Running the book

Move from evaluating one option to managing a portfolio. Learn to size obligations, identify shared risks, stress the account, and reconcile performance so that premium receipts do not conceal stock losses or leverage.

By OptionsKing. Publisher and editorial methods.

Learning path

Begin with position sizing, concentration, and correlated outcomes. Calculate what a broad decline does to the account, not only to each contract.

Then examine margin, the performance ledger, and decisions during a drawdown. You should be able to distinguish funding capacity, maximum loss, stress loss, and actual total return.

Lessons

• Option position sizing: funding, stress loss and maximum lossSize options using both contractual loss and explicit stress scenarios. Check funding, concentration and simultaneous portfolio losses.
• Single-ticker concentration risk in an options portfolioCount exposure in dollars and shared factors, not just ticker symbols. Whole option lots can create unintended portfolio weights.
• Correlation risk: different tickers, shared exposureCorrelation changes joint outcomes even when individual probabilities stay fixed. Stress the whole group rather than multiplying marginal odds blindly.
• Cash-secured put losses: maximum loss vs stress scenariosA short put's maximum loss is known but can be large. Use it alongside stress losses rather than discarding either measure.
• Far-out-of-the-money puts: small credits and large tail lossesSmall premium can be overwhelmed by fees and rare losses. Compare incremental return and retained downside, including interest on collateral.
• Margin vs cash accounts: funding, leverage and liquidation riskA smaller collateral requirement does not reduce the delivery obligation. Compare maintenance, account equity and full assignment funding.
• An options income ledger without double countingReconcile stock, option and cash changes with account equity. A premium total alone cannot measure performance.
• Compare covered calls with buy and hold: a worked auditA matched benchmark separates strategy effects from exposure choices. One illustrative year cannot establish persistent outperformance.
• Option seller psychology: process, sizing and outcome biasEvaluate trading decisions using information available at the time. A later recovery cannot prove that closing a risky position was wrong.

One illustrative account

The examples share a simulated $50,000 account with six names and 46 trades over eight cycles. Five puts are assigned in one difficult cycle. The $57,168 ending value is one constructed outcome, not a backtest or a return target.

Stress assumptions and percentage limits are teaching examples, not universal safe thresholds. Include uncommitted cash, changing margin requirements, taxes, costs, and the possibility that a loss is larger or longer-lasting than the scenario.

Common questions

Run your own numbers

• Position size calculator how many contracts the account actually supports.
• Cash-secured put calculator credit, break-even and return on the cash a contract ties up.
• Annualized return calculator any credit and any holding period, as a yearly rate.
• Taxes for option sellers where this book's $4,598 lands on a return.

Sources

• OCC, Characteristics and Risks of Standardized Options

Rules and thresholds above were checked against these documents on August 4, 2026. Exchange and broker rules change. Confirm anything you are about to act on with your own broker.