Haw. Rev. Stat. § 412:10-501: General requirement for investments.

(a) A credit union shall make investments that are consistent with prudent investment practices and in compliance with all applicable federal and state law.

(b) The board of directors of a credit union and any other person charged with the responsibility of investing the credit union's assets shall exercise such reasonable diligence, discretion, judgment, and intelligence as would be expected of a prudent investor. Among other things, they shall not engage in speculative or unsound investments, and they shall at all times consider the probable safety as well as the probable income of the capital being invested.

(c) The board of directors shall establish written investment policies.