The best performer on the OMXS30 list of the most-traded stocks was venture capital firm EQT, up 3 percent, after the Rausing family bought over 5 percent of the shares for around 17 billion.
Telecom operator Telia also had a relatively good day, up 0.9 percent.
Engineering company Sandvik and mining equipment company Epiroc fared worse, falling 6.3 and 4 percent respectively.
The oil industry in the Persian Gulf continues to be pressured by Iranian attacks on civilian ships.
Prices in Stockholm fell further in the late afternoon as the price of oil rose again. A barrel of North Sea oil (Brent) now costs just over $102 per barrel. Before the US and Israel's attack on Iran on February 28, the price was around $70.
The stock exchanges in Frankfurt, London and Paris also fell. In New York, two of the three major indexes are down.
The krona is under pressure against both the dollar and the euro. A dollar now costs 9.43 kronor and a euro 10.79 kronor.
During the week as a whole, the Stockholm Stock Exchange fell 1 percent. Since the turn of the year, it has still been up slightly, 0.1 percent.
