We align portfolios with people, not predictions.
Discipline Funds is an investment advisory firm founded on a straightforward idea: investing works best when it’s matched to real-world time horizons. Our Defined Duration approach focuses every decision on what matters most—your needs over time—so portfolios are simple, durable, and easier to stick with. We work with advisors, institutions and retail investors to help align financial processes and goals.
What We Do
Defined Duration InvestingAlign to Time
We map assets to specific time buckets (near-term, intermediate, long-term) so your portfolio stays anchored to when you actually need the money.
Simplify Decisions
Clarity reduces the temptation to over-trade. Our tools and ETFs promote consistent, rules-based decisions you can stick with.
Engineer Durability
By quantifying time and risk up front, we help investors manage drawdowns and sequence risk—before markets test resolve.
Our Approach
Process over PredictionThe future of financial planning is here. Asset-liability matching strategies used to be exclusive to large institutions. Through the Defined Duration methodology we're bringing ALM strategies to advisors and retail investors.
- Time Buckets: 0–3 years (liquidity & stability), 3–7 years (balance & preservation), 7–15 years (growth with resilience), 15+ years (long-horizon growth).
- Planning-based: Holistic financial planning is our core. We match financial plans with investment goals to achieve financial success.
- Quantitative process: HourglassFP and other software tools help quantify needs and map them to portfolio sleeves.
By the Numbers
We're growing!* Includes discretionary and non-discretionary AUM.
Our Story
From research to real-world toolsLeadership
People behind the processCullen founded Discipline Funds to help investors build portfolios that improve their lives through better alignment with real-world goals. His extensive experience with instutions and banks helped bring the Defined Duration asset-liability matching strategy to Main Street. In addition to being the Founder of the firm Cullen is a best-selling author and board member at Cambria Investments. But most importantly, he's a proud husband and father.
Erica is one of the countries foremost experts in the field of forensic accounting. As a certified fraud examiner she has a keen eye for detail and operational efficiencies. She helps oversee financial planning at the firm in addition to managing every day operations for the Discipline Funds team.