Unlock the Editor’s Digest for freeRoula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.9fin, a fast-growing information provider to corporate credit investors, has raised $50mn in financing as it battles for dominance in the market for debt research.Highland Europe, a prominent growth capital investor, is to lead the 9fin series B round that is to be formally announced on Monday. The parties did not disclose the implied 9fin valuation but the Financial Times h...