On the OMXS30 list of the most-traded stocks, most companies fell. The worst performers were online casino company Evolution, which fell 2.5 percent, followed by venture capital company EQT, which fell 2.2 percent.
Telecom giant Ericsson, among others, bucked the trend, rising 2.5 percent. Heat pump manufacturer Nibe also performed strongly, up 2.2 percent.
The leading European stock exchanges also fell on Monday.
Developments in the Middle East, where the US is reported to have seized an Iranian cargo ship, have caused oil prices to rise. A barrel of North Sea oil was around $95 late Monday afternoon.
