Best among the most traded stocks in the OMXS30 list were the white goods giant Electrolux and the investment company Kinnevik, up 6.2 and 4.2 percent, respectively. The mining group Boliden rose 2.7 percent after the announcement that the company is buying two mines from Lundin Mining.
At the other end, the defense group Saab fell 6.4 percent, and the real estate company SBB, down 3.5 percent.
The Stockholm stock exchange ended last week on a plus and had thus risen for eight trading days in a row. With Monday's marginal decline, the OMXS has now risen 10.5 percent since the turn of the year.
The oil price continued to rise after the weekend's developments in Syria, where President Bashar al-Assad was overthrown. A barrel of North Sea oil, also known as Brent oil, cost around 72 dollars at the close of the exchange.
On the leading European stock exchanges, the trend was mixed. The FTSE index in London and the CAC index in Paris rose, while the DAX index in Frankfurt fell back. The index movements were less than 1 percent on all three exchanges.