Musk, who has a history of being playful on Twitter, posted his own letter on Twitter addressing Einhorn as “Dear Mr. Unicorn (fabulous name btw)”. Einhorn means unicorn in German.
Musk further added that Einhorn made numerous “false allegations” against Tesla and offered “sympathies” for a drop in assets under management.
“It is understandable that you wish to save face with your investors, given the losses you suffered from Tesla’s successful third quarter, especially since you’ve had several down years in performance and a sharp drop in assets under management from $US15 billion to $US5 billion,” Musk wrote.
Einhorn responded with an open letter on Twitter, asking the billionaire entrepreneur to be specific about false statements, so that Greenlight could correct them.
“By continually changing the narrative and narrowly averting crisis after crisis, you certainly have kept it interesting,” Einhorn said.
Einhorn said his hedge fund and Tesla had “some similarities and some differences”.
“We both struggled last year. However, a key difference is that Greenlight’s business has generated real profits for our investors since we began in 1996,” Einhorn said.
Greenlight Capital first rose to prominence for making a prescient call on Lehman Brothers’ accounting troubles before the firm’s collapse.
Last year, it compared Tesla to Lehman and earlier this year said the company appeared to be “on the brink” of failure. In August, Einhorn called on Musk to resign after Business Insider reported on a Tesla effort to replace faulty parts on its rooftop solar systems.
Musk invited Einhorn to meet him and tour Tesla’s facilities to learn about the company’s progress.
“Finally, please allow us to send you a small gift of short shorts to help you through this difficult time,” Musk said, signing off as “Treelon Musk”, a reference to his tree-planting donation.
It wasn’t the first time the men have sparred. Last year, Einhorn acknowledged receiving an earlier transmission of shorts.