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How to Backtest the Wheel Strategy (and Read Backtests Honestly)

A Wheel backtest asks a simple question: if you had followed one fixed set of put-selling and call-selling rules over past prices, what would have happened? Done carefully, it shows how the strategy behaves in calm years and in crashes. Done carelessly, it produces a smooth upward line that no real account will ever match. This guide covers what to define, what to model, and how to read anyone's backtest, including your own.

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The short version

Write the rules down before you look at any results: underlying, delta or strike, days to expiration, when to close or roll, and what to do after assignment.
Model the parts that cost money: realistic fills, commissions, assignment, dividends you receive or lose, and interest on the cash securing the puts.
Test through at least one sharp decline. A put-selling test that skips 2008, early 2020 or 2022 is missing the part that matters most.
Compare against buying and holding the same underlying with the same capital, on total return, not premium collected.
Then forward test with paper trades or one small position before trusting any number.

Step 1: Write the rules before you test

The Wheel has more decisions than it looks. A backtest needs an answer to each one, fixed in advance, or it quietly becomes hindsight.

Rule	What you have to decide	Shortcut that flatters results
Underlying	Which stock or ETF, chosen before testing	Picking a stock that you already know went up
Put strike	A delta (for example 0.20 to 0.30) or a percentage below the price	Trying many deltas and keeping the best one
Expiration	Weekly, about 30 to 45 days, or monthly	Mixing expirations after the fact
Early close	Close at a set profit (for example 50%) or hold to expiration	Assuming every early close fills at the target
Rolling	Whether and when to roll a tested put or call	Rolling for a credit that the market would not have paid
After assignment	Call strike rule, including whether calls may go below cost basis	Ignoring the months when no sensible call paid much
Position size	How much of the account each position uses	Using margin to stack puts without saying so

The guides on strike selection, weekly vs monthly options and rolling cover the trade-offs behind each choice.

Step 2: Model what real trading costs

Fills. Many tests assume you sell at the midpoint between bid and ask. In thinly traded options you often get less. A conservative test fills sells near the bid and buys near the ask, or at least tests both.

Commissions and fees. Small per contract, but a Wheel can trade every week or month for years.

Assignment. When a put finishes in the money, the test must buy 100 shares at the strike and switch to selling calls. Many simple put-selling tests settle the loss in cash and start over, which is a different strategy. Early assignment, especially on calls before an ex-dividend date, should be modeled too.

Dividends. While you hold shares you receive dividends; if your shares are called away just before the ex-dividend date, you don't.

Interest on cash. The cash securing a put can earn interest in a money market or Treasury bills. Leaving it out understates results in high-rate years. Including it is fair, as long as the comparison with simply holding the stock is set up the same way.

Taxes. Most backtests ignore them. Short-term gains from premium can be taxed very differently from long-term gains on shares held for years. See Wheel strategy taxes.

Hypothetical example: how much fills matter. Round numbers for illustration only, not quotes or typical results.

A test sells one $48 put each month for a year. The quote each month is $0.45 bid and $0.55 ask, so the midpoint is $0.50.

Filled at the midpoint: $50 × 12 = $600 of premium.
Filled at $0.47 with $0.65 commission per contract: ($47 − $0.65) × 12 = $556.20.

The gap is $43.80, about 7% of the premium the midpoint test reports. On the $4,800 securing the put, that is close to one percentage point a year, from one assumption, before a single loss.

Step 3: Watch for the usual biases

Survivorship bias. Testing today's well-known winners ignores the stocks that collapsed or were delisted. Broad ETFs such as SPY and QQQ reduce this problem, which is one reason they are common test subjects.
Look-ahead bias. Using information that was not known on the trade date, such as the day's closing price for a trade placed in the morning.
Overfitting. Testing dozens of delta, expiration and profit-target combinations and reporting the best one. The best combination on past data is often just the luckiest.
Too short a period. Selling options produces many small gains and occasional large losses. A two-year test in a rising market can show no large loss at all.
Behavior. A backtest never panics, skips a trade or closes at the bottom. Real traders sometimes do.

Step 4: Compare against the right benchmark

The fair comparison is buying and holding the same underlying with the same starting capital, measured on total return with dividends, over the same dates. Premium collected is not return; what matters is the account value at the end and the worst drop along the way. The guide to realistic Wheel returns explains why annualized premium figures mislead.

A free public reference point is Cboe's put-writing benchmark. The Cboe S&P 500 PutWrite Index (PUT) tracks a rules-based strategy that sells one-month, at-the-money S&P 500 index puts each month and holds Treasury bills as collateral, sized so the cash covers the full strike value. It is essentially a mechanical cash-secured put program on the index. It is not a full Wheel: index options settle in cash, so there is never an assignment into shares or a covered-call phase. Its sister index, the Cboe S&P 500 BuyWrite Index (BXM), tracks holding the index and selling monthly calls, which is the covered-call half. Reading their methodology documents on Cboe's site is a good way to see how a careful rules-based test is written.

Step 5: Read other people's backtests critically

Before trusting a Wheel backtest you find online, check:

Which dates does it cover, and does that include a major sell-off?
How were fills priced, and were commissions included?
Does it actually take assignment and sell calls, or does it settle put losses in cash?
Is it cash-secured, or does it use margin?
Does it report the maximum drawdown and the comparison with buy and hold?
Were the rules chosen before the test, or tuned until the chart looked good?

A test that cannot answer these is a marketing chart, not evidence.

Step 6: Forward test before real money

After a historical test, run the same written rules forward with paper trades or a single small position for a few months. Log every trade, including the ones you skipped. The free Wheel trade tracker works in the browser, and the Wheel calculator helps compare strikes before you place each put or call. A forward test shows what no backtest can: whether you follow the rules when a position goes against you. If you want the reasoning behind each rule as you go, Spin the Wheel, Cash the Checks walks through the cycle from the first put onward.

FAQ

Can you backtest the Wheel strategy for free?

You can test a small number of trades by hand using an end-of-day options history from your broker, if it offers one, and a written log such as a free tracker. Full multi-year backtests need historical options prices, which are usually a paid data product. Published index-based put-writing benchmarks are free to read and give a useful reference.

Does a SPY Wheel backtest tell me what I will earn?

No. A backtest shows how one fixed set of rules would have done on past prices with the assumptions the tester chose. Fills, fees, taxes, the period tested and whether you would really have followed the rules in a crash all change the real result.

What is the biggest mistake in Wheel backtests?

Assuming fills at the midpoint or better and ignoring the losing stretches. Premium-selling strategies have many small wins and a few large losses, so a test that ends before a big drawdown, or that fills every trade at a good price, can look far better than live trading.

Is there an index that tracks a put-selling strategy?

Yes. Cboe publishes put-writing indexes such as the Cboe S&P 500 PutWrite Index (PUT), which sells one-month at-the-money S&P 500 index puts each month and holds Treasury bills as collateral. It is a cash-secured put benchmark, not a full Wheel, because index options settle in cash and never deliver shares.

Should I paper trade the Wheel before using real money?

Paper trading or a very small live position is a sensible forward test. It shows how you handle assignment, rolling decisions and drawdowns, which a historical test cannot measure.