How does yahoo finance construct its industry indexes? Are they equally-weighted or market cap-weighted?

The indexes I refer to can be found by clicking on the industry link found in the business summary portion of a given stock's page, followed by the second link in the Intraday performance summary section of the resulting page. As one example, for Home Depot (ticker: HD), the ultimate link to the Home Improvement index is http://finance.yahoo.com/q?s=%5EYHOh841

Public Comments

1. im sry but i dont know
2. Typically most indexes are market cap weighted.