Days to Expiry — Options Portfolio Tracker logo
Days to Expiry

XLP 21-Day Rule research

Public recipe: cash-secured wheel sized to equity, 35 DTE / 2% OTM puts and calls, manage at 21 DTE. Simulated window 2024-11-08 to 2026-11-06.

Two paired wheel simulations on XLP, one managed at 21 DTE. On this simulation the 21-Day Rule finished -0.5 pp behind holding to expiry — managing early hurt here.

Live broker sync, true cost basis after rolls. No card.

Arm-by-arm comparison

MetricStandard (hold to expiry)21-Day RuleDelta
Total return18.3%17.8%-0.5 pp
Annualized return8.8%8.6%-0.2 pp
Buy-and-hold return11.5%11.5%0.0 pp
Max drawdown (from peak equity)7.9%8.0%+0.1 pp
Assignment rate57.1%21.4%-35.7 pp
Call-away rate30.0%27.8%-2.2 pp
Average cycle return2.6%0.6%—
Sample cycles728—
History days728728—
Entry fills1746—
Entry fills priced from real option bars47%46%—
21-DTE buy-backs priced from real option bars—37%—

How XLP compares

Across the 37 published tickers, the 21-Day Rule finished ahead of holding to expiry on 21 and behind on 16. The XLP total-return delta of -0.5 pp ranks 24th of 37 (1st is where managing early helped most); the median delta is +2.0 pp.

Without the rule, the standard arm returned 18.3% against 11.5% for buy-and-hold, so the plain wheel beat holding the shares by 6.9 percentage points in this simulation.

Among its defensive, healthcare and income peers LLY, TLT, UNH and XLV, the rule finished ahead of holding to expiry on 1 of 4; XLP itself came in at -0.5 pp.

The separate 10 DTE / 2% OTM wheel snapshot for XLP shows a put assignment rate of 28.6% and wheel P&L of $421 against $926 for buy-and-hold. That is a different recipe from the 35 DTE study on this page, so the two results are not additive.

MetricXLPFamily medianRank (highest first unless noted)
Rule total-return delta-0.5 pp+2.0 pp24th of 37
Rule drawdown delta+0.1 pp-0.6 pp20th of 37 (lowest first)
21-Day total return17.8%16.0%15th of 37
21-Day annualized return8.6%7.7%15th of 37
Standard total return18.3%15.0%15th of 37
21-Day max drawdown8.0%19.0%3rd of 37 (lowest first)
21-Day call-away rate27.8%42.1%30th of 37
Standard annualized return8.8%7.2%15th of 37
Buy-and-hold return11.5%26.4%30th of 37
Standard max drawdown7.9%20.8%2nd of 37 (lowest first)
Standard assignment rate57.1%36.4%5th of 37
21-Day assignment rate21.4%31.8%28th of 37
21-Day sample cycles282816th of 37
21-Day average cycle return0.6%0.6%16th of 37
TickerStandard return21-Day returnRule deltaBuy-and-holdStandard drawdown21-Day drawdownStandard assignment21-Day assignment
XLP18.3%17.8%-0.5 pp11.5%7.9%8.0%57.1%21.4%
LLY65.6%17.7%-47.9 pp62.8%17.0%23.5%45.5%39.3%
TLT5.9%-2.3%-8.2 pp-11.4%12.0%11.4%60.0%23.8%
UNH-27.5%-37.5%-10.0 pp-36.0%49.1%52.1%57.1%34.6%
XLV5.7%9.8%+4.1 pp23.1%13.0%10.2%23.1%38.1%

XLP wheel snapshot — the other published study on this ticker.

XLP buy-and-hold path

Month-end P&L of holding 100 XLP shares over the same window as this study, taken from the stored series of the 10 DTE wheel snapshot. The best month for holders was 2026-10 ($882) and the worst was 2026-03 (−$803).

MonthBuy-and-hold P&LChange in monthRunning highBelow its peakWorst fall so far
2024-11$240—$240$0$91
2024-12−$221−$461$240$461$485
2025-01−$184$37$240$424$699
2025-02$226$410$278$52$699
2025-03$85−$141$278$193$699
2025-04$101$16$278$177$725
2025-05$201$100$278$77$725
2025-06$15−$186$278$263$725
2025-07−$104−$119$278$382$725
2025-08−$4$100$278$282$725
2025-09−$245−$241$278$523$725
2025-10−$454−$209$278$732$732
2025-11−$145$309$278$423$800
2025-12−$314−$169$278$592$800
2026-01$269$583$278$9$800
2026-02$919$650$919$0$800
2026-03$116−$803$919$803$890
2026-04$349$233$919$570$895
2026-05$209−$140$919$710$895
2026-06$225$16$919$694$895
2026-07$423$198$919$496$895
2026-08$416−$7$919$503$895
2026-09−$22−$438$919$941$941
2026-10$860$882$919$59$968
2026-11$926$66$1,112$186$968
Problem

A single ticker result is context, not a verdict

One ticker and one window prove nothing general; the rule arm sometimes cannot exit at 21 DTE

Solution

What this paired simulation produced

Window and freshness

Period 2024-11-08 to 2026-11-06, refreshed 2026-11-08.

Limitations

Premiums may include model fills (BSM/IV) when market quotes were missing.
  • Simulated results of one fixed recipe over one historical window; not collected income and not a prediction.
  • The rule arm could not exit at 21 DTE on 0 short options and held those to expiry.
  • Modelled pricing: real option bars priced 47% (standard) and 46% (21-Day) of entry fills and 37% of 21 DTE buy-backs; the rest used implied or realized volatility where market quotes were missing.

Frequently Asked Questions

Everything you need to know about getting started

Did the 21-Day Rule help on XLP?

On this simulation the 21-Day Rule finished -0.5 pp behind holding to expiry — managing early hurt here.

What recipe was simulated?

Same wheel, but the 21-Day arm buys each short option back at 21 DTE; an in-the-money put then takes the shares at that day's close and an in-the-money call delivers them.

Ready to Get Started?

Join traders who are already using our tools to make better decisions.

Live broker sync, true cost basis after rolls. No card.