Lucas and Luna unpack the classic three-fund portfolio—total US stock, total international stock, total bond—and why this minimalist approach has consistently outperformed more complex strategies over the long term. They walk through the data: how a single diversified portfolio with just three holdings delivered roughly 8.5 percent annualized returns over the past two decades, while the average active fund manager lagged by nearly 2 percentage points per year. They also look at the hidden costs of complexity: higher fees, tax inefficiency, and behavioral mistakes from frequent trading. Along the way, they discuss a key 2022 study from Vanguard showing that adding more than three funds actually increases tracking error without improving returns. Lucas makes the case that simplicity is not just convenient—it's mathematically superior. Luna pushes back on whether the three-fund approach is too boring for the average investor, especially in a zero-commission trading world. The conversation also includes a brief, natural donation segment supporting the show's ad-free mission.