• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
FinanceInvestors Guide

Investors Aren’t Convinced the Pfizer-Allergan Deal is a Go

By
Stephen Gandel
Stephen Gandel
Down Arrow Button Icon
By
Stephen Gandel
Stephen Gandel
Down Arrow Button Icon
November 23, 2015, 4:20 PM ET
Pfizer In Merger Talks With Allergan PLC
NEW YORK, NY - OCTOBER 29: The Pfizer headquarters in New York City stands in the heart of Manhattans business district on October 29, 2015 in New York City. Ireland-based Allergan confirmed October 29, that it has been approached by the U.S. drug company Pfizer and is in talks regarding a potential deal. These are just the latest two pharmaceutical companies to start early dealmaking talks. (Photo by Spencer Platt/Getty Images)Photograph by Spencer Platt — Getty Images

Mind the gap.

Pfizer officially announced on Monday morning that it planned to acquire fellow pharmaceutical company Allergan in a so-called tax inversion deal, agreeing to pay roughly $160 billion for the company, including debt. According to the terms of the deal, each Allergan shareholder will receive 11.3 shares of Pfizer stock for every share of Allergan share they own. Pfizer is also kicking in another $12 billion in cash for the deal. That means when the deal closes, Allergan shareholders are likely to get around $355 a share. Yet, by mid-afternoon, hours after the deal was announced, Allergan’s shares weren’t trading for $355, or even $330. Instead, Allergan shares closed at just under $302, or 17% below what Pfizer said they were planning on paying for them.

It’s not uncommon for there to be some gap between what an acquirer says it will pay for a target and where the target’s shares trade. But the gap in the Pfizer-Allergan deal is larger than average. This suggests that investors are concerned the deal will not be completed.

By Monday afternoon, all three Democratic presidential candidates, Hillary Clinton, Bernie Sanders, and Martin O’Malley, had come out against the deal, saying it and deals like it are bad for American taxpayers and the economy. Clinton said she would put out proposals as early as next week to stop inversion deals, a scenario in which U.S. companies buy foreign companies and relocate overseas to reduce their tax bill.

“It’s a politically controversial deal,” says Ira Gorsky, an analyst at research firm Elevation LLC. “And the gap is a function of how much risk investors think there is in getting the deal done.”

Kevin Kedra, who follows Allergan for the research arm of mutual fund firm Gabelli & Co., thought the gap was unusual. He says the deal was leaked a few weeks ago to gauge the Treasury Department’s reaction. Last week, Treasury released new rules to limit tax inversions. But Kedra and others say none of those rules will do anything to stop the Pfizer-Allergan deal. He says investors may be overly skeptical.

“It’s a larger than usual gap,” says Kedra. “But other than an act of Congress, which I don’t think will happen, the deal gets done.”

Despite the wide gap, some are saying investors aren’t actually all that skeptical. Recently, a number of large deals have been trading at larger than usual gaps. That’s in part because of the high volume of deals. Once a deal is announced, so-called merger arbitrage hedge funds typically jump in, buying the shares of the company being acquired and shorting the stock of the company doing the acquisition. The pressure of that buying and shorting usually narrows the gap between the stock price of the acquirer and the target company. But while merger activity has boomed this year and now stands at an all-time high, the money in merger arbitrage funds has not kept up. That’s left less money to go around to arbitrage away the gaps.

“Arbs can’t control the spreads like they used to,” says Gorsky.

About the Author
By Stephen Gandel
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 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
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
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
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Finance

elon
CommentarySpaceX
The SpaceX IPO is great — but it won’t deliver 100x returns 
By Jeffrey StewartApril 1, 2026
4 hours ago
Macquarie bets impact investing can fill an Asian financial access gap for the ‘missing middle’
AsiaAustralia
Macquarie bets impact investing can fill an Asian financial access gap for the ‘missing middle’
By Nicholas GordonApril 1, 2026
6 hours ago
Trump at a podium
PoliticsIran
Trump will address the nation about the Iran war on Wednesday. Here’s what to expect
By Eva RoytburgApril 1, 2026
7 hours ago
Deutsche Bank asked AI if it’s true that AI will solve the economy’s inflation problems. The robots answered
Economydisruption
Deutsche Bank asked AI if it’s true that AI will solve the economy’s inflation problems. The robots answered
By Nick LichtenbergApril 1, 2026
7 hours ago
jetblue
Travel & LeisureAirline industry
JetBlue hikes checked bag fees as much as $9 on war in Iran
By Rio Yamat and The Associated PressApril 1, 2026
7 hours ago
lin bin
North AmericaNFL
Chinese billionaire buys 1% stake in the Miami Dolphins at record $12.5 billion valuation
By The Associated PressApril 1, 2026
8 hours ago

Most Popular

Jerome Powell says the $39 trillion national debt is ‘not unsustainable,’ but warns the trajectory ‘will not end well’
Economy
Jerome Powell says the $39 trillion national debt is ‘not unsustainable,’ but warns the trajectory ‘will not end well’
By Fortune EditorsMarch 30, 2026
2 days ago
Two-thirds of parents say their adult Gen Z kids still rely on them financially  for support—even though it's putting them under strain
Success
Two-thirds of parents say their adult Gen Z kids still rely on them financially  for support—even though it's putting them under strain
By Fortune EditorsMarch 31, 2026
1 day ago
A man used AI to call 3,000 Irish bartenders to track the cost of Guinness. Now pubs are lowering their prices to compete
AI
A man used AI to call 3,000 Irish bartenders to track the cost of Guinness. Now pubs are lowering their prices to compete
By Fortune EditorsMarch 30, 2026
2 days ago
Kevin O'Leary says if you earn $68,000 a year and follow this rule, you'll retire a millionaire
Personal Finance
Kevin O'Leary says if you earn $68,000 a year and follow this rule, you'll retire a millionaire
By Fortune EditorsMarch 31, 2026
1 day ago
Hiring just hit a level not seen since the economy was ‘closed down literally’ during COVID, top economist says
Economy
Hiring just hit a level not seen since the economy was ‘closed down literally’ during COVID, top economist says
By Fortune EditorsMarch 31, 2026
1 day ago
Mark Carney lays down the gauntlet: 'It is essential that the next CEO of Air Canada is bilingual'
C-Suite
Mark Carney lays down the gauntlet: 'It is essential that the next CEO of Air Canada is bilingual'
By Fortune EditorsMarch 30, 2026
2 days 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.