Article From: "Greg Ryan"   Read full article

If a company has an unlimited amount of a free product, how much could it give away in a month’s time?

For Fidelity Investments, the answer appears to be something approaching a billion dollars’ worth.

The Boston-based asset manager’s two free index funds, which debuted on Aug. 2, ended the month with a combined $988 million in net assets, according to Fidelity’s website. The ZERO Total Market Index Fund, which tracks a broad range of U.S. publicly traded companies, held $754 million in…