The People’s Bank of China (PBOC) sets the daily midpoint of the yuan, also known as renminbi, as part of a managed floating exchange rate system. This system allows the yuan to fluctuate within a range of +/- 2% around a central reference rate. Each day, the PBOC determines a midpoint for the yuan against a basket of currencies, mainly the US dollar, using market supply and demand, economic indicators, and international currency market trends.
The trading band permits the yuan to move within a 2% range around the midpoint in a single trading day. This range can be adjusted by the PBOC depending on economic conditions and policy aims. If the yuan’s value nears the limit of this trading band or experiences volatility, the PBOC may intervene by trading the yuan to stabilise its value. This intervention supports a controlled adjustment of the currency’s value to address excessive fluctuations.
Current Reference Rate Dynamics
Given the People’s Bank of China’s managed floating system, we see the expected reference rate of 7.1052 as a signal of continued currency management. The PBOC is setting the daily midpoint, which serves as the anchor for the yuan’s +/- 2% trading band. Traders should anticipate this managed approach to continue, especially in light of recent economic data.
We must consider the context of the wide interest rate gap between China and the US that has persisted through 2025. With the Federal Reserve holding rates around 4.5% and China’s rates remaining low to stimulate a sluggish economy, there is natural pressure on the yuan to weaken. The strong midpoint fixing is the PBOC’s primary tool to lean against this fundamental pressure.
This situation is reminiscent of the market dynamics we saw back in 2023, when a similar policy divergence led to sustained yuan weakness. Historical data from that period shows that the PBOC often set the fix significantly stronger than market expectations to prevent a disorderly decline. We expect this playbook to be used heavily in the coming weeks, especially after the disappointing 4.1% GDP growth figure for the second quarter of 2025.
For derivatives traders, this implies that implied volatility on USD/CNY options may remain suppressed in the short term due to the PBOC’s control. However, this creates a potential opportunity for long-volatility positions, such as buying straddles, betting on an eventual break if market pressure overwhelms the central bank’s efforts. The longer the fix resists market fundamentals, the greater the risk of a sharp, sudden adjustment.
Hedging and Speculation Strategies
We should also pay close attention to the forward market, as the cost of carry makes holding long yuan positions expensive. The forward points will continue to price in a depreciation of the yuan against the dollar, reflecting the interest rate differential. This makes selling CNY forward contracts a viable strategy to hedge or speculate on further weakness.
The daily trading band is now a critical indicator of market stress. In recent weeks, the spot rate has frequently tested the weak end of its 2% band, indicating that the market is consistently pushing for a weaker yuan than the PBOC desires. Any day the spot rate touches this limit signals that depreciation pressures are at their maximum for that session.
