Calculate combined stock and long-put result 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.
Calculation structure
Follow the stated model and units
Profit per unit = expiry−stock cost+max(strike−expiry,0)−premium.
Visual explanation
See how the inputs become the result
Market at expiryContract payoff
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Premium and costsNet outcome
Profit per unit = expiry−stock cost+max(strike−expiry,0)−premium.
Read the estimate correctly
Use the result within its boundaries
Stock cost 100, put strike 90, premium 3, and expiry 80 produce −13 per unit.
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.
Calculation method
Calculation method
Profit per unit = expiry−stock cost+max(strike−expiry,0)−premium.
Expiry-payoff arithmetic uses the entered terminal underlying price. Model-derived values are explicitly estimates and reject unsupported domains.
Worked example
Worked example
Stock cost 100, put strike 90, premium 3, and expiry 80 produce −13 per unit.
Profit per unit = expiry−stock cost+max(strike−expiry,0)−premium.
Supported inputs
Precision and limits
Visible input limits
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.
