A man smashed up a computer in the Trafford Centre as he was angry that the company's share price had dropped.
The customer, who had invested shares in the company, was frustrated that he had lost money, police said.
Posting on Twitter, officers said the man stormed into the shopping centre demanding to speak to a manager.
When he was told that wasn't possible, he damaged a computer at the customer service desk.
In a post on Twitter, put up at 12.40pm, GMP Stretford wrote: "Officers had to attend the Trafford Centre to reports of a male causing issues due him losing money after their share price dropped.
"He demanded to speak to management and when told it wasn't possible proceeded to damage the a computer screen at the customer services desk."
The Trafford Centre is owned by real estate investment trust Intu, whose share price fell sharply in February after talks with a potential investor collapsed.
The London-based property company had to issue an emergency call for investment over its estimated debt of £5bn. Its value had also plunged from £2.8bn in November 2018 to £164m earlier this year.
