The Stockholm Stock Exchange closed with a mixed trend on Monday, the penultimate trading day before the Christmas holidays. The performance was in line with Frankfurt, while London and Paris posted minor declines.

There were relatively small price movements among the heavyweights in the OMXS30. Mining company Boliden traded above 500 kronor for the first time in the morning, while defensive stocks like Tele2 and Astra Zeneca retreated. In the news flow, Intrum recorded a write-down in the billions.

At the close, the OMXS30 index was up 0.13 percent at 2,845.06. Shares worth approximately 13.5 billion kronor were traded on the Stockholm Stock Exchange.

The best-performing major industrial sector on the exchange was energy, up 1.4 percent. On the other end, consumer staples were at the bottom with a loss of 0.7 percent.

Among the leading stocks in the OMXS30 index, EQT rose 1.6 percent while Skanska B was up 1.2 percent. The worst performer was Tele2 B, down 0.8 percent, while Astra Zeneca fell 0.6 percent.

Credit management company Intrum is taking write-downs totaling 3.4 billion kronor in its results for the fourth quarter of the year. The write-downs mainly concern goodwill, but also include tax receivables in the Spanish operation. The share closed 0.6 percent higher.

Private equity firm EQT is acquiring A-Train, the infrastructure manager of the Arlanda Line and operator of Arlanda Express. The acquisition is being made through the EQT Active Core Infrastructure I fund and includes the entire company. The terms of the deal have not been disclosed.

Construction company Skanska reported a series of transactions, including an order in the US worth 1.1 billion kronor and the sale of two properties in Copenhagen for 1.5 billion kronor.

Real estate company Catena has signed a letter of intent to acquire a portfolio of 20 logistics properties in Sweden, Denmark, and Finland valued at 9 billion kronor. The share dropped 1.6 percent.

Major shareholder Amplex raised its takeover bid for medical technology group Addvise Group to 1.72 kronor per share, compared to the previous 1.65 kronor per share. The bidder has secured control of just over 51 percent of the company's capital. The B share rose 7.8 percent to 1.63 kronor.

Among the smaller companies, Alzinova and Nexam announced rights issues. Alzinova fell by 44 percent, while Nexam dropped 25 percent.

Mining company Viscaria climbed 18 percent. Handelsbanken has initiated coverage with a buy recommendation and a target price of 27 kronor.

Fertility company Vitrolife increased 3.9 percent after a buy recommendation from Dagens industri.

Mining company Lundin Mining rose 2.8 percent. Cormark Securities upgraded its recommendation to buy, from market perform.