# Investment Practice

*Last reviewed May 2026*

This page describes elements of my personal investment practice that operate alongside the [North American Fortress](https://justinhammack.com/methodology/north-american-fortress.md) macro framework. It is descriptive of my own practice. It is not investment advice and is not directed at any individual circumstance. Anyone applying anything described here is doing so at their own risk and on their own judgment.

## Multi-State Tax Domicile Architecture

I operate across multiple states with Washington as the established domicile, supplemented by working presence in California and Nevada. The structure is treated as architecture, not paperwork: documented behaviors, registered relationships, and recorded decisions that produce a clean residency posture and survive scrutiny.

The architecture is built around a 19-factor residency framework that maps how state revenue agencies — particularly California's Franchise Tax Board — evaluate domicile claims. Day counts are necessary but not sufficient; the substantive factors are where business interests sit, where banking and brokerage relationships originate, where professional advisors are located, where vehicles are based, and where the operator's daily life materially happens.

The practice extends to entity domicile decisions for the operating businesses, vehicle registration discipline across multiple residences, and a multi-node mail and freight system that preserves the documentary record. The architecture is reviewed annually against current residency law and adjusted as state revenue agencies evolve their enforcement priorities.

The reason it is treated as architecture is that residency is not a paper status — it is a pattern of life. The architecture is the deliberate shaping of that pattern so that when the pattern is examined, it makes a coherent case for itself.

## Algorithmic Cryptocurrency Microstructure Trading

I run a custom algorithmic trading system for select cryptocurrency positions. The system is hosted on Oracle Cloud Infrastructure, executes via the Coinbase Advanced Trade WebSocket API, and is version-controlled in GitLab to allow rapid parameter rollbacks during high-volatility periods.

The trading practice focuses on order book microstructure rather than directional macro views. The signals of interest are TWAP and VWAP execution signatures, level-2 depth dynamics, and the reflexive interactions between corporate buyers and retail flow in low-float environments. Positions are sized for active participation rather than passive holding, with explicit exit timelines tied to known catalyst windows — warrant unlocks, supply unlocks, governance events — rather than price targets alone.

The work is documented for my own discipline, version-controlled for my own auditability, and not licensed, syndicated, or advised on. It is a personal practice, not a service.

## Why This Page Exists

These two practice areas are distinct from the [North American Fortress](https://justinhammack.com/methodology/north-american-fortress.md) framework but operate in parallel with it. The Fortress governs strategic allocation across regimes. This page documents two specific practices — domicile architecture and algorithmic crypto execution — that are personal disciplines rather than parts of the framework.

Both are subject to revision. Multi-state residency law evolves; market microstructure evolves; the practices evolve with them. The page is dated for that reason.

## Related

- [North American Fortress](https://justinhammack.com/methodology/north-american-fortress.md) — the macro framework these practices operate alongside.
- [Strategic Refusal](https://justinhammack.com/methodology/strategic-refusal.md) — the operating discipline that includes pre-revenue bootstrap and capital-structure decisions.