Contact Us

Use this form for questions about the data, corrections, and reports of broken pages. Include enough detail to identify the page or calculation you are asking about.

How messages are handled

Submitting this form saves your message for the site operator. The receipt will tell you whether an email notification was sent. A saved message does not guarantee a reply, and no response time is promised.

Reporting a Data Error

Corrections are the most useful messages we receive, and we would rather hear about a discrepancy than have it sit uncorrected. Every figure on this site is computed from the Kenneth R. French Data Library using the formulas published on our methodology page, which means any number here should be reproducible from the source files. If you cannot reproduce one, that is worth reporting.

To help us investigate quickly, please include the page you were viewing, the specific metric and date in question, the value you expected and the value shown, and the source you compared against. When we confirm an error we fix it and note the correction rather than changing figures silently.

What We Can and Cannot Help With

We are glad to answer questions about how a metric on this dashboard is calculated, what a particular factor measures, where the underlying data comes from, and how to reproduce a figure yourself. We also welcome suggestions for additional datasets, corrections to the educational articles, and reports of broken pages or display problems.

We cannot provide personalised investment advice, recommend specific securities or funds, review or manage your portfolio, or tell you what a current factor reading implies for your own decisions. This site is educational and informational only, and no advisory relationship is created by contacting us. Questions of that kind are best directed to a qualified professional who can consider your full circumstances.

Send us a Message

Your name, email address, subject, and message are stored to handle your inquiry. A hashed connection identifier is stored to limit repeated submissions. See our Privacy Policy.