Indian billionaire Gautam Adani hits back after fraud claims wipe billions off his company.
The group lost almost $11bn (£8.7bn) of its market value after the research was made public on Wednesday.
It is now considering legal action against New York’s Hindenburg Research.
Adani Group is one of India’s biggest companies, and has operations in a wide range of industries including commodities trading, airports, utilities and renewable energy. It is led by Indian billionaire Mr Adani who is the world’s fourth richest man, according to Forbes magazine.
Hindenburg, meanwhile, specialises in “short-selling”, or betting against a company’s share price in the expectation that it will fall.
In its report, Hindenburg accused Mr Adani of “pulling the largest con in corporate history”. This came days ahead of a planned sale of Adani Group shares to the public.