March 5 (UPI) -- U.S. investment firm BlackRock announced it is purchasing most of a Chinese company's stake in two key ports on the Panama Canal. The Hong Kong-based CK Hutchison Holdings Limited announced Tuesday that it is selling 90% of its interests in the Panama Ports Company to the BlackRock consortium. PPC owns and operates the port of Balboa on the Pacific side and Cristobal on the Atlantic side. Advertisement The transaction also includes 80% of CK Hutchison's interests in 43 ports