AXA Investment Managers is acquiring a US advisory firm in a bid to expand in the global debt market. : AXA Investment Managers is acquiring a US advisory firm in a bid to expand in the global debt market. AXA Investment Managers' Real Assets arm, which has €77 billion ($121bn) of in assets under management, is acquiring Quadrant Real Estate Advisors, an Atlanta-based firm that provides specialist debt advisory services. Quadrant has an investment team that manages $9.4 billion of US commercial real estate loan mandates.