U.S. bank State Street said it has terminated its partnership with cryptocurrency custody firm Copper, CoinDesk reported. Both companies will continue to build out their digital strategies in their respective approaches to product development. State Street will continue to work on “multifaceted solutions for tokenized securities and native tokens.” Yesterday, Copper announced it was ditching its enterprise business, the company's software and infrastructure development arm. The reason, the sources said, is that Copper's Clear Loop custody and settlement business makes more economic sense going forward.