In Monday's premarket, Microsoft shares rose 0.3 % after the United Kingdom's antitrust agency announced it will investigate Microsoft's $16 billion acquisition of artificial intelligence and speech technology company Nuance Communications.

The Competition and Markets Authority has stated that it will look into whether the purchase will reduce competition in the local market. Interested parties have until January 10 to comment on the deal.

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Deals involving Big Tech are being scrutinized more closely by the antitrust monitor. It vetoed Meta Systems' purchase of Giphy, a GIF site, earlier this month. Regulators, on the other hand, are stepping up their scrutiny of corporations that own sensitive technologies, particularly those that raise worries about data privacy and national security.

Another deal under scrutiny is Nvidia's acquisition of ARM, a semiconductor design firm based in the United Kingdom.

According to a major Newswire, the Microsoft-Nuance merger is expected to receive unconditional EU antitrust approval before the holiday season.

The pact has previously been approved by the United States and Australia.

Nuance claims to serve around 80% of hospitals in the United States and is noted for pioneering voice technology and assisting in the introduction of Apple's Siri.

Clinical speech recognition, medical transcription, and medical imaging are among the sophisticated solutions it offers.