Michigan Compiled Laws, Chapter 550. General Insurance Laws § 550.1206

Sec. 206. (1) The funds and property of a health care corporation shall be acquired, held, and disposed of only for the lawful purposes of the corporation and for the benefit of the subscribers of the corporation as a whole. A health care corporation shall only transact business, receive, collect, and disburse money, and acquire, hold, protect, and convey property, that is properly within the scope of the purposes of the corporation as specifically set forth in section 202(1)(d),  1 for the benefit of the subscribers of the corporation as a whole, and consistent with this act.

(2) The funds of a health care corporation shall be invested only in securities permitted by the laws of this state for the investments of assets of life insurance companies, as described in chapter 9 of the insurance code of 1956, 1956 PA 218, MCL 500.901 to 500.947.

(3) Without regard to the limitation in subsection (2), up to 2% of the assets of the health care corporation may be invested in venture-type investments. For purposes of calculating adequate and unimpaired surplus under section 204a,  2 a venture-type investment shall be carried on the books of a health care corporation at the original acquisition cost, and losses may only be realized as an offset against gains from venture-type investments. All venture-type investments under this subsection shall provide employment or capital investment primarily within this state. Each investment under this subsection is subject to prior approval by the board of directors. As used in this subsection, “venture-type investments” include:

(4) A health care corporation shall not market or transact, as defined in sections 402a and 402b of the insurance code of 1956, 1956 PA 218, MCL 500.402a and 500.402b, any type of insurance described in chapter 6 of the insurance code of 1956, 1956 PA 218, MCL 500.600 to 500.644. This subsection shall not be construed to prohibit the provision of prepaid health care benefits.