Backtest copying a member of Congress

Pick a politician and see what would have happened if you had bought and sold the same stocks a few days after each filing became public. The simulation only uses information that was public at that moment.

Politician Start Choosing a politician fills in the date of their first purchase filing. End Initial investment ($) Monthly deposit ($) Delay after filing (days) Copy sales too

Katie Britt: 2026-01-01 to 2026-11-10

$10,000 invested became $10,883 by copying Katie Britt, against $10,799 in the S&P 500: 0.8 percentage points ahead of the index.

+8.8%copy portfolio return

+8.0%S&P 500 return

-4.1%worst drop

13trades executed

On average 52% of the money was invested. On the 198 days stocks were held, the copied holdings returned +19.2% a year against +8.4% for the S&P 500 over the same days.

Portfolio value (teal) and the same deposits in SPY (red). Green dots are copied purchases and red dots copied sales (at most 300 are drawn). Returns are time-weighted, so deposits do not count as gains.

Gain or loss by month

Monthly return of the whole portfolio, cash included. Green months gained, red months lost; darker means a bigger move.

Copied trades by month

Buys and sells the simulation executed each month; darker means more.

Biggest winners and losers

Best positions	Profit
UNH	$181
AAPL	$165
EOG	$159

Worst positions	Profit
GOOG	$-82
NVDA	$-11
JPM	$3

What was left out

6 copy orders were not placed (no price history, no cash left, or the 20-position limit).
3 disclosed lines could not be copied: 2 unsupported asset type; 1 executes before the backtest start.

The latest disclosure is dated 2026-11-05. Trades filed after that date are not in the dataset yet.

AAPL: no price bar on 2 trading day(s) while held; valued at the last close.

AMZN: no price bar on 2 trading day(s) while held; valued at the last close.

EOG: no price bar on 2 trading day(s) while held; valued at the last close.

GOOG: no price bar on 2 trading day(s) while held; valued at the last close.

MSFT: no price bar on 2 trading day(s) while held; valued at the last close.

NVDA: no price bar on 2 trading day(s) while held; valued at the last close.

UNH: no price bar on 2 trading day(s) while held; valued at the last close.

UPS: no price bar on 2 trading day(s) while held; valued at the last close.

V: no price bar on 2 trading day(s) while held; valued at the last close.

WMT: no price bar on 2 trading day(s) while held; valued at the last close.

XOM: no price bar on 2 trading day(s) while held; valued at the last close.

6 copy order(s) were rejected; see the transaction log for each reason.

3 disclosed trade(s) were excluded: 2 unsupported asset type; 1 executes before the backtest start.

Hypothetical result with a 3-day delay, 5 basis points slippage, no fees and no leverage. See the methodology. Not investment advice.