NextCard Inc., the Internet-oriented credit card company, has begun publishing a monthly ranking of Web merchants based on the transaction patterns of 100,000 NextCard Visa cardholders.

The first "NextCard e-Commerce Index," based on July activity, listed America Online, Amazon.com, Onsale, Buy.com, and CD Now/Music Boulevard as the top sites.

NextCard is publishing the index on its Web site and says it will also be carried by Yahoo Internet Life and The Industry Standard. "We developed the NextCard e-commerce index to provide accurate and reliable information about where on-line consumers actually purchase on the Internet," said Dan Springer, chief marketing officer.

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