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LLY 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 LLY, one managed at 21 DTE. On this simulation the 21-Day Rule finished -47.9 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 return65.6%17.7%-47.9 pp
Annualized return28.8%8.5%-20.3 pp
Buy-and-hold return62.8%62.8%0.0 pp
Max drawdown (from peak equity)17.0%23.5%+6.5 pp
Assignment rate45.5%39.3%-6.2 pp
Call-away rate66.7%57.9%-8.8 pp
Average cycle return6.0%0.6%—
Sample cycles1128—
History days728728—
Entry fills1747—
Entry fills priced from real option bars47%49%—
21-DTE buy-backs priced from real option bars—36%—

How LLY compares

Across the 37 published tickers, the 21-Day Rule finished ahead of holding to expiry on 21 and behind on 16. The LLY total-return delta of -47.9 pp ranks 37th of 37 (1st is where managing early helped most); the median delta is +2.0 pp.

Without the rule, the standard arm returned 65.6% against 62.8% for buy-and-hold, so the plain wheel beat holding the shares by 2.8 percentage points in this simulation.

Among its defensive, healthcare and income peers HYG, TLT, UNH and XLV, the rule finished ahead of holding to expiry on 2 of 4; LLY itself came in at -47.9 pp.

The separate 10 DTE / 2% OTM wheel snapshot for LLY shows a put assignment rate of 31.0% and wheel P&L of $19,237 against $52,246 for buy-and-hold. That is a different recipe from the 35 DTE study on this page, so the two results are not additive.

MetricLLYFamily medianRank (highest first unless noted)
Rule total-return delta-47.9 pp+2.0 pp37th of 37
Rule drawdown delta+6.5 pp-0.6 pp37th of 37 (lowest first)
21-Day total return17.7%16.0%16th of 37
21-Day annualized return8.5%7.7%16th of 37
Standard total return65.6%15.0%1st of 37
21-Day max drawdown23.5%19.0%23rd of 37 (lowest first)
21-Day call-away rate57.9%42.1%2nd of 37
Standard annualized return28.8%7.2%1st of 37
Buy-and-hold return62.8%26.4%8th of 37
Standard max drawdown17.0%20.8%16th of 37 (lowest first)
Standard assignment rate45.5%36.4%10th of 37
21-Day assignment rate39.3%31.8%6th of 37
21-Day sample cycles282816th of 37
21-Day average cycle return0.6%0.6%17th of 37
TickerStandard return21-Day returnRule deltaBuy-and-holdStandard drawdown21-Day drawdownStandard assignment21-Day assignment
LLY65.6%17.7%-47.9 pp62.8%17.0%23.5%45.5%39.3%
HYG0.5%1.4%+0.9 pp-3.2%3.9%4.1%7.1%11.4%
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%

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

LLY buy-and-hold path

Month-end P&L of holding 100 LLY 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 ($26,046) and the worst was 2025-05 (−$16,128).

MonthBuy-and-hold P&LChange in monthRunning highBelow its peakWorst fall so far
2024-11−$3,619—$90$3,709$10,524
2024-12−$5,954−$2,335$90$6,044$10,524
2025-01−$2,046$3,908$90$2,136$10,672
2025-02$8,909$10,955$8,909$0$10,672
2025-03−$563−$9,472$9,818$10,381$12,807
2025-04$6,741$7,304$9,818$3,077$20,881
2025-05−$9,387−$16,128$9,818$19,205$21,601
2025-06−$5,201$4,186$9,818$15,019$21,601
2025-07−$9,147−$3,946$9,818$18,965$21,601
2025-08−$9,896−$749$9,818$19,714$30,407
2025-09−$6,854$3,042$9,818$16,672$30,407
2025-10$3,132$9,986$9,818$6,686$30,407
2025-11$24,393$21,261$27,840$3,447$30,407
2025-12$24,314−$79$27,840$3,526$30,407
2026-01$20,561−$3,753$27,840$7,279$30,407
2026-02$22,045$1,484$27,840$5,795$30,407
2026-03$8,823−$13,222$27,840$19,017$30,407
2026-04$10,306$1,483$27,840$17,534$30,407
2026-05$27,346$17,040$29,526$2,180$30,407
2026-06$36,789$9,443$39,839$3,050$30,407
2026-07$31,730−$5,059$40,402$8,672$30,407
2026-08$32,519$789$44,880$12,361$30,407
2026-09$32,554$35$44,880$12,326$30,407
2026-10$58,600$26,046$58,600$0$30,407
2026-11$52,246−$6,354$58,645$6,399$30,407
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 49% (21-Day) of entry fills and 36% 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 LLY?

On this simulation the 21-Day Rule finished -47.9 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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