About the Author

Eric Lanz

Engineer • Portfolio Experimenter • Builder

I'm a software engineer at Apple with a passion for building systems that solve complex problems. OppenFolio is my personal experiment in applying engineering principles—automation, data analysis, and systematic decision-making—to high-yield ETF investing.

Background

My background is in software engineering, not finance. I don't have any professional financial credentials, nor am I a registered investment advisor. What I bring to this project is a technical mindset: hypothesis-driven testing, transparent data collection, and rigorous analysis.

OppenFolio started as a question: Can automation and real-time management extract more income from high-yield assets than is lost to NAV decay? Rather than backtest on historical data, I decided to test this hypothesis with real capital and share the results publicly.

My Approach

This project reflects my engineering background:

What This Is NOT

I am not a financial advisor. OppenFolio is my personal portfolio experiment, shared publicly for educational purposes. Nothing on this site constitutes financial advice or investment recommendations. I am learning as I go, testing hypotheses with real money, and documenting the results—both successes and failures.

If you're considering any investment decisions, please consult with a qualified financial professional. My goal is to share data and methodology, not to tell anyone what to do with their money.

Why Share This Publicly?

Three reasons:

  1. Accountability: Public tracking keeps the experiment honest. No retroactive adjustments, no hiding losses.
  2. Learning in Public: Sharing the process helps me think more clearly and invites feedback from others exploring similar strategies.
  3. Contribution: If this data helps someone else understand high-yield ETFs better, or inspires someone to build their own system, that's valuable.

Get in Touch

I'm always interested in hearing from fellow builders, skeptics, and yield-seekers. If you have questions, feedback, or want to discuss the methodology, feel free to reach out.

📧 Email: [email protected]
💼 LinkedIn: linkedin.com/in/ericlanz