The EUR/SEK currency pair (i.e., the euro expressed in terms of the Swedish krona) is a more "exotic" currency pair. Specifically, trading volumes are thinner in the Swedish krona relative to major currencies like the euro or U.S. dollar.
The Swedish krona tends to correlate with the other Nordic currencies (the Danish krone and Norwegian krone), yet its relative value still significantly depends on the monetary policy of Sweden. The Swedish krona is also viewed as another safe-haven currency, besides the Japanese yen and Swiss franc, meaning that it is more likely to strengthen in