China, which holds a fifth of its currency reserves in Fannie Mae and Freddie Mac debt, may cut the portion held in US dollars. [Asianewsphoto]

China, which holds a fifth of its currency reserves in Fannie Mae and Freddie Mac debt, may cut the portion held in US dollars, according to China International Capital Corp (CICC), one of the nation's biggest investment banks.

"The crisis has made Chinese officials realize it's a bad idea to put all their eggs in one basket," wrote Hong Kong-based Ha. "This will likely lead to greater diversification of foreign exchange reserve investments."

China held $447.5 billion of US agency bonds as of June 2008, according to the CICC calculations using disclosures by the US Treasury. It is likely to reduce the portion of reserves in dollar assets from the current 60 percent by purchasing more non-dollar assets with new reserves, he said.

Countries in Asia have stockpiled foreign exchange reserves since the 1997-98 financial crisis to act as a cushion against a run on their exchange rates. That in turn has increased pressure on policymakers to ensure higher returns from more than $4 trillion in assets.

China will expand its investments in corporate bonds and equities, according to Ha. Treasury and agency bonds account for 50 percent and 40 percent of total dollar assets held by the central bank, he wrote.