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* Tesla jumps as CEO Musk says he has sold 'enough' stock. * Pfizer rises as oral COVID-19 pill wins approval. Dec 22 - Wall Street's main indexes powered higher on Wednesday in a broad rally after upbeat economic data and hopeful developments about the severity of the Omicron coronavirus variant that is sweeping the world.The S&P 500 gained at least 1% for a second straight session, putting it near record levels, as volatility has ratcheted up in the last month of 2021 following the arrival of

Tesla shares rose more than 1% in premarket trading. Tesla CEO Elon Musk said he had sold "enough st

Alibaba shares fell 3.45% in premarket trading.Chinese regulators have suspended an information-sharing partnership with Alibaba Cloud Computing, a subsidiary of e-commerce conglomerate Alibaba Group, over accusations it failed to promptly report and address a cybersecurity vulnerability, according to state-backed media reports.