Gold put size calculator.

GLD Put Sizing Calculator

Estimate how many GLD puts you can conservatively sell and the level of monthly income the position might generate, based on your collateral type and risk tolerance. This calculator accompanies my longer Substack article on the strategy: How I Generate Steady Income Selling GLD Puts.

For quick reference while using this calculator, you can view the current GLD price and the GLD options chain on Yahoo Finance. These resources make it easy to check spot prices, strikes, implied volatility, and real-world premiums.

This tool is intentionally conservative, designed to keep the probability of a margin call extremely low. It is for educational purposes only and does not reflect your broker’s precise margin rules. This is not investment, tax, or trading advice.

Portfolio value ($)

Collateral type

Risk tolerance

Margin type

Current GLD price ($) (from your broker or Yahoo Finance)

Short put strike ($) (auto-fills ≈2% below, but you can edit)

Estimated margin per put ($) (auto-calculated from strike & margin type)

Premium received per 30-day put ($)

Adjust the inputs on the left to see suggested sizing, income estimates, and approximate paper P/L for 5% and 10% GLD drops.