The combined net worth of Malvinder and Shivinder Singh, who are Indian brothers, is -$500 million.
The Singh siblings had a net worth of $2.5 billion at a particular point in their lives.
They suffered losses due to a succession of bad investments and defaulting on loans to a fraudulent guru.
Malvinder Singh, a former chairman and CEO of Ranbaxy Laboratories, an Indian subsidiary of Daiichi Sankyo Pharmaceuticals, is a well-known personality.
After their father passed away in 1999, Malvinder and Shivinder inherited a 33.5% interest in Ranbaxy, which was founded by his grandfather.
Malvinder resigned as Chairman and CEO of the company after they decided to sell their inheritance for $2 billion in 2008.
With the exception of their stake in Ranbaxy, they have relinquished a number of international assets to focus on their Indian market. They have recently sold an Australian dental firm, a Hong Kong health care company, and a Vietnamese medical chain for a total of $700 million.
In order to adhere to the law on minimum public shareholding, they trimmed their stake in Religare and are enthusiastic about launching a bank together.
The Singh siblings jointly manage Fortis Healthcare, a hospital chain, and Religare, a financial services firm, among other businesses.
A considerable sum of money was lent by the brothers to a guru.
As of August 2018, they are obligated to pay a $500 million fine for fraud related to the sale of their drug company in 2008.
They are facing a lawsuit over the alleged theft of billions from their financial and healthcare companies.