CHEYENNE, Wyo. (AP) — Wyoming State Treasurer Mark Gordon says the 2015 fiscal year marked one of the best years for state investments, but that the calendar year was a different story.

Gordon says during the fiscal year, which ended June 30, Wyoming brought in more than $1 billion in investment income. But in the 2015 calendar year, he says the downturn in energy and a slowdown in global markets had its impact on the state.

Gordon says his office is working to make sure the $20 billion divided between state and permanent funds can produce money to help the state remain financially stable.

He says he's confident Wyoming's investments will continue to be successful, despite the slowing global economy.