Investopediaยท2025-09-12 22:25Group 1: Market Movements - Shares of Warner Bros. Discovery (WBD) surged 16.7%, marking the best performance in the S&P 500 for the second consecutive day, driven by speculation of a cash takeover bid from Paramount Skydance (PSKY) [4][8] - Paramount Skydance shares increased by 7.6% following the takeover bid reports [4][8] - Major U.S. equity indexes showed mixed results, with the S&P 500 ending with a loss of less than 0.1%, the Dow dropping 0.6%, and the Nasdaq gaining 0.4% to achieve its fifth straight record closing high [3] Group 2: Sector Performance - Vaccine makers, including Moderna and Pfizer, faced declines, with Moderna shares dropping 7.4% and Pfizer down 4%, following reports linking COVID-19 vaccines to child deaths [10][8] - Tesla (TSLA) shares rose 7.4%, bolstered by expectations of a Federal Reserve rate cut and positive developments in its humanoid robot business [5] - Micron Technology (MU) shares gained 4.4%, reaching an all-time closing high, supported by strong demand for its memory chips and a price target increase from Citi analysts [6] Group 3: Company-Specific Developments - Arista Networks (ANET) shares fell 8.9% despite guiding for 20% revenue growth in fiscal 2026, as concerns arose regarding long-term operating margins being projected below fiscal 2025 levels [9] - Oracle (ORCL) shares retreated 5.1% after a strong post-earnings rally, with analysts expressing concerns about the company's growth being heavily reliant on a small number of clients [11]