Mont. Code Ann. § 33-2-413

33-2-413 . Interest rates -- determination of minimum standard valuation. (1) For policies issued prior to the operative date of the valuation manual, the calendar year statutory valuation interest rates as established in this section must be used in determining the minimum standard for the valuation of:

(a) all life insurance policies issued in a particular calendar year on or after January 1, 1989;

(b) all individual annuity and pure endowment contracts issued in a particular calendar year on or after January 1, 1984;

(c) all annuities and pure endowments purchased in a particular calendar year on or after January 1, 1984, under group annuity and pure endowment contracts; and

(d) the net increase, if any, in a particular calendar year after January 1, 1984, in amounts held under guaranteed interest contracts.

(2) Except as provided in subsection (3), the calendar year statutory valuation interest rates are determined as follows and the results rounded to the nearer 1/4 of 1%, when R 1 is the lesser of R and .09, R 2 is the greater of R and .09, R is the reference interest rate established in 33-2-415 , and W is the weighting factor established in 33-2-414 :

(a) for life insurance:

Interest rate = .03 + W(R 1 - .03) + (W/2)(R 2 - .09);

(b) for single-premium immediate annuities and for annuity benefits involving life contingencies arising from other annuities with cash settlement options and from guaranteed interest contracts with cash settlement options:

Interest rate = .03 + W(R - .03);

(c) for other annuities with:

(i) cash settlement options and guaranteed interest contracts with cash settlement options, valued on an issue year basis, except as stated in subsection (2)(b), the formula for life insurance stated in subsection (2)(a) applies to annuities and guaranteed interest contracts with guarantee durations in excess of 10 years and the formula for single-premium immediate annuities stated in subsection (2)(b) applies to annuities and guaranteed interest contracts with guarantee durations of 10 years or less;

(ii) no cash settlement options and for guaranteed interest contracts with no cash settlement options, the formula for single-premium immediate annuities stated in subsection (2)(b) applies; and

(iii) cash settlement options and guaranteed interest contracts with cash settlement options valued on a change-in-fund basis, the formula for single-premium immediate annuities stated in subsection (2)(b) applies.

(3) If the calendar year statutory valuation interest rate for any life insurance policies issued in any calendar year differs from the corresponding actual rate for similar policies issued in the immediately preceding calendar year by less than 1/2 of 1%, the calendar year statutory valuation interest rate for such life insurance policies is equal to the corresponding actual rate for the immediately preceding calendar year. For purposes of this subsection, the calendar year statutory valuation interest rate for life insurance policies issued in a calendar year must be determined for 1980 (using the reference interest rate defined for 1979) and must be determined for each subsequent calendar year regardless of when 33-20-208 becomes operative.