Insights 
VT 
The People’s Bank of China (PBOC) has set the daily midpoint for the Chinese yuan at 7.1072 against the US dollar. This is above the estimated rate of 7.1281. The previous closing rate was 7.1304.
The PBOC employs a managed floating exchange rate allowing the yuan to fluctuate within a +/- 2% range around the central rate.
PBOC’s Injection
Additionally, the PBOC injected 182.7 billion yuan into the market through 7-day reverse repurchase agreements at an interest rate of 1.40%. With 288.4 billion yuan maturing today, this results in a net drain of 105.7 billion yuan.
The central bank has sent a very strong message today, September 1, 2025, by setting the yuan’s reference rate significantly stronger than anyone expected. This move is a clear signal that authorities will not tolerate excessive weakness in the currency. They are actively pushing back against the market, which had closed the yuan at a much weaker level previously.
At the same time, they drained a net 105.7 billion yuan from the financial system. This action makes holding yuan slightly more expensive, further discouraging bets against the currency. We see this two-pronged approach as a coordinated effort to firmly support the yuan.
This strong defense comes as the latest Caixin Manufacturing PMI for August 2025 dipped to 49.7, indicating slight contraction and adding to economic growth concerns. The firm guidance on the currency is likely intended to prevent capital outflows and maintain stability amidst this softer economic data. This is a pattern we should expect to continue as long as the data remains sluggish.
Implications for Derivative Traders
For derivative traders, this suggests that implied volatility on the USD/CNY pair is likely to fall in the coming weeks. The central bank’s actions create a strong ceiling for the dollar-yuan exchange rate, making large, sudden upward moves less probable. Selling out-of-the-money USD call options to collect premium appears to be a viable strategy, as the bank is essentially providing a backstop.
We have seen this playbook from authorities before, particularly during the economic slowdowns experienced back in 2023 and 2024. In those instances, consistent and strong yuan fixes successfully capped currency weakness for extended periods. This history reinforces the idea that betting against the central bank’s determination in the short term is a risky proposition.
