The krona weakened despite Tuesday's decision by the Swedish central bank (Riksbank) to raise its main policy rate by 100 basis points to 1.75 percent.
However, on Wednesday the U.S. Federal Reserve announced its third consecutive 0.75 percent rate hike.
The latest raise in Sweden was preceded by two other increments of 0.25 percent and 0.5 percent despite the Riksbank in February saying that the policy rate would remain at zero percent until 2024.
Like elsewhere in the world, the Riksbank's sharp rise came in response to staggering inflation, which hit 9 percent year on year in Sweden in August.
The rate hike now risks pushing inflation even higher as imported goods get more expensive -- a problem that will be compounded by the U.S. Fed's rate hike announcement on Wednesday, Alexander Noren, an economy commentator at public service broadcaster SVT, said.
"It's like a race to the top where no one wants to be left behind when it comes to interest rate increases. Nobody wants a currency that is too weak because then it becomes more expensive to import," Noren said.
On top of the rate hikes, other factors are also at play, according to Elisabeth Kopelman, an economist at financial services group Skandinaviska Enskilda Banken (SEB).
"The krona is affected to a lesser degree than usual by the Riksbank and the interest rate (hike) and is primarily driven by global risk sentiment, which we expect to remain sour during the autumn," TT quoted Kopelman as saying.