Oklahoma Police Pension and Retirement System, Oklahoma City, returned 2.47% on investments in April, trailing its custom benchmark of 3.34%, according to the $1.77 billion plans website. Year-to-date returns were in the red, at -2.37% vs. -2.43% for the benchmark. Equity investments, including private equity, gained 3.48% in April vs. 5.08% for the custom equity benchmark. Fixed-income investments, including low-volatility strategies, returned 0.71% vs. the Lehman Brothers Universal indexs 0.1% for the month. Real assets advanced 1.33%, and cash lost 0.58%. Performance was hurt by below-benchmark returns from long/short equity and international equity managers; despite posting gains, those managers trailed their respective benchmarks by 200 basis points or more.