The yuan on Wednesday ended one notch weaker at 8.2765 per US dollar, still near the stronger end of its managed trading range. The one-year non-deliverable dollar forward discount versus the yuan stood at 4,025 points, implying a rate of 7.8755 yuan per dollar in 12 months' time.
NDFs are a transaction where a forward price is agreed between a customer and a bank, but settlement on the value date is undertaken entirely in US dollars.
One-year implied yuan volatility was at 5.8/6.6 percent.
Implied volatility is a measure of how much the options market expects the price of the underlying asset to move during the life of the option.
The yuan moves in a band of 8.2760 to 8.2800 enforced by the central bank.
Turnover, which amounted to a moderate $1.17 billion on Tuesday was not immediately available. The yuan strengthened to 7.5144 per 100 Japanese yen from 7.5366, and firmed against the euro to 9.9616 from 10.0271.
China's central bank will issue up to 20 billion yuan ($2.4 billion) in three-month bills on Thursday, unchanged from a week earlier.