That was the Z$100 trillion note. The Reserve Bank of Zimbabwe introduced the Z$100 trillion note on 16 January 2009, roughly two months later. What the central bank thought it was doingThe logic behind ever-bigger notes is simple, and it is also the trap. When the central bank offered to buy the notes back in 2015, it valued a Z$100 trillion note at 40 US cents. The market found a use for the Z$100 trillion note only once it stopped pretending to be money.