BEIJING -- Bonds issued in China in the first 10 months of 2015 reached 17.2 trillion yuan ($2.7 trillion), up 72.8 percent from a year earlier, the central bank said on Wednesday.

Of the bonds issued, 16.3 trillion yuan's worth were issued through the inter-bank bond market, 67.8 percent more than in the first 10 months of 2014, according to the People's Bank of China (PBOC).

Bonds issued in October alone hit 2.1 trillion yuan, up 88.7 percent year-on-year but lower than 2.5 trillion yuan in September.

The surging bond issuance suggested a lighter financing burden on Chinese firms. Financing costs for companies through bond issuance has been significantly reduced since 2014, the PBOC said.