opinion: PER CURIAM:
  Rocky Mountain Fire & Casualty Company appeals from the district court’s dismissal of its diversity action against Dairyland Insurance Company. The district court determined that Rocky Mountain had failed to state a claim recognized by Arizona law. We affirm.
  Hugh Tillery wrecked an automobile owned by Buck Cook. An injured passenger sued Tillery. Dairyland had insured the automobile, and was the primary carrier. Rocky Mountain had issued a policy to Tillery, and was liable for damages in excess of the ten thousand dollar limits of Cook’s policy.
  After a jury gave the injured passenger a $12,500 verdict, Dairyland moved for a new trial. The plaintiff offered to settle for $12,000. Rocky Mountain agreed to contribute $2,000 toward the $12,000 sum, but Dairyland refused to settle. The second trial ended with a jury award of $21,500. Dairyland paid to its $10,000 limit; Rocky Mountain paid the remaining $11,500.
  Rocky Mountain then commenced this action against Dairyland, seeking damages on the theories that (1) Dairyland owed a duty of good faith to the excess insurer and breached that duty by refusing to offer to pay its policy limits in settlement, and (2) Rocky Mountain, as subrogee of Tillery’s rights, can recover for Dairyland’s alleged breach of its duty to Tillery to negotiate in good faith.
  The opinion of the Arizona Supreme Court in Universal Underwriters Insurance Co. v. Dairyland Mutual Insurance Co., 102 Ariz. 518, 433 P.2d 966 (1968), fairly read, rejects both contentions. A federal court exercising diversity jurisdiction is bound to follow the considered dicta as well as the holdings of state court decisions. United States Fidelity & Guaranty Co. v. Anderson Construction Co., 260 F.2d 172, 176 (9th Cir. 1958).
  Affirmed.
instruction: What follows is an opinion from a United States Court of Appeals.
  Intervenors who participated as parties at the courts of appeals should be counted as either appellants or respondents when it can be determined whose position they supported. For example, if there were two plaintiffs who lost in district court, appealed, and were joined by four intervenors who also asked the court of appeals to reverse the district court, the number of appellants should be coded as six.
  When coding the detailed nature of participants, use your personal knowledge about the participants, if you are completely confident of the accuracy of your knowledge, even if the specific information is not in the opinion. For example, if "IBM" is listed as the appellant it could be classified as "clearly national or international in scope" even if the opinion did not indicate the scope of the business. 
  
  Your task concerns the first listed appellant. The nature of this litigant falls into the category "private business (including criminal enterprises)", specifically "financial institution". Your task is to determine what subcategory of business best describes this litigant.
choices: bank insurance savings and loan credit union other pension fund other financial institution or investment company unclear