Ind. Code § 27-1-40-1
As used in this chapter, "trusteed surplus" means the aggregate value of a United States branch's:
(2) trust assets described in section 4 of this chapter;
plus investment income accrued on the items described in subdivisions
As added by P.L.173-2007, SEC.20. Amended by P.L.3-2008, SEC.210.