Nokia Oyj's stock plummeted 5.04% intraday on Wednesday, sharply reversing direction after an initial positive reaction to a significant strategic announcement.

The telecommunications equipment maker, in partnership with Nvidia, announced the launch of the industry's first commercial artificial intelligence-powered radio access network (AI-RAN) platform. The platform is designed to unlock significantly more capacity from existing network infrastructure, with demonstrated spectral efficiency gains of over 20% and targets of 50% by 2027 and more than 100% by 2028.

The news initially fueled a pre-market surge of over 3% for Nokia shares. However, the stock failed to sustain those gains during regular trading, with the intraday plummet suggesting a "sell the news" reaction. Investors may be evaluating the commercial timeline, as the platform is slated for pilot deployments later this year but will not be commercially available until 2027 through a subscription-based software model.