An uncertain prospect of reaching a peace settlement in the war in Iran is affecting markets.
On major stock exchanges around the world, trading is mixed, with futures slightly up in Frankfurt but down in London.
The price of North Sea oil (Brent) climbed 2.4 percent to $93.35 per barrel.
Last week ended higher on Wall Street - and earlier the same was true in Stockholm. The OMXS index rose 0.5 percent, bringing its year-to-date gain to 4.8 percent.
