Mittal's stake in ArcelorMittal, the steel conglomerate, fell from 33.24 billion pounds on June 4 this year to 16.63 billion pounds at the close of Friday, Oct 3's markets. The loss is the equivalent to 137 million pounds a day or nearly 6 million pounds an hour.
The steel tycoon is the biggest loser, although he remains the wealthiest in the country. The plight of these billionaires including Mittal's, came as a surprise to many.
Mittal is also joint owner of the Queens Park Rangers with Bernie Ecclestone, head of Formula One, and Flavio Briatore, Managing Director of the Renault F1 team. They sparked protests from fans last weekend after raising prices for some games to 50 pounds, the most expensive tickets in the Championship.