Matt Cardy/Getty Images A Danish energy company just issued debt with a maturity date of 3017. Danish energy company Orsted raised 500 million euros overnight via the hybrid bond. Hybrid bonds are so-named because they include features of both debt and equity. If you’ve been looking to invest for the long-term, this is the asset for you. Danish energy company Orsted raised 500 million euros overnight via the issue of a hybrid bond which doesn’t expire for 1,000 years. The offer was heavily oversubscribed, with the company receiving an order book of 2.4 billion euros. And the funds raised will be used in association with green energy projects, as Orsted transitions away from its traditional fields in oil & gas. Hybrid bonds are so-named because they include features of both debt and equity. One type of hybrid bond is known as a perpetual debt security, which has no fixed end-date for the repayment of principal.