Enter tickers and weights and the page returns the book's current value against your cost basis, a weighted max drawdown figure from price history, a raw correlation matrix between your holdings, and a concentration reading. The weighted drawdown ignores diversification, so it overstates risk rather than flattering the book, and the correlation matrix is shown raw instead of being compressed into a single diversification score.
Tickers and weights live in the page address after the #, so a book is a copy-pasteable link and nothing about it is stored on our servers. The price you paid stays in your own browser and is never written into that link. No account is needed.
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Educational research only — not investment advice.