- Central Bank worried about currency getting too strong (as euro weakens and investors seek higher returns).
- So have made (by announcement) policy interest rates more negative (i.e. depositors need to PAY to have their money in banks) hence making krona less attractive for foreign investors.
- Central bank also expanding its bond buying program (QE), i.e. aggressively buying krona-denominated bonds from the market (this results in a flood of krona into the market, hence if anyone wants to own krona, there are plenty available - this is an effective form of currency intervention, but without the Central Bank actually having to be active in the FX market).