Quote from ToTrade:
How does one buy New Zealand treasury notes and bonds? Are they offered through local brokers like USA T-bills?
Been there, done that. Ok, you get paid a higher rate, but because its going to weaken their economy going forward, the NZ dollar is going to drop after its pop that you already missed, and so your gains from the high rate will get paid in cheaper NZ dollars, and so will the bonds when you get out. And if they rate the rates again while you own them, any gain from the currency pop is negated by the drp in value of the bonds.
Net effect? Gains you thought you'd get are lost, and you end up no better off than just leaving the money in a money market account here. The exception to that would be if there was a US dollar collapse, but not a NZ dollar collapse, in which case you would do well.