(Yicai Global) Jan. 28 -- The People's Bank of China pulled out CNY150 billion (USD23.1 billion) from the country's financial system via open market operations today, following another withdrawal of CNY100 billion yesterday.

The central bank conducted CNY100 billion in seven-day reverse repos at an interest rate of 2.2 percent. Some CNY250 billion worth of previous short-term lending instruments matured.

The central bank has tightened up the banking system's liquidity for three straight days, with a total amount of CNY328 billion.

The Shanghai Interbank Offered Rate has continued rising this week amid the narrowing liquidity. The overnight SHIBOR rose 5.4 basis points to 3.0240 today, following another 24.4 bips hike yesterday.

Editor: Emmi Laine