Digital asset firm Fineqia AG has partnered with cryptocurrency custodian Copper to provide a custody solution for its exchange-traded note (ETN) business, a move it says will increase the reliability and transparency of its products. Under the new agreement, Copper will protect the underlying assets held by Fineqia's ETNs, including the Fineqia FTSE Cardano Enhanced Yield ETN, which provides direct risk exposure to Cardano. As of January 29, the product managed more than $45 million in assets. About 10 months after FineqiaAG was initially approved, CardanoETN began trading on the Vienna Stock Exchange.