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OptionsMath

Synthetic Stock Calculator

Synthetic stock profit equals long call value minus short put obligation minus net debit for synthetic long stock, or the reverse for synthetic short stock.

Expiration scenarios

Solution

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Educational estimate only, not financial advice. Results exclude commissions, taxes, slippage, dividends, assignment risk, margin, and broker-specific rules. Verify before trading options.

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Synthetic Stock Formula

Synthetic stock combines a call and put at the same strike to mimic long or short shares through expiration.

Worked Examples

Load these examples to compare common synthetic stock payoff outcomes.

SYNTHETIC LONG

Replicate long shares with options

A trader buys a call and sells a same-strike put.

  • Enter the manual prices and assumptions.
  • Review the calculated risk, reward, and break-even metrics.
  • Compare the chart with the highlighted scenario.

Result: the calculator updates the scenario metrics and chart from those inputs.

Real fills, fees, and broker margin rules are not modeled.

How It Works

Synthetic stock uses a same-strike call and put to replicate long or short stock exposure through option expiration.

Example Problem

Choose synthetic long or short stock, then enter the shared strike, call premium, put premium, and expiration stock price.

  1. Build the matching call/put legs.
  2. Calculate net debit or credit.
  3. Find the shared break-even.
  4. Evaluate expiration P/L across stock prices.

Synthetic stock can still create assignment, margin, and dividend risks that differ from holding shares.

Key Concepts

Put-call parity links calls, puts, stock, and cash. Same-strike calls and puts can mimic directional share exposure.

Applications

  • Comparing synthetic shares with stock.
  • Checking parity-based break-evens.
  • Modeling long or short directional exposure without live quotes.

Common Mistakes

  • Ignoring assignment risk on the short leg.
  • Mixing expirations or strikes.
  • Treating synthetic stock as identical to stock for dividends and voting rights.

Frequently Asked Questions

What does the Synthetic Stock Calculator calculate?

It calculates the selected options result from manual inputs, without requiring live stock or option quotes.

Does this calculator need live market data?

No. Enter the prices, premiums, volatility, days, or Greeks yourself. The calculator uses those manual inputs only.

Are commissions, taxes, margin interest, and assignment fees included?

No. The result excludes commissions, fees, taxes, borrow costs, slippage, and broker-specific margin rules.

Why can real trading results differ?

Real option prices can change with implied volatility, liquidity, dividends, early assignment, and execution prices.

Reference: Options Industry Council synthetic stock and put-call parity strategy education.

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