Together with an ongoing campaign to revamp its stores and introduce more regional and in-house brands, the new initiatives should cost about 1.5 billion reais ($464 million) over the next four years, Walmart Brasil said.

Online marketplaces are an increasingly popular e-commerce format, in which websites offers products from third-party retailers, rather than just the company hosting the site.

(Reporting by Gram SlatteryEditing by Chizu Nomiyama)