CHEYENNE, Wyo. (AP) — The outcome of a ballot measure that would change the Wyoming Constitution to allow the investment of billions more in stocks remained too close to call late Tuesday.

Wyoming has about $20 billion in various funds. A "yes" vote Tuesday would have meant that roughly $6 billion of that total currently designated only for bonds could be invested at least partially in stocks.

Wyoming State Treasurer Mark Gordon had called for approving the measure because the state's faltering energy economy combined with low yields in the bond market made it important to have the flexibility to diversify investments.

Opponents of the change said they feared increasing risk for the state's portfolio.

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