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Option contracts and underlying-unit amounts

Position amounts use contracts × underlying units per contract × per-unit amounts.

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Read the premium’s unit

The fictional call premium is 6 per underlying unit, and one contract represents 100 units. One contract therefore costs 600. If a separate record already quotes total premium 600 per contract, multiplying that 600 by 100 again would overstate it.

Apply the position quantity

For three such contracts, represented units are 300. A payoff of 10 per unit becomes position payoff 3,000. The quote and contract count describe different multipliers.

Original scaling
InputAmount
Contracts3
Units per contract100
Represented units300
Premium per unit6
Total premium1,800

Use compatible underlying units

A stock leg measured in shares must match the option units in a combined payoff. A one-contract protective position is not automatically one share plus a put when the contract represents 100 shares.

Keep the multiplier contractual

The example’s 100 is a supplied fictional multiplier, not a rule for every exchange or product. Check the actual contract specification before using a real quote. The Academy tool lets the input be stated explicitly.

Further references