Consumer loan companies Promise Co. and Sanyo Shinpan Finance Co. are in the final stages of negotiating to merge by the end of this year, a move that would make them the biggest firm in the industry, sources said Thursday. The loan companies are the nation's third- and fifth-biggest, respectively. The merger would give them 1.991 trillion yen in combined outstanding loans, surpassing the 1.985 trillion yen held by the current leader, Aiful Corp. This is the first merger move among the big consumer loan companies, which have been struggling because they are required to refund interest they had overcharged borrowers...According to the sources, Promise and Sanyo Shinpan, the operator of Pocket Bank outlets, decided the merger is necessary if they are to survive the tougher business environment in the near future...more...