The People’s Bank of China (PBOC), the central bank, determines the daily midpoint for the yuan, also known as the renminbi (RMB). The PBOC utilises a managed floating exchange rate system where the yuan’s value can move within a given range, known as a “band”, around a central reference rate or “midpoint.”
This band is currently set at +/- 2%. The yuan’s previous closing rate was 7.1415.
The PBOC recently injected 212.6 billion yuan into the financial system through 7-day reverse repos at an interest rate of 1.40%. This action resulted in a net drainage of 203.5 billion yuan.
Policy Tightening Signal
The central bank’s net liquidity drain of 203.5 billion yuan is a clear signal of policy tightening. We see this as a deliberate move to increase the cost of shorting the yuan and discourage speculative bets against the currency. This action suggests the PBOC is committed to ensuring stability around the current levels.
This intervention comes as the US Dollar Index has been firm, recently trading around 106.5 amid continued hawkishness from the Federal Reserve. China’s own August 2025 trade data, which showed a surplus of $75 billion, was solid but not strong enough to independently boost the yuan against broad dollar strength. The PBOC is therefore stepping in to manage the exchange rate proactively.
For derivative traders, this heavy-handed guidance from the PBOC should lower expected volatility in the coming weeks. The central bank is effectively communicating a ceiling for the USD/CNY pair, making a sudden, sharp depreciation of the yuan unlikely. Implied volatility for one-month USD/CNH options has already compressed to 4.8% from 5.5% last week, reflecting this view.
Given this, we believe strategies that profit from range-bound price action are favorable. Selling out-of-the-money call options on USD/CNY to collect premium appears attractive, as the PBOC’s actions will likely cap the upside. This strategy bets that the exchange rate will not break significantly higher in the near term.
Previous Defensive Stance
We have seen this playbook before, looking back to the second half of 2023 when the PBOC aggressively defended the 7.30 level through similar liquidity management and strong daily fixings. That period also saw suppressed volatility and frustration for those betting on yuan weakness. The current actions suggest a repeat of that defensive stance.
Therefore, we will be closely watching the daily midpoint fixing from the PBOC each morning. If they consistently set the reference rate stronger than market expectations, it will reinforce their resolve. The key is to trade with the understanding that the central bank is actively managing the currency within a narrow portion of its official +/- 2% band.
