricing

Arithmetic-average payoffs lack closed forms under lognormal dynamics; practice uses moment-matching (Turnbull–Wakeman), geometric-average control variates in Monte Carlo, or PDE methods. Averaging cuts effective vol by roughly \(\sqrt{3}\) for a full-period average — the pricing intuition behind their corporate popularity.

Smile modelling with term structure

Each futures month is its own underlying with its own smile; models must respect the Samuelson vol ramp and inter-month correlation. Desks run forward-curve models (multi-factor HJM-style, e.g. Clewlow–Strickland) calibrated to the option grid — essential for calendar-spread options, storage and swing contracts, where inter-month dynamics are the product.

Real options connection

Physical assets are options in costume: a peaker plant = strip of spark-spread calls; storage = calendar-spread straddles; a mine = compound option on the metal. Commodity option markets supply the implied parameters with which the physical world's assets get valued.

Practitioner note: know which "vol" you're quoting — futures month, average-price window, or spread — and check the skew's direction before importing equity intuitions. In commodities, the crash can be up.

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