The People's Bank of China (PBOC), China's central bank, is responsible for setting the daily midpoint of the yuan (also known as renminbi or RMB). The PBOC follows a managed floating exchange rate system that allows the value of the yuan to fluctuate within a certain range, called a "band," around a central reference rate, or "midpoint." It's currently at +/- 2%.Previous close was 7.1870 PBOC injected 161.2bn yuan via 7-day reverse repos at 1.40% 202.5bn yuan mature todaynet drain is 41.3bn yuan This article was written by Eamonn Sheridan at www.forexlive.com.