• Home
  • Latest
  • Coins2Day 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
Finance

This Stock Lost $1.4 Billion on Trump’s Inauguration Day

Lucinda Shen
By
Lucinda Shen
Lucinda Shen
Down Arrow Button Icon
Lucinda Shen
By
Lucinda Shen
Lucinda Shen
Down Arrow Button Icon
January 20, 2017, 4:38 PM ET
President Donald Trump.
Photograph by J. Scott Applewhite—Pool/Getty Images

Andrew Left of Citron Research, the short seller that helped bring Valeant Pharmaceuticals down to its knees, has chosen to make a very specific Trump trade public on the day of the president’s inauguration: Bet against airplane parts manufacturer TransDigm Group.

After Left published a paper Friday predicting that President Donald Trump will crack down on the prices of aerospace industry goods, shares of $13 billion TransDigm plunged as much as 13%. That made the stock the worst performing on the S&P 500 around noon that day. It also caused the company to shed $1.4 billion in market cap by the market’s close.

“President Trump has become to aerospace what Hillary was to pharmaceuticals,” Left wrote. “He has already made lowering prices for military aircraft a pillar of his transition into office.”

Left pointed to two of Trump’s tweets as a sign that the president won’t be soft on aerospace and defense. On Dec. 6, Trump wrote that the cost of a Boeing Air Force One is “out of control.” Roughly a week later, he called out the cost of Lockheed and Martin’s F-35, writing that “billions of dollars can and will be saved on military (and other) purchases after January 20.”

 

The short seller argues that Trump should target TransDigm in the future because the company appears to have arbitrarily hiked the price of its goods.

TransDigm is also highly susceptible to Trump’s influence because the Department of Defense is TransDigm’s single largest customer.

Later on Friday, Credit Suisse analyst Robert Spingarn defended the company. While he conceded that TransDigm’s goods are expensive, he added that the company has a higher growth rate and profitability than its peers. Additionally, if Trump tried to lower the prices, investors would see the warning signs.

“If the government were to pursue lower prices from TransDigm, we would expect this to be a lengthy process,” Spingarn wrote. “One thing we can’t account for is ‘tweet risk,’ but we think the likelihood of this making it to Trump’s tweet desk is low, and the likelihood of singling out a single aerospace parts supplier is even lower.”

On the same day, the S&P 500 rose 0.34%.

About the Author
Lucinda Shen
By Lucinda Shen
See full bioRight Arrow Button Icon

Latest in Finance

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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day 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 Coins2Day Editors
October 20, 2025
Rankings
  • 100 Best Companies
  • Coins2Day 500
  • Global 500
  • Coins2Day 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Leadership
  • Success
  • Tech
  • Asia
  • Europe
  • Environment
  • Coins2Day Crypto
  • Health
  • Retail
  • Lifestyle
  • Politics
  • Newsletters
  • Magazine
  • Features
  • Commentary
  • Mpw
  • CEO Initiative
  • Conferences
  • Personal Finance
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Coins2Day Brand Studio
  • Coins2Day Analytics
  • Coins2Day Conferences
  • Business Development
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Coins2Day
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Finance

EconomyTariffs and trade
Trump threatens to hike tariffs on South Korea as national assembly has yet to approve last year’s trade deal
By Josh Boak, Hyung-Jin Kim and The Associated PressJanuary 26, 2026
22 minutes ago
markets
InvestingMarkets
S&P 500 wins back all losses from Greenland dip, gold and silver surge even higher
By Stan Choe and The Associated PressJanuary 26, 2026
1 hour ago
Bridgewater Associates founder Ray Dalio sits in a chair and talks
PoliticsDonald Trump
Ray Dalio says the U.S. is a ‘tinderbox’ after the Minneapolis shooting and Trump risks a ‘more clear civil war’
By Jake AngeloJanuary 26, 2026
2 hours ago
Photo of Donald Trump
EconomyFinance
Trump’s own Big Beautiful Bill could add $5.5 trillion to the deficit and help sabotage his plan to ‘grow out’ of the national debt crisis
By Shawn TullyJanuary 26, 2026
4 hours ago
economy
EnvironmentWeather and forecasting
The billion-dollar storm? Economists debate how much activity Winter Storm Fern laid waste to
By Seth Borenstein and The Associated PressJanuary 26, 2026
4 hours ago
IRS
LawWhite House
Trump’s latest retribution hits Booz Allen, whose contractor was charged with leaking tax returns to the press
By Fatima Hussein and The Associated PressJanuary 26, 2026
5 hours ago

Most Popular

placeholder alt text
Economy
An unusual Fed ‘rate check’ triggered a free fall in the U.S. dollar and investors are fleeing into gold
By Jim EdwardsJanuary 26, 2026
13 hours ago
placeholder alt text
Politics
Trump was surging after the Venezuela raid—then came Jerome Powell, Greenland, and Minnesota. Now it feels like a ‘historic hinge moment’
By Jason MaJanuary 25, 2026
24 hours ago
placeholder alt text
Personal Finance
Sweden abolished its wealth tax 20 years ago. Then it became a 'paradise for the super-rich'
By Miranda Sheild Johansson and The ConversationJanuary 22, 2026
4 days ago
placeholder alt text
North America
Gates Foundation plans to give away $9 billion in 2026 to prepare for the 2045 closure while slashing hundreds of jobs
By Sydney LakeJanuary 23, 2026
3 days ago
placeholder alt text
Success
'The Bermuda Triangle of Talent': 27-year-old Oxford grad turned down McKinsey and Morgan Stanley to find out why Gen Z’s smartest keep selling out
By Eva RoytburgJanuary 25, 2026
1 day ago
placeholder alt text
Politics
Minnesota-based CEOs, including Coins2Day 500 bosses, call for ‘immediate de-escalation of tensions’ after fatal shooting
By Jason MaJanuary 25, 2026
1 day ago

© 2026 Coins2Day 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 Coins2Day 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.