Options guide · Reviewed 31 October 2026
Using an options calculator when the underlying is gold or bitcoin
A prefilled gold, silver, bitcoin or ether price is a spot reference. An option is written on something specific: fund shares, or a futures contract. Before trusting a calculator's output, check that the price, the multiplier and the volatility describe your actual contract.
What the prefilled price is
The option price calculator can prefill its underlying-price field with a gold, silver, bitcoin or ether price. These are US-dollar spot references, cached by LikeOptions and refreshed at most twice a day. A price LikeOptions has not refreshed within 36 hours is not offered. After you click a prefill button, the page shows when the quote was struck and where it came from, and you can overwrite it. Gold and silver are per troy ounce.
Treat it as a convenience, not a quote. It can be hours old, and it is not the price of any particular option's underlying.
Match the underlying price to the contract
| If your option is written on... | The price to use is... |
|---|---|
| Shares of a gold or bitcoin fund | That fund's share price |
| COMEX gold futures | The gold futures price |
| CME bitcoin futures | The bitcoin futures price, in dollars per bitcoin |
CME lists its gold option's underlying as gold futures, and its bitcoin option as a right over one bitcoin futures contract. See the guide to options on gold and the guide to bitcoin options.
The option price calculator is a Black-Scholes model built around a stock price. Its page does not say whether that fits futures options, so treat its output for those contracts as a rough guide at most, and compare it with the market quote.
Match the multiplier
The options profit calculator multiplies by 100, the usual figure for stock options. CME's figures (read 31 October 2026):
| Contract | Units per contract |
|---|---|
| COMEX gold option | 100 troy ounces, premium quoted per ounce |
| CME option on (standard) Bitcoin futures | 1 bitcoin futures contract, representing 5 bitcoin, premium quoted per bitcoin |
For gold, 100 matches (for gold as an asset, see the gold and commodity investing guide). For a CME bitcoin option, scale the profit calculator's profit and loss figures by 5 ÷ 100 = 0.05. Micro Bitcoin and Bitcoin Friday options are smaller; check their specifications. For fund-share options, take the multiplier from your contract specification.
Match the volatility
The option price calculator starts with a volatility of 30%. That is a placeholder, not a statement about any asset. Black-Scholes is sensitive to volatility, so a wrong input can move the answer a lot. Read the implied volatility from the option chain for the same strike and expiry rather than using the default. The Black-Scholes guide explains how the five inputs combine into a price.
Match the exercise style
Black-Scholes values a European-style option, exercisable only at expiry. CME says all its cryptocurrency options are European-style. For the exercise style of any other option, read your contract specification. See American vs. European options.
A checklist
- Is the option written on fund shares or on a futures contract?
- Is the price you typed the price of that instrument?
- What is the contract's multiplier, and does the calculator use the same one?
- Is the volatility the market's implied figure for this strike and expiry?
- Is the option European or American style, and does it matter for your position?
Questions people ask
Why does the calculator disagree with my broker's quote?
Any of the checklist items can cause it. Check them in order, starting with whether the underlying price is the right instrument's.
Does the prefill set up the whole option?
No. It fills the price field only. Strike and time to expiry come from your contract, volatility from the market's implied figure, and you set the risk-free rate.
Is the prefilled price live?
No. It is cached and can be hours old.
Is this advice?
No. This is about using a calculator correctly. It suggests no trade, and options can lose their whole premium.
Source note: Contract details were read from CME Group pages on 31 October 2026 and can change. This is educational information, not investment advice or a recommendation to buy or sell anything. All calculator inputs stay in your browser.