The slippage follows two years of strong asset growth, with the funds also grappling with a rise in real interest rates, according to the report by OMFIF, Official Monetary and Financial Institutions Forum. OMFIF analysed data from the annual reports of the world's 50 largest public pension funds and 50 biggest sovereign funds. It also drew on surveys and contributions from 22 global public pension funds, including Singapore's GIC and Canada's CDPQ.