At the close, the Saab share had climbed 16.2 percent, clearly the best on the OMXS30 index with the most traded shares. The stock exchange's broad OMX index rose 0.7 percent.
Behind the sharp rise for Saab lies the security conference in Munich over the weekend and the US's announcement to initiate peace talks with Russia about Ukraine, without Europe.
Several other defense companies also rose on the stock exchanges in Frankfurt, London, and Paris – which, like Stockholm, clearly pointed upwards on the first day of the trading week.
In Stockholm, the major banks also performed strongly. Nordea rose 2.3 percent, SEB 1.6 percent, and Handelsbanken and Swedbank both 1.5 percent.
At the bottom of the OMXS30 index was the cloud service company Sinch, down 4.7 percent. The heat pump manufacturer Nibe and the real estate company SBB fell 4.3 and 3.0 percent, respectively.
The New York Stock Exchange is closed on Monday due to a public holiday in the US.
