Underlying & Expiration
Implied Rate
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Implied annualized rate at each available strike width. Wider boxes spread fixed costs over more notional, so their implied rates sit closer to the true market financing rate; narrow boxes show more fee drag and quote noise.
Calculator
Default: IBKR per-contract options rate
Implied annualized rate (compounded)
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Simple annualized rate—
Notional at expiry—
Gross (before commissions)—
Commissions (4 legs × qty)—
Net proceeds today—
Commission drag on rate—
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Show the math
The four legs (trade as a single spread order — never leg in)
| Action | Type | Contract | Expiry |
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Market
| Rate | Size | Spread | Price |
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