Hedge funds make money buying and selling shares. It is thought that Archegos made some large investments in certain companies that started to go wrong, and its backers then insisted it raise money in a hurry, in what is known as a margin call, prompting some unusually large share sales.
However, charity shops are better prepared this time, Mr Osterley said. Take for example Stockport hospice charity, Beechwood Cancer Care. There's been a queue of customers at its Heald Green precinct. But it is only open to shoppers, not droppers, this week.