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Check out the companies making headlines in midday trading Monday:
Moderna — Moderna shares surged more than 9% after CEO Stephane Bancel said Monday it will take months to distribute a Covid vaccine specifically targeting the omicron variant, but a higher 100-microgram dose of the booster shot could be ready «right away.» Bancel said it will take at least two weeks to study how the new variant's mutations impact the efficacy of current vaccines.
Twitter — Shares of the social media company fell about 1% after news that CEO Jack Dorsey is stepping down, effective immediately. Parag Agrawal, the company's chief technology officer, will take over as chief executive. Dorsey was serving as both the CEO of Twitter and Square, his
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