• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
TechTesla

Elon Musk’s false ‘funding secured’ tweet caused Tesla investors ‘consequential harm’ to the tune of $12 billion, jury told

By
Joel Rosenblatt
Joel Rosenblatt
and
Bloomberg
Bloomberg
Down Arrow Button Icon
By
Joel Rosenblatt
Joel Rosenblatt
and
Bloomberg
Bloomberg
Down Arrow Button Icon
January 31, 2023, 7:56 PM ET
Elon Musk, chief executive officer of Tesla.
Elon Musk, chief executive officer of Tesla.Marlena Sloss—Bloomberg/Getty Images

Tesla investors lost $12 billion over 10 days as a result of Elon Musk’s famous tweet in 2018 that he had “funding secured” to take the company private, a witness testified at a trial over the CEO’s liability.

Lawyers for Musk have said there are billions of dollars in damages at stake in the trial, now in its third week in San Francisco federal court. Testimony presented to jurors Tuesday by expert witnesses for the plaintiffs was aimed at showing that Musk’s August 2018 Twitter posts sent Tesla’s stock on a roller coaster ride that hurt investors who held a variety of positions, long and short.

The loss figure was presented to the jury by Michael Hartzmark of Forensic Economics, who testified about how he measured the impact of Musk’s tweets on the prices of Tesla securities. The $12 billion estimate applies to all Tesla investors, which is a larger group than those who are part of the class-action lawsuit.

Hartzmark didn’t offer a bottom-line number for how much the plaintiffs are seeking in damages, but he told the jury that Musk’s tweets did “consequential harm” to investors and laid out his methodology for calculating losses. 

It was clear the information Musk conveyed was “material,” or important to reasonable investors, as shown by the questions and concerns communicated in emails to the company’s investor relations office at the time, Hartzmark said. 

He walked jurors through how Tesla’s share price spiked in response to the initial announcement from Musk — and then declined sharply as doubts grew about the take-private plan, in part fueled by public knowledge that the US Securities and Exchange Commission was investigating the tweets.

“Uncertainty is the kryptonite of investors,” Hartzmark said. “As this went drip, drip, drip over time it would have a negative impact” on the share price.

Andrew Rossman, a lawyer for Musk, got Hartzmark to reluctantly acknowledge on cross examination that the first part of Musk’s tweet, that he’s “considering” taking Tesla private, was true. The judge handling the case has previously determined that the second piece of Musk’s tweet, that he had “funding secured,” was false.

Rossman asked whether Hartzmark examined the effect of the truthful part of the tweet on Tesla’s stock price separately from the element that has been ruled false.

“It’s an interwoven bundle,” Hartzmark replied. He evaluated them together, he said, because Musk had previously indicated he’d like to take Tesla private and that fact was reflected in Tesla’s stock price before the CEO’s tweet. The only new information in the 10-day period covered by the lawsuit was Musk’s assertion that he had “funding secured,” he said.

Earlier the jurors heard from Steven Heston, a professor of finance at the University of Maryland. Another expert witness for the investors, Heston shared his research about what happened to Tesla options from Aug. 7, 2018, when Musk posted his tweets, over 10 days, as the proposed plan to take the company private fell apart. He noted an “abrupt movement” in options prices over the period and an “unprecedented” pattern in the volatility of long-term options prices.

Heston showed the jurors how a short-term call option expiring one month after Musk’s tweet, at a strike price of $420 – the share price at which Musk said Tesla would go private – rose almost $2. A long-term call at the same stock price but expiring Jan. 17, 2020, lost $22.40.

Musk has testified that the “funding secured” tweet was “absolutely truthful,” touting what he described as an “unequivocal” commitment by Saudi Arabia’s sovereign wealth fund to back the go-private plan with billions of dollars — even though he had nothing in writing.

Investors argue Musk’s tweets amounted to a violation of securities laws because his bankers had been barely consulted and hadn’t formally signed on to his take-private plan. Investment banking witnesses told jurors last week that even a week after the tweet, they were still working to figure out how the deal would be structured, including who would pay for it.

US District Judge Edward Chen said as court adjourned for the day that he expects the case will go to the jury by Friday.

Learn how to navigate and strengthen trust in your business with The Trust Factor, a weekly newsletter examining what leaders need to succeed. Sign up here.

About the Authors
By Joel Rosenblatt
See full bioRight Arrow Button Icon
By Bloomberg
See full bioRight Arrow Button Icon

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Tech

Disney’s new CEO is exploring a ‘super app’ for theme park tickets, movies and more
Big TechMedia
Disney’s new CEO is exploring a ‘super app’ for theme park tickets, movies and more
By Thomas Buckley, Lucas Shaw and BloombergMay 2, 2026
5 hours ago
Apple raises Mac Mini’s starting price to $799 after AI frenzy drains supply
AIChips
Apple raises Mac Mini’s starting price to $799 after AI frenzy drains supply
By Chris Welch, Mark Gurman and BloombergMay 2, 2026
5 hours ago
Unionized workers form alliance with rich tech giants on AI data centers, pushing back on local opposition and redrawing political lines
AIData centers
Unionized workers form alliance with rich tech giants on AI data centers, pushing back on local opposition and redrawing political lines
By Marc Levy and The Associated PressMay 2, 2026
5 hours ago
Jensen Huang says some CEOs have a ‘God complex’ when it comes to AI apocalypse warnings, which can create shortages of critical workers
AIchief executive officer (CEO)
Jensen Huang says some CEOs have a ‘God complex’ when it comes to AI apocalypse warnings, which can create shortages of critical workers
By Jason MaMay 2, 2026
10 hours ago
Photo of several people working on a presentation together
AICareers
Big Tech is shelling out up to $1 million for new hires who will never have to write a line of code
By Sydney LakeMay 2, 2026
12 hours ago
dario
CommentaryAnthropic
Anthropic’s most powerful AI model just exposed a crisis in corporate governance. Here’s the framework every CEO needs.
By Jeffrey Sonnenfeld, Stephen Henriques, Dan Kent and Holden LeeMay 2, 2026
15 hours ago

Most Popular

Scott Bessent on financial literacy: 'it drives me crazy' to see young men in blue-collar construction jobs playing the lottery
Personal Finance
Scott Bessent on financial literacy: 'it drives me crazy' to see young men in blue-collar construction jobs playing the lottery
By Fatima Hussein and The Associated PressMay 1, 2026
2 days ago
Gen Z is rebelling against the economy with ‘disillusionomics,’ tackling near 6-figure debt by turning life into a giant list of income streams
Economy
Gen Z is rebelling against the economy with ‘disillusionomics,’ tackling near 6-figure debt by turning life into a giant list of income streams
By Jacqueline MunisMay 2, 2026
12 hours ago
A Chick-fil-A worker got fired and then showed up behind the register to allegedly refund himself over $80,000 in mac and cheese
Law
A Chick-fil-A worker got fired and then showed up behind the register to allegedly refund himself over $80,000 in mac and cheese
By Catherina GioinoMay 1, 2026
1 day ago
Current price of oil as of May 1, 2026
Personal Finance
Current price of oil as of May 1, 2026
By Joseph HostetlerMay 1, 2026
2 days ago
Stop donating to Harvard and the Ivy League. There's a better option that MacKenzie Scott already figured out
Commentary
Stop donating to Harvard and the Ivy League. There's a better option that MacKenzie Scott already figured out
By Ed Smith-LewisMay 2, 2026
18 hours ago
The American household just took an 81% margin cut. Wall Street hasn’t priced it in
Commentary
The American household just took an 81% margin cut. Wall Street hasn’t priced it in
By Katica RoyMay 2, 2026
15 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.