Monday's rise on the Stockholm Stock Exchange came after the price of Brent crude fell more than 6 percent following weekend reports of a pause in attacks between Iran and the United States.
Live casino operator Evolution rose sharply, 6.7 percent, after Friday's announcement that major shareholder American Kenneth Dart now owns more than 30 percent - the threshold that triggers a mandatory bid for the rest of the company's shares.
Saab rose 2.3 percent after the announcement that the defence group had secured a new billion-dollar order.
Early trading on Wall Street pointed higher for the Dow Jones industrial average and the broad S&P 500, while the tech-heavy Nasdaq started lower.
