Norway’s massive sovereign wealth fund isn’t immune from the market volatility that has roiled investors around the world this year. The fund reported today that it lost 1.5% in the first three months of the year, its worst quarterly decline since the third quarter of 2015. It also broke a seven-quarter streak of positive returns.

This sent the value of the fund down by 171 billion kroner ($21 billion), or more once currency fluctuations and withdrawals by the government are factored in. This is quite the turnaround from 2017, when the fund’s value increased by the most in its 20-year history.

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