Yellow Book
From Longman Business DictionaryYellow BookˌYellow ˈBook noun the Yellow BookFINANCE informal Admission of Securities to Listing, a book produced by the LONDON STOCK EXCHANGE containing the rules that companies must follow if they want their shares to be traded thereThe Stock Exchange is considering a change to its Yellow Book rules to enable young biotechnology companies to be floated (=have their shares sold) in London even if they are years away from making profits.