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UNH 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 UNH, one managed at 21 DTE. On this simulation the 21-Day Rule finished -10.0 pp behind holding to expiry — managing early hurt here.

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Arm-by-arm comparison

MetricStandard (hold to expiry)21-Day RuleDelta
Total return-27.5%-37.5%-10.0 pp
Annualized return-14.9%-21.0%-6.1 pp
Buy-and-hold return-36.0%-36.0%0.0 pp
Max drawdown (from peak equity)49.1%52.1%+3.0 pp
Assignment rate57.1%34.6%-22.5 pp
Call-away rate30.0%42.1%+12.1 pp
Average cycle return-3.9%-1.4%—
Sample cycles726—
History days728728—
Entry fills1745—
Entry fills priced from real option bars47%47%—
21-DTE buy-backs priced from real option bars—47%—

How UNH compares

Across the 37 published tickers, the 21-Day Rule finished ahead of holding to expiry on 21 and behind on 16. The UNH total-return delta of -10.0 pp ranks 30th of 37 (1st is where managing early helped most); the median delta is +2.0 pp.

Without the rule, the standard arm returned -27.5% against -36.0% for buy-and-hold, so the plain wheel beat holding the shares by 8.5 percentage points in this simulation.

Among its defensive, healthcare and income peers HYG, KO, TLT and XLV, the rule finished ahead of holding to expiry on 2 of 4; UNH itself came in at -10.0 pp.

The separate 10 DTE / 2% OTM wheel snapshot for UNH shows a put assignment rate of 32.1% and wheel P&L of −$25,244 against −$22,166 for buy-and-hold. That is a different recipe from the 35 DTE study on this page, so the two results are not additive.

MetricUNHFamily medianRank (highest first unless noted)
Rule total-return delta-10.0 pp+2.0 pp30th of 37
Rule drawdown delta+3.0 pp-0.6 pp33rd of 37 (lowest first)
21-Day total return-37.5%16.0%37th of 37
21-Day annualized return-21.0%7.7%37th of 37
Standard total return-27.5%15.0%36th of 37
21-Day max drawdown52.1%19.0%36th of 37 (lowest first)
21-Day call-away rate42.1%42.1%19th of 37
Standard annualized return-14.9%7.2%36th of 37
Buy-and-hold return-36.0%26.4%36th of 37
Standard max drawdown49.1%20.8%35th of 37 (lowest first)
Standard assignment rate57.1%36.4%5th of 37
21-Day assignment rate34.6%31.8%13th of 37
21-Day sample cycles262825th of 37
21-Day average cycle return-1.4%0.6%37th of 37
TickerStandard return21-Day returnRule deltaBuy-and-holdStandard drawdown21-Day drawdownStandard assignment21-Day assignment
UNH-27.5%-37.5%-10.0 pp-36.0%49.1%52.1%57.1%34.6%
HYG0.5%1.4%+0.9 pp-3.2%3.9%4.1%7.1%11.4%
KO28.9%26.1%-2.8 pp49.7%11.2%7.5%28.6%26.9%
TLT5.9%-2.3%-8.2 pp-11.4%12.0%11.4%60.0%23.8%
XLV5.7%9.8%+4.1 pp23.1%13.0%10.2%23.1%38.1%

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

UNH buy-and-hold path

Month-end P&L of holding 100 UNH 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 2026-04 ($9,989) and the worst was 2025-04 (−$11,231).

MonthBuy-and-hold P&LChange in monthRunning highBelow its peakWorst fall so far
2024-11−$561—$944$1,505$4,825
2024-12−$10,995−$10,434$944$11,939$13,973
2025-01−$7,332$3,663$944$8,276$13,973
2025-02−$14,085−$6,753$944$15,029$16,373
2025-03−$9,206$4,879$944$10,150$16,373
2025-04−$20,437−$11,231$944$21,381$21,602
2025-05−$31,390−$10,953$944$32,334$35,090
2025-06−$30,384$1,006$944$31,328$35,090
2025-07−$36,625−$6,241$944$37,569$37,569
2025-08−$30,594$6,031$944$31,538$38,748
2025-09−$27,051$3,543$944$27,995$38,748
2025-10−$27,425−$374$944$28,369$38,748
2025-11−$28,604−$1,179$944$29,548$38,748
2025-12−$28,570$34$944$29,514$38,748
2026-01−$32,888−$4,318$944$33,832$38,748
2026-02−$32,254$634$944$33,198$38,748
2026-03−$34,522−$2,268$944$35,466$38,748
2026-04−$24,533$9,989$944$25,477$38,748
2026-05−$23,550$983$944$24,494$38,748
2026-06−$20,018$3,532$944$20,962$38,748
2026-07−$20,141−$123$944$21,085$38,748
2026-08−$22,640−$2,499$944$23,584$38,748
2026-09−$24,873−$2,233$944$25,817$38,748
2026-10−$20,884$3,989$944$21,828$38,748
2026-11−$22,166−$1,282$944$23,110$38,748
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 47% (21-Day) of entry fills and 47% 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 UNH?

On this simulation the 21-Day Rule finished -10.0 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.

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