Verbose
Deity
It's -0,25% as of late. I.e. banks have to pay the National Bank interest to keep some of their money with it. Technically we as bank customers might be expected to pay the bank interest for keeping our money in a savings accont (they're not THAT big bastards though, the savings accounts just come with a zero interest rate these days).Negative interest rate?? Holy crap.. Why would they do that? Is the economy in such a dire shape? (I'm no economist, but generally over here when the economy goes to crap, the interest rates drop. I've never seen them go into the negative though.)
The reason for the negative interest rate is that it's set to stave of deflation. Sweden is at zero inflation as it is. Without the negative interest, deflation would start. And deflation is way worse than inflation (a bit of that is even wanted never mind what the Germans might tell anyone about the horrors of inflation).
The reason for the Swedish tendency towards deflation right now isn't super-clear for simplicity's sake it's to do with how BADLY the Eurozone is performing economically right now. Essentially the Swedish currency is internationally a small one. Even a modest uptick in international demand for it can get a big effect. That means a more expensive Swedish "krona", which guts Swedish export competitiveness (and Sweden is MASSIVELY export dependent), so a negative interest rate serves to push down demand for the "krona", to keep it low, while people look for someplace to put their money in uncertain times.
Otherwise the Swedish national accounts are in pretty good nick: 2,1% GDP growth in 2014, govt debt below 40% of GDP, a modest 1,3% budget deficit, unemployment at 7,8% not low, but for EU standards not high. GDP/capita at market prices is a 44 000 USD. So no, the economy is not in any particular trouble. The reverse more like. (It's a bit like with the Swiss, the dilemma is that if a small country does well when the Big Boys look a bit droopy, weird spill-over effects might occur. Though they're even more pronounced with the Swiss.)
The only bit that Sweden regularly gets rapped over the knuckles over is the extent to which household mortgages are increasing but that's actually demand-driven, since Sweden grows with about 100 000 people/year, and there's virtually no new housing being built, which means increased demand, and jacked up prices. Exactly why the Swedish real-estate production is so low is again too complex to broach easily there's a ton of lock-in effects, very exacting building standards, and a tendency when building to build exclusively to a very financially strong segment of the market, not the mass of ordinary income people in need of a place to live.
Of course negative interest rates and historically low mortgage costs just adds fuel to the real-estate fire as things stand. It's why I can pay a mere 300 USD/month to service my debt. Four times that amount tends to be quoted as the more "normal" rate everyone should eventually be preparing for (so 1200). (Though this negative interest rate is expected to last until late 2016 at least.)