China's FX reserve ratio hikes (2021)
As the yuan strengthened through 2021, the People's Bank of China raised the foreign exchange reserve requirement ratio twice, reaching 9% in December. The tool forced banks to park more dollars with the central bank, tightening dollar supply onshore.
The yuan kept appreciating into early 2022 before Federal Reserve rate hikes and a strong dollar reversed the trend.
The episode established the reserve ratio as a two-way smoothing tool rather than a level-setting instrument.
The 2026 hike is the first increase since then, and it is being used for the same reason: to slow a fast appreciation, not to end it.
