Premarket movers Mag 7 stocks are mostly higher: Alphabet is up 1.8% after Google announced its much-awaited new frontier model called Gemini 4 Argon (Amazon +1%, Apple -0.2%, Meta little changed, Microsoft +0.8%, Nvidia (NVDA) +0.6%, Tesla (TSLA) +0.3% Accenture (ACN) gains 17% after the IT services company reported fourth-quarter results that beat expectations on key metrics, including revenue and bookings. Constellation Energy (CEG) rises 3% after the operator of gas power plants said it signed a 20-year power purchase agreement with Amazon, which covers 690 megawatts of nuclear capacity at Maryland’s Calvert Cliffs Clean Energy Center, including a 190-megawatt uprate. Liquidia (LQDA) falls 5% — set to extend decline for a second day — after BTIG downgraded the drugmaker to neutral from buy, citing a court ruling that found Liquidia infringed two claims of rival, United Therapeutics’ patent. Nu Holdings (NU) gains 5% after the company said it’s not pursuing a deal with Monzo Bank Ltd. Oracle (ORCL) is up 1.9% after the Financial Times reports that Tencent agreed to a five-year lease across the US cloud technology firm’s data centers in Southeast Asia. Rocket Lab (RKLB) gains 4% after Citi initiated coverage on the space company with a buy rating, calling it a “core holding for space bulls.”. Vicor (VICR) rises 12% after the maker of power-conversion technology raised its third quarter sequential revenue growth guidance citing increased royalties from the previously announced first non-exclusive license to Vertical Power Delivery.