Skip to content
City PM
  • Germany
  • France
  • Europe
  • Markets
  • Business
  • Opinion
  • Germany
  • France
  • Europe
  • Markets
  • Business
  • Opinion
Monday 07 April 2025 8:08 am  |  Updated:  Monday 07 April 2025 12:40 pm

Billionaire investor Bill Ackman warns of ‘economic nuclear winter’ from Trump tariffs

By: Matt Kenyon

Digital Editor

Add as a preferred source on Google
Play Video

Hedge fund manager Bill Ackman has issued a stark warning to the US President, urging him to pause the sweeping package of tariffs revealed last week on his so-called ‘Liberation Day’.

In a post on X, Ackman declared: “The President has an opportunity on Monday to call a time out and have the time to execute on fixing an unfair tariff system.

“Alternatively, we are heading for a self-induced, economic nuclear winter, and we should start hunkering down.”

Despite pressing that he was sympathetic towards the aims of Trump’s tariffs, saying that the US “is 100 per cent behind the president on fixing a global system of tariffs that has disadvantaged the country”, but “business is a confidence game and confidence depends on trust.” 

He cautioned that the “massive and disproportionate” tariffs have gone too far, and that the US is “in the process of destroying confidence in our country as a trading partner, as a place to do business, and as a market to invest capital.”

Ackman added: “What CEO and what board of directors will be comfortable making large, long-term, economic commitments in our country in the middle of an economic nuclear war?

“I don’t know of one who will do so.”

Read more

UK in line for fresh US tariff hit as Trump proposes ‘forced labour’ levy

Breaking news conference podium with microphone, focused on speakers notes and event backdrop, set for journalist updates

Global markets carnage continues

Global markets are bracing for another bruising week, with the FTSE 100 set to fall even further on Monday. 

On Friday, the FTSE 100 closed on a staggering 4.9 per cent loss at 8,063.12 – the worst tumble for the London index since the start of the Covid lockdown in March 2020. 

The S&P 500 fell nearly five per cent whilst the Dow Jones plunged four per cent.

Ackman endorsed Trump in his third bid for the White House in 2024, but now says that the scale of the tariffs was “not what we voted for.” 

He announced his support for Trump’s bid for the White House following the assassination attempt on the now-US President.

“The consequences for our country and the millions of our citizens who have supported the president — in particular low-income consumers who are already under a huge amount of economic stress — are going to be severely negative,” he added. 

Signing off on his extended social media warning to Trump, Ackman said: “May cooler heads prevail.”

Read more

UK firms ‘bracing for change’ as Trump revives tariff threat over Big Tech tax

Donald Trump addressing media at a press event, wearing a suit and tie, with reporters and cameras in the background.

Share this article

  • Facebook
  • X
  • LinkedIn
  • WhatsApp
  • Email

Similarly tagged content:

Sections

  • News

Categories

  • Business
  • Markets

People & Organisations

  • Bill Ackman
  • Donald Trump
  • Dow Jones
  • ftse 100
  • Liberation Day
  • tariffs

Trending Articles

  • Burnham tax plans spark investor rush to bank capital gains

  • Brewdog chief executive quits after only one year

  • Nothing fails to file accounts months after dissolution threat

  • UK ‘no longer a serious place’ says Hedge fund boss after losing £200m tax battle

  • Cruyff turn: Starmer allows pubs to stay open for England World Cup game

More from City PM

  • UK in line for fresh US tariff hit as Trump proposes ‘forced labour’ levy

    Economics
    Breaking news conference podium with microphone, focused on speakers notes and event backdrop, set for journalist updates
  • UK firms ‘bracing for change’ as Trump revives tariff threat over Big Tech tax

    Tech
    Donald Trump addressing media at a press event, wearing a suit and tie, with reporters and cameras in the background.
  • Steel tariffs watered down after industry backlash

    Industrials
    Britains steel industry facing challenges with potential shutdowns and job losses, highlighting economic impact.
  • CBI: 200,000 more Brits to face unemployment this year as growth crumbles

    Economics
    People waiting outside a job centre, highlighting unemployment issues and job search challenges in the current economy.
  • UK manufacturers facing ‘steel quota cliff edge’

    Industrials
    The steel industry has been particularly badly hit by rising energy costs
  • Global trade remains ‘alive and well’ despite tariffs and war, says DHL boss

    Tech
    General news image showing a diverse group of people in a corporate meeting discussing business strategies in a modern off...
  • Ovo to cough up £10.4m for exposing vulnerable customers to harm

    Energy
    Stephen Fitzpatrick is the billionaire founder of Ovo Energy.

City PM — European politics, business and analysis.

Europe

  • Germany
  • France
  • Europe
  • UK & Ireland

Topics

  • Business
  • Markets
  • AI
  • Technology
  • Opinion
  • Energy

More

  • Politics
  • Economics
  • Fintech
  • Legal
  • Sport
  • Life

Company

  • About City PM
  • Editorial Policy
  • Corrections
  • Contact
  • Terms of Use
  • Privacy Policy
  • Cookie Policy
© 2026 City PM · Published by CityPM Media, Bahnhofstrasse 65, 8001 Zürich, Switzerland
About · Editorial Policy · Corrections · Contact · Privacy