Hm, interesting. The following article seems to explain the mechanics of it and hints at some of the possible reasons:
http://macroblog.typepad.com/macroblog/2008/09/thursdays-post.html
From what I can tell, those New Zealand banks that need US dollars would ordinarily be able to borrow these from some foreign bank directly… but in present market conditions the banks that would ordinarily do that kind of lending (big US banks, I’m guessing) aren’t budging. The Fed has tried dishing out money to those banks but they just keep sitting on it, or will only lend it out at prices which are prohibitively high.
So because the Fed isn’t happy with the market price of borrowing US dollars, it’s decided to take out these middle men and start dishing US dollars out to the banks of foreign nations directly. So it doesn’t appear to be a bail out of the New Zealand banks, as such.
Why would the New Zealand banks need US dollars? Surely they’d need them to lend to New Zealand customers that had to purchase goods and services in US dollars right? Without access to US dollars, lots of goods and services that the New Zealanders previously sourced from the US would have to be sourced elsewhere or simply not had at all… which probably wouldn’t be to swell for US businesses. Perhaps they would react by starting to accept currencies other than US dollars - after all it would be either that or go under, for the big exporters.
Looking at the flip side, often New Zealand businesses wanting to sell goods and services into the US will need to make contracts in US dollars (since that’s all the US companies will deal in). If they’re going to sell wine to a big super market chain in the US for example, they have to say OK we’ll give you X thousand cases of wine in June for Y USD a bottle. However, if they sign that contract now they’re taking a risk on the exchange rate between the US and the NZ dollar - which is probably not a risk they’re interested in taking (these guys are Wineries, not currency speculators). As such, in order to be able to strike that deal they’re going to need to purchase US dollars immediately in order to hedge their wine contract. That way if the currency shifts against them, they make it back on the US dollars they purchased - so they can be assured of a fixed price, in June, in NZ dollars despite the fact that the contract will be signed in USD. Once again, without access to US dollars these kinds of deals would not be struck and so New Zealand companies would probably sell less to the US if they couldn’t get hold of US dollars.
So either way you look at it, if the Libor is high then lots of deals aren’t going to get done.
What I’m wondering is whether these deals are actualy economical or not in the first place, in view of the fact that the Libor is high. Ordinarily I’d think that a high interest rate was high for a good reason and trying to contourne that fact would probably not be a good idea. However in this case I think the reason the interest rates are high is because money is evaporating from the economy (and particularly from the banking sector) on a daily basis as banks write of more and more debts that they’ve been keeping in their closet. If the US actually had a sound monetary system (for example a gold standard with banks maintaining 100% reserves) then such a situation wouldn’t be possible in the first place. So perhaps what you have is the Fed licking self inflicted wounds. I haven’t really thought this one out though so I’m not sure if that’s true or not.