It had announced plans for the 2032 bond, to meet rising demand for longer-dated debt, in December.

The volume issued was 11.0 billion crowns ($1.63 billion) and the exchange was made 0.46 percentage points above the debt office's 10-year bond, it said in a statement.

"We had announced a volume in the range of SEK 10-20 billion. The volume issued reflected the demand, given our pricing," it said on Tuesday. "The bond was sold through syndication where the lead managers jointly sold the bond on our behalf."

The debt office said it would not offer further issuance of the new bond in the near future.

"As our borrowing requirement is limited, it was reasonable to conduct the sale with an exchange," it added.