District of Columbia Retirement Board committed $50 million to Quantum Energy Partners VIII.
The board disclosed the commitment to the oil and gas fund in July 20 meeting minutes posted on its website.
DCRB previously committed $25 million to Quantum Energy Partners VII in 2017 and $20 million to Quantum Energy Partners VI in 2014.
As of June 30, the board's actual allocation to natural resources was 2.2%; the target is 2%.
The board oversees the investment management of the District of Columbia Police Officers and Firefighters' Retirement Plan and the District of Columbia Teachers' Retirement Plan, which have a combined $10.8 billion in assets.
Board spokeswoman Lauren Smith referred questions to the minutes.
