Calculate a long-low-call and short-high-call spread at expiry.
It makes the prices, cash flows, rates, time periods, weights, and model conventions explicit so you can inspect an entered scenario without hidden live-market assumptions.
Strikes 100/110, debit 4, expiry 108, quantity 100 produce 400.
Results use only entered expiry prices and contract assumptions. They exclude taxes, assignment, early exercise, liquidity, slippage, margin changes, and broker rules unless a field explicitly includes them.
Quick guide
How to use this calculator
Enter the contract, market, expiry, rate, and position assumptions named by the fields.
Keep premiums, prices, multipliers, contract counts, and time conventions consistent.
Read the exact expiry-payoff or model assumptions before interpreting the result.
Fixed decimals accept up to 30 digits and 12 decimal places with absolute values capped at 1e12. General rates are bounded from −100% through 1000% where signed rates are meaningful.
No contract or market feed
No exchange specification, live quote, exercise style, dividend schedule, settlement rule, margin model, or contract multiplier is selected automatically.
Decision boundary
Outputs are entered scenarios, not quotes, forecasts, arbitrage findings, risk limits, suitability judgments, or recommendations.
Calculator-specific assumptions
Results use only entered expiry prices and contract assumptions. They exclude taxes, assignment, early exercise, liquidity, slippage, margin changes, and broker rules unless a field explicitly includes them.
