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Financial Context Wiki

Option Contract Multiplier and Deliverable

For educational purposes only; not investment advice.

Direct answer

Section titled “Direct answer”

An option’s contract multiplier converts a per-unit quote or value change into the dollar amount for one contract. Standard listed U.S. equity options commonly use a 100 multiplier and ordinarily represent 100 shares, so a premium quote of $1.35 normally means $135 per contract before fees:

Contract premium = quoted premium x multiplier

The multiplier is not always sufficient to describe the contract. The deliverable states what changes hands after exercise or assignment. Corporate actions can produce adjusted options with nonstandard shares, cash, other securities, or a combination. Product specifications and OCC adjustment information, not habit, determine the actual economics.

What the multiplier changes

Section titled “What the multiplier changes”

For quantity Q, quote P, multiplier M, and quote change dP:

Position cash premium = Q x P x M

Approximate option P&L from quote change = Q x dP x M

For a standard physically settled equity option, exercise or assignment commonly involves Q x 100 shares. The strike cash associated with one exercised standard contract is generally:

Strike cash = strike x 100

These are different measures:

  • Premium cash: what is paid or received for the option.
  • Exercise cash or delivery: what is required or delivered if the contract is exercised or assigned.
  • Underlying notional: underlying price times the share quantity represented.
  • Delta-equivalent exposure: Delta times multiplier and contract count; it changes as the market moves and is not the same as notional.
  • Maximum risk: determined by the entire position and contract terms, not by the multiplier alone.

Cash-settled index options use a settlement amount rather than share delivery. Some products have different multipliers, and adjusted equity options can retain a familiar-looking quote while their deliverable has changed. Multi-leg strategies require applying the correct quantity, ratio, multiplier, and deliverable to every leg.

From a quote to account exposure

Section titled “From a quote to account exposure”

Assume a standard equity put has an $85 strike, a $1.35 premium, a 100 multiplier, and Delta of -0.42. The stock is $82.00.

For one contract:

Premium received or paid = $1.35 x 100 = $135

Underlying notional = $82.00 x 100 = $8,200

Current Delta-equivalent exposure = -0.42 x 100 = -42 shares

If the option quote moves from $1.35 to $1.95, the $0.60 change is $60 per contract. A long contract gains about $60; a short contract loses about $60, before fees and spread effects.

If one short put is assigned, the account commonly buys 100 shares at $85, requiring $8,500 of strike cash, not $135. The premium received affects net economics but does not reduce the contractual purchase price used for assignment processing.

For three contracts, the scale becomes:

  • Premium cash: $1.35 x 100 x 3 = $405
  • Standard share quantity: 100 x 3 = 300 shares
  • Strike cash if all three short puts are assigned: $85 x 100 x 3 = $25,500
  • Initial Delta-equivalent exposure: -0.42 x 100 x 3 = -126 shares

Now consider a hypothetical contract marked Adjusted whose official detail says the deliverable is 75 shares + $320 cash, while its quote multiplier remains 100. A $1.35 quote can still represent $135 of premium, but exercise does not deliver 100 regular shares. The adjusted strike, settlement allocation, and deliverable must be read together from the contract memo; multiplying spot by 100 would give the wrong exercise exposure.

Multiplier and deliverable risks

Section titled “Multiplier and deliverable risks”
  • Quote-unit error: reading $1.35 as the total contract price understates a standard contract’s premium by 100 times.
  • Assignment funding error: option premium is much smaller than the strike cash or stock position that assignment can create.
  • Contract-count error: every extra contract scales premium, Greeks, exercise quantity, and many risks.
  • Adjusted-contract error: “100” on one field does not prove the deliverable is 100 ordinary shares.
  • Product mismatch: equity, ETF, index, mini, and other listed options can have different settlement and multiplier terms.
  • Notional/Delta confusion: share notional is not current directional sensitivity; Delta also changes.
  • Cash-settlement error: applying a share-delivery formula to a cash-settled product produces the wrong obligation.
  • Spread-ratio error: a 1:2 strategy does not have the same contract count on every leg.
  • Platform display error: some interfaces show per-unit premium, others total contract cash or strategy net amounts; labels must be checked.
  • Corporate-action timing: open orders, symbols, strikes, and deliverables can change after an adjustment.

Before submitting an order, verify the multiplier, deliverable, settlement type, adjustment marker, contract quantity, strike cash, total premium, and outcome after exercise or assignment. Recheck existing positions after splits, mergers, spinoffs, and special distributions.

Common misconceptions

Section titled “Common misconceptions”

“A $1.35 option costs $1.35.” With a standard 100 multiplier, one contract normally represents $135 before fees.

“Every U.S. option represents 100 shares.” Standard equity options commonly do, but other products and adjusted contracts can differ.

“The multiplier is my maximum loss.” It only scales quoted values; maximum loss depends on position structure and settlement obligations.

“Receiving $135 on a short put means only $135 is at risk.” Assignment can create an $8,500 stock purchase obligation at an $85 strike.

“A 100 multiplier guarantees a 100-share deliverable.” Premium scaling and the exercise deliverable must be verified as separate contract fields.

Section titled “Related topics”

Authoritative sources

Section titled “Authoritative sources”