Tesla Inc. stock on Monday traded as high as $280.67, its highest intraday in nearly 19 months, as CEO Elon Musk spoke about a "merger" between intelligence and artificial intelligence to keep humans useful. The company shares traded as high as $286.65 on July 20, 2015, days after Musk unveiled three new options for Tesla's Model S sedan, including the first iteration of Tesla's "ludicrous mode," which ramps up acceleration on Tesla vehicles. The stock corrected sharply the following day, down more than 5%. Tesla reached a record close of $286.04 on Sept. 4, 2014.
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