DurdenBTC · Systematic Investing · Survival Is Alpha

Invest systematically, like a quant fund.

DurdenBTC turns a disciplined, rules-based strategy into one simple daily readout: how much to hold in stocks, Bitcoin, Ethereum and gold — and when to move to cash before the worst drawdowns. Two backtested systems make the calls, so you’re following a process instead of your emotions or a group chat. Free updates on Substack; the full live portfolio is $7 a month.

Join on Substack — free, immediate updates to your inbox. Paid subscribers get the full live portfolio — allocations, signals, and both engines — for $7/mo.

Skin In The Game

I run my own money on this exact system.

No theory and no hindsight. The signals you see are the signals I trade — same rules, same discipline, same daily process. When the system says hold cash, I hold cash. The whole point is a repeatable method you can actually stick to, in the green and in the red.

Signals published every market day Every call timestamped — wins and losses 9 months live, paid tier 6 4,950 on X
The Model

One Basket. Two Engines.

One philosophy, one portfolio. Every position is sized by its risk, not by a round dollar amount — so a wild mover like Bitcoin and a calmer one like the S&P 500 are each set to nudge your portfolio by about the same amount. The Macro Regime Engine decides your stocks; the 8th Rule decides your Bitcoin, Ethereum and gold; anything sitting flat rolls to cash. Underneath it all: cut the big losses, and win on consistency rather than one lucky year.

The Systematic Basket
$100k → $513k since 2018
DurdenBTC systematic basket equity curve vs buy-and-hold, 2018 onward
Five holdings, two systems, each position sized by its risk. Bitcoin, Ethereum & Gold come from the 8th Rule; stocks (SPY & QQQ) from the Macro Regime Engine; cash when a holding goes flat. You only adjust when something drifts more than 2% — about weekly, not daily churn. The point isn’t the biggest number in a bull run; it’s a +21.5% a year carried with just a −10% worst drawdown.
+21.5% CAGR 2.04 Sharpe 2.13 Calmar −10% Max DD 0.27 Beta

Backtest since 2018 — a benign-regime sample, shown for transparency, not a promise. Calibrate to the floor: live expectations are Calmar ~1.0–1.5, drawdowns ~−10% to −15%.

The Two Engines — the proof behind the basket

Equities · SPY + QQQ
Macro Regime Engine (MRE)
MRE — 26-voter macro regime engine with regime shading and risk-on/off markers
It reads 26 economic signals — growth, inflation, interest rates and the dollar — and boils them into one call: risk-on, half-on, or out (100% / 50% / 0%). The same read works for the Nasdaq and the S&P, so it steers both SPY and QQQ. 23 years of backtest, seven live forward tests, zero blow-ups.
+11.37% CAGR 1.02 Sharpe 0.87 Calmar −13.09% Max DD
Full breakdown →
Bitcoin · Ethereum · Gold
The 8th Rule — one fixed rulebook
8th Rule trend ladder on Bitcoin — out / easing in / all in positioning
One fixed set of trend rules applied unchanged to Bitcoin, Ethereum and Gold — no tweaking per coin. A simple ladder: out (0%) / easing in (25%) / all in (100%). The bet: rules robust enough to work everywhere beat a stack of hand-tuned settings you can’t trust on new data — which is exactly why it holds up out-of-sample where over-fit models break.
BTC Calmar 1.50 ETH Calmar 1.03 Gold Calmar 0.34 one config all three
Full breakdown →

One rulebook, three assets. The same fixed 8th-Rule settings run on BTC, ETH and Gold — then each is sized by its own risk to decide how much the portfolio holds.

Foundation · The worldview underneath it all — the thesis: cut the big losses, size every position by its risk, and win on consistency.

Explore Free

Charts, Research & Macro Data

Live Bitcoin models, macro economic charts, and weekly research.. all free, no login required. Start with the Bitcoin Harmonic Oscillator for a one-glance read on where we are in the cycle, check where price sits versus its 200-day moving average, or see how Bitcoin tracks the ISM manufacturing cycle.

What You Get

Live Data. Real Edge.

Paid subscribers get a live members dashboard: the full systematic basket with today’s target allocation and rebalance flag, both systems (the Macro Regime Engine + the 8th Rule), and US sector reads.. refreshed daily before markets open. Screenshot below the cards.

Macro Regime Engine

Live regime classification (Goldilocks / Reflation / Inflation / Deflation), 26-voter breakdown, and current SPY & QQQ position size. The full backtest history and seven forward tests are one click away.

Live

8th Rule Trend Sleeves

Bitcoin, Ethereum and Gold, each run on the same fixed 8th-Rule ladder (out / easing in / all in), with a diagnostic chart and full backtest scorecard. Their signals become position sizes based on each asset’s risk.

Live

US Factor Bets — Sector Heatmap

A 3×3 grid covering all nine US sector ETFs (XLB, XLE, XLF, XLI, XLK, XLP, XLU, XLV, XLY). Each tile shows the engine’s current read; click a tile for the diagnostic chart.

Live

Macro Weather

SAAR momentum across Growth, Inflation, and Monetary Policy. Gives you a deeper understanding of what headwins & tailwinds are driving the current macro environment.

Live

Global Liquidity

Global M2 money supply vs Bitcoin with rate-of-change analysis across 21 economies in real time.

Live

Financial Stress

SOFR-EFFR, VIX, bond stress (MOVE proxy), and DXY strength. The four stress gauges that matter for sizing risk under the MRE.

Live
Sneak Peek

Members Only Access Preview

A sneak peak into the members only area where you have access to everything listed above.

DurdenBTC members-only dashboard preview — systematic basket allocation, Macro Regime Engine + 8th Rule, sector heatmap, liquidity, stress
All the data, charts, signals, backtests & more.. at your fingertips.
The Receipts

Signature Moments

The engine doesn't predict crashes. It measures the macro environment turning hostile — credit spreads widening, volatility spiking, safety assets bidding — and steps aside before the waterfall. Specific dates, not summaries.

FEB 20, 2020 · COVID

MRE went risk-off Feb 20. SPX fell −34% over the next month. Re-entered May 2020, into the recovery.

NOV 2021 · THE 2022 BEAR

Exited November 2021. SPX fell ~25% through the rate shock. Back in January 2023, early.

DEC 2007 · GFC

Exited December 2007. SPX fell −56%. Flat through the entire waterfall, re-entered April 2009.

SEP 2000 · DOT-COM

Exited September 2000. SPX fell ~49% over two years. Re-entered near the bottom, December 2002.

See the full crash-by-crash breakdown in the thesis →

How It Works

Three Steps

01

Subscribe Free

Join on Substack. Get signal updates, strategy deep-dives, and macro regime commentary delivered to your inbox.

02

Upgrade for $7/mo

Unlock the full live portfolio on one dashboard: today’s target allocation, both systems (the Macro Regime Engine for stocks, the 8th Rule for Bitcoin/Ethereum/Gold), the US sector heatmap, plus macro weather, liquidity and financial-stress gauges.

03

Execute

Use the regime signals and live data to size your risk. Full position when conditions are green, scale down when they're not.

Pricing

Free vs Paid

Everything runs through Substack. Free gets you in the door. Paid unlocks the full dashboard for the price of a coffee.

Free

$0/month
  • Strategy breakdowns & deep dives
  • Macro regime commentary
  • Members dashboard access
  • Live positioning & macro weather
  • Financial stress & liquidity charts
  • Live basket, both engines & US sector heatmap
Subscribe Free
Pillar Guides

Go Deeper

If you want to understand how the systems actually work — and the macro frameworks they sit inside — these long-form guides cover the full thesis. Each one stands alone; together they're the curriculum.

Start with a free subscription

Upgrade to paid anytime for $7/month to unlock the full dashboard.

Read the full thesis: Survival Is Alpha →