Tesla's new electric semi truck is unveiled during a presentation in Hawthorne, California, US, November 16, 2017.
Tesla's shares rose about 8.9 percent to hit $1,025 on Thursday after Musk's email was reported, making the Silicon Valley company the second-most valuable automaker in the world, behind Japan's Toyota Motor Corp. Markets predict the share price could even reach as high as $1,500 after Musk unveils new "million-mile" battery technology that could deliver longer life, lower costs and better range for future Tesla vehicles.
Musk has said Tesla is scouting other US states for a site to build a new factory, hinting that Texas could be a candidate. Oklahoma and other states are campaigning for the investment. Musk's Tuesday message coincides with a surge in the share price of rival clean truck maker Nikola Corp.Nikola, an electric and fuel cell truck startup, earlier this month began trading on the NASDAQ after it merged with special purpose acquisition company VectoIQ.