 OLDWICK, N.J.--BUSINESS WIRE--AM Best has assigned a Long-Term Issue Credit Rating Long-Term IR of bb to the 575 million, 4.875, perpetual, non-cumulative preferred stock issued by Athene Holding Ltd. Athene Bermuda NYSE:ATH. The outlook assigned to this Credit Rating rating is positive. Athene intends to use the proceeds for general corporate purposes, including support of investment opportunities, inorganic growth and organic and its commitment to the Athene Co-Invest Reinsur 