Dow Jones has added MarketWatch to its Interest-Based Targeting (IBT) behavioral-ad network, reports AdWeek. The recently acquired MarketWatch would help fill out audience segments in areas like autos, said a Dow Jones spokesman. The acquisition helped build online ad inventory, and advertisers can now run campaigns tied to user behavior on all Dow Jones sites, including WSJ.com, Barron's and MarketWatch. Dow Jones uses Revenue Science's targeting software and offers six IBT areas, including business and personal technology, travel and auto.