Wisconsin Statutes Insurance (Ch. 600 to 655) § 620.01. Purpose and scope

(a) Safety of principal, and to the extent consistent therewith, maximum yield and growth;

(b) Stability of value, except where higher risk and possible fluctuations of value are compensated by a commensurate increase in yield and growth possibilities, and either special reserves or surplus is available in sufficient amount to cover reasonably foreseeable fluctuations in value;

(c) Sufficient liquidity to avoid the necessity in reasonably expected circumstances for selling assets at undue sacrifice;

(d) Reasonable diversification with respect to geographical area, industry, maturity, types of investment, individual investments and other relevant variables;  and

(e) Reasonable relationship between liabilities and assets as to term and nature.