Citigroup expects the US Treasury to cut $3 billion from each 20-year and 30-year bond auction and increase borrowing through short-term bills. Citi said the 20-year bond could even be canceled, with an announcement expected November 4. The Treasury has not confirmed any change. Bills currently cost less, but maturities within a year require more frequent refinancing at prevailing investor rates. BNP Paribas strategists doubt the shift would lower government borrowing costs. Bitcoin cooled when the 10-year Treasury yield reached its highest level since April 2002.