Factbox: China's 2015 financial markets in numbers

As China's financial markets became more open to overseas investors in 2015, the year was characterized by a boom in new bonds, giddy stock market fluctuations and falling funding costs in the money market.

A summary of key market indices in 2015, released by the People's Bank of China on Monday, helps clarify the complex picture.

BONDS

-- Around 22.3 trillion yuan (3.4 trillion U.S. dollars) of bonds were issued, up 87.5 percent year on year. Of these, 21 trillion yuan went through the interbank market.

-- The central government issued 2 trillion yuan of treasury bonds.Local governments issued 3.8 trillion yuan.

-- China's three policy banks -- Agricultural Development Bank of China, China Development Bank, the Export-import Bank of China -- issued a total of 2.6 trillion yuan between them.

INTERBANK MARKET

-- Interbank transactions, including lending and borrowing, more than doubled, up 101.3 percent to 609 trillion yuan.

-- Weighted average interest rate of pledged repo transactions stood at 1.95 percent in December, down 154 basis points from a year ago.

-- The weighted average interbank offered rate was down by 152 basis points to 1.97 percent.

-- At the end of 2015, there were 9,642 institutions in the interbank market, up 49.2 percent.

-- China allowed 128 new overseas institutions, such as central banks and sovereign wealth funds, into the interbank market, bringing the total to 308.

STOCK MARKET VOLATILITY

-- The benchmark Shanghai Composite Index rose 9.41 percent to close the year at 3,539.18. The market experienced major fluctuations last year, with the peak at 5,178.19 and the bottom at 2,850.71. Endi