After 30 minutes of trading, the OMXS index has fallen by almost four percent.
The development is in line with leading European stock exchanges and follows broad declines on the stock exchanges in Asia during the night.
- It is, of course, a matter of concern that Russia will invade Ukraine.
Geopolitical concerns are back on the stock market, says Maria Landeborn.
Coupled with rising inflation coupled with concerns about sharply rising interest rates:
- It is a bad cocktail for the stock market, she says.
The big banks were hit
At the same time, energy prices are rising.
An escalating Ukraine conflict is likely to contribute.
- It increases the risk that growth will take a beating, then the stock market will fall, says Landeborn.
The decline on the Stockholm Stock Exchange is broad with all shares in the OMXS30 index at minus.
The cloud service company Sinch and the online casino developer Evolution fall by about 5 percent or more.
The big banks are also taking a beating.
SEB and Nordea's shares lose 3-4 percent.
In the engineering sector, the truck manufacturer AB Volvo and the ball bearing manufacturer SKF weigh in with price falls of 3.9 and 3.5 percent, respectively.
The price of oil is rising
The oil sector is going against the flow.
Lundin Energy's share has risen about 1 percent since the oil price during the night's trading touched $ 98 per barrel - the highest listing since 2014.
- It is really only the oil companies that benefit at the moment, says Maria Landeborn.
In the foreign exchange market, there is also clear unrest, as investors seek safe havens such as the dollar and the Swiss franc.