Publicis to buy Microsoft's Razorfish for $530MNEW YORK —French advertising company Publicis Groupe SA has agreed to buy Microsoft Corp.'s digital advertising firm Razorfish in a move to boost its share of advertising on the Web, according to a joint statement released Sunday.

Publicis to buy Microsoft's RazorfishNEW YORK —French advertising company Publicis Groupe SA has agreed to buy Microsoft Corp.'s digital advertising firm Razorfish as part of an effort to boost its share of advertising on the Web, according to a joint statement released Sunday.