The Stockholm Stock Exchange traded with a choppy trend at midday on Monday. In the news flow, Lundin Gold rose following a silver deal. Otherwise, it is the last week of earnings season and school holidays in Stockholm.

U.S. President Donald Trump announced on Saturday that he has chosen to raise the newly introduced global tariffs to 15 percent. The announcement came a day after he had said the tariff rate would be set at 10 percent, in response to the Supreme Court's decision on Friday to invalidate his reciprocal tariffs against the rest of the world. The largest political groups in the European Parliament are now prepared to freeze ratification of the union's trade agreement with the U.S. following the new tariff announcements.

At 1:00 p.m., the OMXS30 index was up a marginal 0.01 percent at 3,180.80. Shares worth approximately SEK 6.8 billion had been traded on the Stockholm Stock Exchange.

Among the major industrial sectors on the exchange, energy performed best with a gain of 1.1 percent. On the other hand, healthcare was at the bottom with a decline of 0.5 percent.

Among the leading stocks included in the OMXS30 index, Boliden rose 1.8 percent while Epiroc A was up 1.4 percent. The worst performer was EQT, down 3.7 percent, while Saab B fell 2.9 percent.

Mining company Lundin Gold signed a binding letter of intent with LunR Royalties regarding a silver deal worth USD 670 million, equivalent to SEK 6.1 billion, linked to the Fruta del Norte mine in Ecuador. The deal means that Lundin Gold sells a silver stream in exchange for newly issued shares in LunR, which are planned to be distributed to Lundin Gold shareholders. The stock rose 3.3 percent.

Software company Formpipe Software is initiating a share buyback program of up to SEK 135 million. The background is that the company has cash on hand following the sale of its Public business area. The stock rose 3.5 percent.

Gaming company Embracer increased by 2.9 percent. Lars Wingefors, major shareholder and chairman, has purchased shares in the company for SEK 10 million.

Search company Eniro climbed 16 percent. Former major shareholder Spectrumone has sold its entire holding in the company to Eva and Mats Qviberg. The Qviberg family now owns 17 percent of the shares, and Mats Qviberg states he is ready to take on Eniro.

The education app Albert reported lower revenue while its EBITDA result turned positive in the fourth quarter, compared to a loss in the same quarter the previous year. The stock rose 3.3 percent.

Online pharmacy Apotea advanced 5.5 percent after a buy recommendation from Dagens industri.

Biotech company Xbrane Biopharma fell by 15 percent. Pareto downgraded its recommendation to hold, from buy previously, and sharply cut the target price after a lack of progress from the company.

SB1 Market downgraded its recommendation for plumbing company FM Mattsson to neutral, from buy. However, the stock rose 0.8 percent.

Verve Group dropped 3.2 percent. Nordea downgraded its recommendation to hold, from buy.