China's treasury debt holdings in the US grew by US$14.3 billion in December amidst speculation that it was seeking other options to deploy its nearly US$1.95 trillion in foreign exchange reserves.

The nation's holdings of the treasuries totaled US$696.2 billion in December, up from US$681.9 billion in November 2008, the US Treasury international capital flow report released yesterday showed.

The rise in treasury debt has triggered concerns that the country's continual pile-up of US debt would lead to investment losses if treasury prices tumble in future.

China has accelerated its holdings of treasury debt since August 2008, when holdings grew by US$23.7 billion month-on-month. By September, it had replaced Japan as the primary holder of these debt instruments.

Analysts said since the treasuries are relatively stable in value compared to other financial products, China has apparently aimed to play safe by buying up these US bonds.

However, now that China's holdings of treasuries account for one-third of its foreign exchange reserves, some warned that "putting all eggs in one basket" is risky.

"China needs to diversify its foreign exchange reserves basket," said Zhang Ming, economist with the Institute of Finance and Banking at the Chinese Academy of Social Sciences. "Its holdings of these treasuries face the danger of a price drop as the US is expected to issue more bonds to stimulate its economy," he told China Daily.

With US interest rates at near-zero levels, the dollar's value may slide, and its recent strong rally may not sustain, economists said. The sliding dollar will push down treasury debt prices, economists said.