Greg Coffey’s shop had a 28% gain last year.

Kirkoswald Asset Management will stop accepting new investors when the fund hits nearly $2 billion.

Reuters reports that the two-year-old fund will close itself to new investors at the end of March. Concerns about new capital impacting returns are the reason for the decision, according to the report.

The decision comes after Greg Coffey’s hedge fund had a 28% gain last year. That figure easily beat its benchmark of 6.16%. The fund opened in 2018 and returned 5.3% that year.

Kirkoswald Asset Management

The Australian Coffey – nicknamed “Wizard of Oz” – had previously retired at the age of 41 with a personal fortune of $665 million. He returned six years later and launched a new fund. The fund manager had worked under Louis Bacon, who announced plans to shut Moore Capital Management last year. Bacon described Coffey as the “most impressive trader” he had ever seen.

Coffey launched Kirkoswald Asset Management in April 2018 after raising $1 billion. In January, Financial News reported that the fund saw a 300% jump in fee income in the year up to March 31, 2019. The total for performance and management fees hit 2.8 million pounds.

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