OTC Markets Group Inc has welcomed Warpaint London PLC (AIM:W7L)’s upgrade to the OTCQX Best Market from the Pink Market, effective immediately. This move aims to provide transparent trading options for US investors. Warpaint boss Sam Bazini said: “This new US trading facility comes on the back of an already increased level of interest in Warpaint from US investors given the progress the company is making with significant retailers in the US”.