Sweden's central bank has followed other major countries and further reduced its interest rate -- making it even more negative. With negative interest rates, banks that store money with the central bank must pay to do so (rather than earning interest as would normally be the case). The goal is to induce banks to hold less money (thereby lending more and increasing economic activity). See article here, The Telegraph.
Dolvin, Steven D., "Negative Interest Rates" (2016). All Chapters. 155.