Is it not the case that while the Swedish Crown is not officially pegged to the Euro in the same way that the Danish Krone is, it's value is heavily influenced by the Euro? The Euro's decline in value is down to investors moving their money to safer shores in the anticipation of energy shortages in Europe in the coming months.
Matching a change of government that's unproven. Having SD in power has no historical precedence so there's a definite lack of confidence in what the new government can achieve.