The People's Bank of China is adding in the sale of yuan denominated bills to its schedule

  • Will auction CNH bills in Hong Kong
  • Later in June

This is an effort from the PBOC to support the yuan (to the extent it'll boost yields, prove attractive to investors/traders, and sop up some liquidity)

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Over the weekend US Treasury Secretary Mnuchin accused China of allowing the yuan to slide. Maybe someone at the PBOC listened to him?