Alternative trading system Openfinance is adding PRTS to its platform. : Openfinance, a regulated platform for digital asset trading, has added hedge fund Protos to its platform. This is the one of the first crypto hedge funds to be traded on an alternative trading system (ATS). The token will trade under the symbol PRTS. Openfinance, according to the company, “is the first U.S.-regulated digital security trading platform built for alternative assets.” The company tracks multiple digital assets and is available to qualified US investors and verified non-US investors. These investors will be able to access Protos on the platform.