Traders Employ AI to Crack PBOC's Daily Yuan Fixing Code

A small group of traders is using artificial intelligence models to decode the People's Bank of China's opaque process for setting the daily yuan reference rate. Shanghai-based trader Ding Di's Gemini-powered AI tool, Xiao Long, nearly matched the central bank's fixing on March 4, 2026, computing the dollar-yuan rate at 6.9122, just two pips below the official 6.9124. Over the past four quarters, Xiao Long correctly predicted the fixing direction more than two-thirds of the time and was within 20 pips in over 40% of cases. The model detected a shift after the US-Iran war began, indicating the PBOC now places greater weight on the yuan's overnight moves, signaling less tolerance for further appreciation. A Singapore-based hedge fund trader using a similar AI tool reached comparable conclusions, suggesting the PBOC has reined in the managed currency since the war. While skepticism persists about drawing meaningful conclusions from the semi-transparent fixing, Di says continued tracking is improving accuracy despite occasional AI hallucinations, creating a "human-machine symbiosis."