BEIJING - China's social security fund manager said Tuesday that its investment revenues hit 64.5 billion yuan ($10.2 billion), with a realized rate of return on investment of 4.38 percent, a three-year high.

The fund's managed assets topped 1 trillion yuan for the first time at the end of 2012, up 27.5 percent from a year earlier, according to statistics from the National Council for Social Security Fund, or?NCSSF.

In 2012, the fund received central fiscal capital totalling 52.6 billion yuan, up 9 percent from the previous year, the statistics showed.

The NCSSF said it also registered a healthy investment return on Guangdong's urban resident pension fund, which was worth 100 billion yuan in 2012. It did not offer hard data.

Founded in 2000, the fund is designed to serve as a solution for the country's aging problem, as well as a strategic reserve to support future social security expenditures.

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