Position Sizing for the Wheel

Why Position Sizing Is the #1 Risk Lever

Most wheel traders obsess over strike selection and DTE but ignore the factor that determines whether a drawdown is survivable or catastrophic: how much capital they commit to a single position. Poor position sizing turns a manageable assignment into a portfolio-ending event.

The Blow-Up Pattern

Trader sells 10 CSPs on a single $50 stock (securing $50,000 of capital in a $100k account). Stock drops 30%. The position is now 70% of the portfolio, and the trader has no cash to sell puts elsewhere or average down. This is how accounts blow up -- not from bad strikes, but from bad sizing.

The 2-5% Rule for Cash-Secured Puts

A disciplined wheel trader risks no more than 2-5% of total portfolio value on any single position's maximum loss. For a CSP, maximum loss is (strike price x 100) minus the premium collected. In practice, this means your secured capital per position should be 20-30% of your portfolio at most, because true max-loss scenarios (stock to zero) are rare for quality underlyings.

Max Contracts per Position

Contracts = floor( (Portfolio x Max_Allocation%) / (Strike x 100) )

Sizing Example: $100k Portfolio

You want to sell CSPs on AAPL at the $170 strike. Capital secured per contract = $17,000. At a 20% max allocation, you can commit $20,000, so you sell 1 contract. At 25%, you could sell 1 contract ($17k < $25k). Never sell 3 contracts -- that would be 51% of your account on a single name.

Portfolio-Level Caps

Beyond per-position limits, cap your total committed capital across all open CSPs at 60-80% of the portfolio. The remaining 20-40% stays in cash or short-term treasuries as a reserve. This reserve is your ammunition during sell-offs -- the margin of safety that lets you sell puts at panic-level premiums while others are forced to liquidate.

Per-position: 2-5% max risk, 15-25% max capital commitment
Per-sector: no more than 30-40% of total portfolio in one sector
Total committed: 60-80% of portfolio across all positions
Cash reserve: 20-40% always available for opportunities or defense

Key Takeaways

•Position sizing -- not strike selection -- is the primary determinant of portfolio survival during drawdowns.
•Limit each position to 2-5% maximum risk and 15-25% capital commitment.
•Maintain a 20-40% cash reserve across the portfolio at all times.

Quick Check

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You have a $200k portfolio and want to sell CSPs on a stock with a $80 strike. Using a 20% max allocation, how many contracts can you sell?

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