BEIJING — Overseas institutional investors have shown more interest in yuan-denominated assets as their trade in China's interbank bond market more than doubled in October, official data showed.

The aggregate trading volume of overseas institutional investors jumped by 211 percent to 542.5 billion yuan in October, with their net purchases amounting to 50.3 billion yuan, according to the China Foreign Exchange Trading System and the National Interbank Funding Center.

For the first 10 months, their total trading volume reached 4.23 trillion yuan, while their combined net purchases exceeded 870 billion yuan, more than the whole of last year.

A total of 2,345 overseas institutions had entered China's interbank bond market by the end of October, with more than 1,000 newly added from January to October. Last year, only 380 new overseas institutions joined in.

Analysts said the growing investment enthusiasm of overseas institutions mainly resulted from China's opening-up policies, the expanding spread in domestic and foreign interest rates and stronger yuan-appreciation expectations, according to the China Securities Journal.