Spare Change Capital

A one-person quant research desk that proves what doesn't work and ships the few things that do. — paper bots, ~108 tested-and-buried ideas, one real-money plan — all optimized for return per drawdown.

—
Paper money · 6 bots
—
Total P&L · since each bot's launch
—
Paper bots running
—
Ideas tested & buried
Daily P&L · all paper bots
—
Total P&L (running)Up dayDown day
Line = total profit across the 6 paper bots since each one launched (ends at the P&L tile). Bars = that day's gain or loss. Hover for each bot's share. Paper money only — the real accounts are on the Real Money tab.

Flagships

All bots · click any to open its page

Backtests use each bot’s own history — spans vary from ~7¾ years (The Ark, 2019–26, incl. margin interest) to 16 years (Athena), and HOUSE v2.9 shows its 2015–26 after-tax backtest (the paper account itself started with $100k on Jan 2, 2026). Not directly comparable. The big number on each card puts every bot on one time frame: its rules replayed from $100,000 on Jan 2, 2026 to the latest close, before tax . The small line is each bot’s live paper account since its own launch.

BOCA conviction · what we'd fund first, and why

① Core — fund firstHOUSE v2.9The ArkVanguard
② Satellites — size smallGringottsSpare Change
③ SpecialAthena · fun moneyOracle · cross-check

Ranked by return-per-drawdown, robustness, and honest diversification — not raw return. The four voices don’t fully agree (Bill ranks Athena last; Athena ranks it near the top). See the full ranked reasoning + each voice’s dissent →

Explore the desk

🗺️

The Map

Every bot, edge, and buried idea as a 3D force-directed graph — see how the whole desk connects.

📈

Track Record

The desk's history and running results — what shipped, what died, and how the live book is doing.

🔎

Full Detail

Per-bot detail view with positions, trades, and the underlying account metrics.

The creed

Prove what doesn't work. Return is #1, drawdown is #2. Every strategy is tested survivorship-free, in- and out-of-sample, with no lookahead — most get buried, the survivors get deployed. The whole desk is watched by the HOUSE health bot (every 10 min), the Jasper security watchdog and a dead-man alert, and argued over by the BOCA council.

Spare Change Capital · paper trading desk on DigitalOcean · dashboards auto-refresh every 15 min
Not investment advice. Research and paper results only.