Among the heavyweights, among others, the truck manufacturer AB Volvo and the air heat pump company Nibe, rose by 6.8 and 5.2 percent, respectively.
Also, the engineering company Alfa Laval had a lively day, up 4 percent, after a raised recommendation from Danske Bank.
Prior to the stock market opening, the steel manufacturer SSAB and the forest company Stora Enso reported their quarterly figures but went in different directions. SSAB fell 9 percent, while Stora Enso rose 5.3 percent.
During the night's trading on Asian stock exchanges, it has been upwards, most of all on the Tokyo stock exchange, which rose 3.5 percent.
At the close in Stockholm, all the major European stock exchanges in Frankfurt, London, and Paris were safely on the plus side.
Also, Wall Street in New York had risen.
The krona is strengthening against both the dollar and the euro. One dollar costs 9.53 kronor, while the euro is trading at 11.18 kronor.
With the price increase on Wednesday, the Stockholm stock exchange has risen 2.9 percent since the turn of the year.
The market, apart from tariffs, is also focusing a lot on Wednesday evening's reports on Wall Street, where Google owner Alphabet and Elon Musk's Tesla will present their quarterly figures.
