Tools

Replay any lazy portfolio through 5 years of monthly total returns. Shows the equity curve, CAGR, and max drawdown so you can size a portfolio's drawdown profile against your tolerance.

Compare holdings across up to six funds at once. Renders a pairwise heatmap and ranks pairs by holdings overlap — answers the open-ended questions /compare/ intentionally doesn't pre-render.

For any catalog fund, ranks every catalog candidate by holdings overlap and flags wash-sale risk where the candidate tracks the same index. Hides same-index funds by default.

Compounds the dollar difference between two expense ratios over a multi-decade holding period. The right framing for "is 3 bps vs 20 bps a big deal?"

Same allocation, three accounts. Pick a lazy portfolio + enter balances; see which fund belongs in taxable vs. tax-deferred vs. Roth, with rationale and estimated annual drag.

Four inputs, one stacked chart. Shows the ending balance and — more importantly — what share of it came from compounding versus what you actually contributed.

Standard amortization for mortgages, auto loans, and student debt. Monthly payment, total interest paid, and a balance curve so the early-year interest share is visible.