A wrong figure
This is the message we most want. Send the page URL, the figure, and what you believe it should be — ideally with the filing or source. Every published figure links to the filing it was computed from, so a disagreement can usually be settled by both of us reading the same document. When a correction lands, the page is updated with a dated note; when the error was systematic, it is written up in an article.
A fund or a pair that is missing
Name the ticker. If the fund files Form N-PORT, it can be measured; the site covers most US-listed funds above $500 million and the list grows monthly. Pairs are added when there is a reason to compare them.
Reuse, citation, machine access
Data is CC BY 4.0 — no permission needed, attribution to the canonical URL. For programmatic access see the API catalogue and the MCP endpoint; no key, no sign-up.
What we do not do
Personal investment advice, paid placements, sponsored coverage, affiliate arrangements, or comment on whether to hold a particular fund. Messages asking for those will not get a reply.