China has just found Omicron in Dalian, a major port city. Omicron has now spread to 2 major Chinese port cities. This may cause global supply chain issues to worsen as movement restrictions are imposed, and add to inflation.
This development is not market friendly, as higher inflation will cause faster central bank tightening. US and European market futures are slightly red, so there isn’t a major impact on general market sentiment yet.
If you are trading, you probably need to monitor closely whether it worsens and brings down the markets in a significant way.