SPY option chain loads automatically. Add legs, pick a strategy preset, then explore expiry P/L (intrinsic) and model Greeks from mids (Black–Scholes, educational only).
Ticker
Expiration
Legs
| Side | Type | Strike | Mid | Leg ($) | IV | Qty |
|---|
Maximum 8 legs.
Summary
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Net premium (per spread)
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Net premium (dollars)
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Net Δ (shares eq.)
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Net Γ (per $1 spot)
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Vega (per 1% IV)
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Θ / day (est.)
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Greeks use implied vol from mids, risk-free 4% annual, and time to expiration from now — model only, not live marks.
For education only. Mid prices are from the snapshot; live fills will differ.
Expiry scenario
Intrinsic value at expiration vs. your net premium (debit positive = cash out).
Intrinsic at expiry
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P/L at expiry
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Breakevens (approx.)
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