The World Federation of Advertisers (WFA) has released a set of guidelines to help brands better tackle programmatic ad trading and combat transparency and arbitrage issues, unveiling Coca-Cola, Mastercard and Philips as members of its programmatic ‘taskforce’. Other members revealed to be part of the taskforce, which began unofficially last year, are Boehringer Ingelheim, Deutsche Telekom, GlaxoSmithKline and Johnson & Johnson.