Measuring an Options Income Book Honestly
Three popular metrics can all improve while the account gets worse. Here is what to measure instead.
Worth reading first: Cash-Secured Puts, From Cash to Assignment
Course catalogue99 lessons
Three of the most commonly quoted numbers in premium selling, win rate, premium collected, and annualised return, can all improve at once while an account gets smaller.
That is not a trick or an edge case. It follows from how the strategy generates and reports value, and this is the pillar page for measuring it properly.
The same trade, measured across time
Profit accumulating against days held, with annualised figures for closing early against holding. Return needs both a capital denominator and a time denominator to mean anything.
- Profit captured, stock held still
Closing early gives back some premium and frees the capital sooner. Whether that trade is worth making is an arithmetic question, and the two annualised figures above answer it. Assuming, importantly, that you actually have somewhere good to redeploy the capital.
The three metrics that mislead
Win rate is a structural property of selling out-of-the-money options, not evidence of skill. Sell far enough out and you win 90% of the time whether you analysed anything or not. See win rate versus expectancy.
Premium collected is an activity measure, not a return. It is identical across a wheel that made $1,100 and one that lost $1,300, see measuring a wheel honestly.
Annualised return is a comparison unit computed from a scenario where the trade works. It excludes losing cycles by construction. See what it actually claims.
None of the three is wrong. All three answer narrower questions than people use them for.
What to measure instead
| Metric | Answers | Why it earns its place |
|---|---|---|
| Realised P&L | What has the book made? | The only figure that reconciles |
| Unrealised position | What is still at stake? | Where wheel losses hide |
| Return per dollar-day | How well is capital used? | Comparable across trades |
| Utilisation | How much capital works? | Deployed returns are not account returns |
| Maximum drawdown | How bad has it been? | Volatility understates negative skew |
| Expectancy | Is the edge real? | Win rate without it says nothing |
A working set for an options income book.
Every return needs two denominators
Return = profit ÷ (capital committed × time committed)Capital and time. A dollar figure with neither is not a return.
“I made $4,000 this year” is unmeasurable. On $20,000 it is excellent; on $400,000 it is poor. Held for two months it is one thing; for twelve it is another.
This is also why roll chains matter for measurement and not only for P&L: without the chain, the time denominator is unknown.
Against what?
A return is meaningless without an alternative. For premium selling the alternatives are specific:
- For a wheel on one stock, having held that stock.
- For a diversified book, a broad index.
- For covered calls on an existing position. That position without the calls.
Never cash or zero, which flatters the strategy in exactly the markets where it underperforms. See benchmarking.
Measuring on a schedule
Monthly: reconcile, then record realised and unrealised.
Quarterly: the review that justifies the whole exercise, outcomes by delta band, whether closing early beat holding, what fees took, which underlyings produced the losses.
Annually: the benchmark comparison and an honest look at drawdown.
Measurement without review is filing. The point is the decision it changes.
What can go wrong
Optimising the metric rather than the result. Win rate is trivially improvable and doing so lowers expected value.
Summing realised and unrealised. Wrong for income, wrong for risk.
Reporting dollar totals. No capital, no time, no meaning.
Measuring but never reviewing. The most common failure of all.
Key takeaways
- Win rate, premium collected and annualised return can all rise while the account falls.
- Keep realised P&L and the unrealised position separately. Together they expose the failure mode either hides.
- Every return needs a capital denominator and a time denominator; a dollar figure has neither.
- Benchmark against the realistic alternative. Holding the stock or the index, never cash.
- The quarterly review is what makes measurement worth doing.
Check your understanding
1. Which two figures, kept separately, best expose a deteriorating premium book?
2. Why is 'I made $4,000 this year' not a performance figure?
3. Why is win rate a poor primary metric for premium selling?
Everything in Performance & Metrics
- What an Annualised Return Actually Claims· It assumes perfect redeployment and no losses. That makes it a comparison unit, not a projection.
- Two Denominators, Two Very Different Numbers· The same trade looks modest or spectacular depending on what you divide by.
- A 90% Win Rate Tells You Almost Nothing· Selling further out raises the win rate and lowers the expected value simultaneously.
- The Part of a Wheel's Return Everyone Leaves Out· Premium collected is not the return. The shares sitting underwater are part of the same trade.
- Comparing Premium Income to Just Owning the Index· A fair comparison has to price the idle capital and the assigned-share periods too.
- Return Per Dollar-Day of Capital· Two trades with the same credit are not equal if one holds twice the cash twice as long.
- The Tail That Win Rate Hides· Long quiet stretches punctuated by sharp losses. Model the shape before you meet it.
- What Premium Selling Actually Pays· Deliberately unglamorous calibration against what gets claimed online.
Related lessons
- A 90% Win Rate Tells You Almost Nothing· Selling further out raises the win rate and lowers the expected value simultaneously.
- What an Annualised Return Actually Claims· It assumes perfect redeployment and no losses. That makes it a comparison unit, not a projection.
- The Tail That Win Rate Hides· Long quiet stretches punctuated by sharp losses. Model the shape before you meet it.
Track what you have worked through. No account needed. View transcript
This browser only