On the OMXS30 list of most-traded stocks, ball-bearing manufacturer SKF fell 3.2 percent after an interim report. Defense group Saab fell by the same amount.
Online broker Avanza also fell, dropping 3.3 percent.
Heat-pump manufacturer Nibe rose the most among the most-traded companies, up 1.8 percent.
Stockholm was in the red until the last hour. The turnaround then coincided with a rapid, sharp increase in the price of oil. North Sea oil is now trading at $98.10.
The stock exchanges in Frankfurt, London and Paris also fell. The three major indexes in New York have also turned negative after a buoyant start.
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