The cut in foreign exchange reserve ratios is expected to lend the tightly managed currency some support, by freeing up dollars banks need to maintain with the central bank.
The yuan has fallen furiously, shedding more than 3% against the dollar in the past month and hitting a one-year low of 6.5775 on Monday, on concerns over a worsening economic growth outlook caused by strict COVID-19 lockdowns in Shanghai and major cities and the loss of a yield advantage versus the dollar.
Marco Sun, chief financial market analyst at MUFG Bank, said recent sharp losses in the yuan have de-coupled from China's economic fundamentals and prompted the authorities to roll out measures to prevent it from falling further.