undamentalytics Newsletter

Congress: members

Jonathan L. Jackson

Backtest from 15 May 2023 to 2 Nov 2026 · weekly · hypothetical

Watch this strategy
Return a year
+23.0%
S&P 500 +20.6%
Last 12 months
+7.3%
S&P 500 +12.1%
Sharpe ratio
0.96
S&P 500 1.07
Biggest drop
−21.4%
S&P 500 −16.9%
$10.0k$20.0k 2023202420252026 $20.5k$19.1k
Jonathan L. JacksonS&P 500 $10,000 in Jonathan L. Jackson from 15 May 2023 against the S&P 500 (total return) over the same dates, marked weekly, log scale. Hypothetical: before taxes and trading costs.

About

Mirrors the disclosed stock holdings of Rep. Jonathan L. Jackson (Democrat, IL) and family. It buys on the first trading day after each report is filed, sized by the middle of the value band reported, starts from the holdings listed in the member's annual disclosure report once that report is public, and holds each position until a sale is reported. Call options count as the stock until they expire. Members often report weeks or months late, so this is what a follower could actually have done.

Jonathan L. Jackson's trades →

Key statistics

MeasureStrategyS&P 500
Return a year (compound)+23.0%+20.6%
Total return+105%+91%
Last 12 months+7.3%+12.1%
Last 3 months−1.4%—
Last month−1.6%—
This year so far+6.6%—
Volatility a year18.3%13.9%
Sharpe ratio0.961.07
Biggest drop−21.4%−16.9%
Beta to the S&P 5001.151.00
Alpha a year (t-statistic)+0.4% (0.09)—
Share of weeks up58%—

Sharpe ratio uses returns above the 3-month Treasury bill rate. Alpha is the yearly return left after allowing for the strategy's exposure to the S&P 500 (CAPM); a t-statistic below about 2 means it cannot be told apart from luck. 184 reported trades were copied.

Insights

CompanyWeightHeld sinceReturn since
CAH14.3%16 Feb 2024+152.8%
PH12.1%15 May 2023+192.6%
NVDA12.0%15 May 2023+610.3%
C9.0%24 Feb 2026+13.7%
MSFT9.0%28 Apr 2026+21.0%
MAR6.3%10 Jul 2023+123.7%
AME5.6%15 May 2023+70.4%
HIG5.1%16 May 2025+5.3%
SPG4.8%23 Sept 2024+45.9%
EL4.7%20 Oct 2026−0.0%
DDOG3.9%20 Oct 2026−15.7%
JPM3.3%8 May 2024+83.7%
EME2.8%12 Sept 2023+211.3%
GH2.1%20 Oct 2026+5.0%
GEV2.0%24 Feb 2026−1.8%
WMB0.6%26 Aug 2025+30.8%
WELL0.6%13 Mar 2026+15.1%
HLT0.6%16 Jul 2026+12.2%
AVGO0.5%16 May 2025+44.1%
CW0.4%28 Apr 2026−31.0%
SPHR0.4%16 Jul 2026−24.2%
PeriodReturn a yearS&P 500SharpeS&P 500Biggest dropBetaAlpha (t)
Whole backtest15 May 2023 to 2 Nov 2026+23.0%+20.6%0.961.07−21.4%1.15+0.4% (0.09)
Last three years3 Nov 2023 to 2 Nov 2026+20.5%+21.8%0.861.16−21.4%1.15−2.8% (−0.53)
Last year7 Nov 2025 to 2 Nov 2026+7.4%+14.2%0.300.84−8.8%0.89−4.7% (−0.51)
DateCompanyAction
20 Oct 2026GHBought
20 Oct 2026ELBought
20 Oct 2026DDOGBought
16 Jul 2026SPHRBought
16 Jul 2026HLTBought
28 Apr 2026MSFTBought
28 Apr 2026MCKBought
28 Apr 2026CWBought
13 Mar 2026WELLBought
24 Feb 2026WMTBought
24 Feb 2026VSATBought
24 Feb 2026GEVBought
24 Feb 2026CBought
9 Jan 2026PLTRBought
8 Dec 2025STTBought
11 Nov 2025SHOPBought
16 Oct 2025THCBought
16 Oct 2025HOODBought
24 Sept 2025LRCXBought
24 Sept 2025DOCSBought
26 Aug 2025WMBBought
26 Aug 2025METABought
26 Aug 2025LLYBought
26 Aug 2025GSBought
26 Aug 2025ARMBought

Dated on the first trading day after the report was filed, when a follower could have acted.

DateCompanyAction
20 Oct 2026WMTSold
20 Oct 2026VSATSold
16 Jul 2026MCKSold
28 May 2026VSold
28 May 2026THCSold
28 Apr 2026STTSold
28 Apr 2026LLYSold
28 Apr 2026GSSold
9 Apr 2026ORLYSold
13 Mar 2026AMZNSold
24 Feb 2026SHOPSold
24 Feb 2026PLTRSold
24 Feb 2026CPNGSold
9 Jan 2026NFLXSold
9 Jan 2026MELISold
9 Jan 2026HOODSold
8 Dec 2025TMUSSold
8 Dec 2025METASold
8 Dec 2025DOCSSold
11 Nov 2025MCKSold
16 Oct 2025LRCXSold
16 Oct 2025ARMSold
24 Sept 2025IBMSold
26 Aug 2025PANWSold
15 Jul 2025LLYSold

Dated on the first trading day after the report was filed, when a follower could have acted.

Backtests are hypothetical and use today's listed companies only, which flatters results. Past performance does not predict future returns. This is research, not investment advice. How we backtest