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Below is the top 10 list of the world's riches people, with their networth in billion USD:
http://www.therichest.org/world/richest-people/
Is the ranking based on the valuation of stocks that these people own? Did Forbes capture both personal assets and personal loans, or the circumstances of business concerns that are not listed on stock exchanges?
Did Forbes ask what their liabilities are?
http://www.therichest.org/world/richest-people/
1. Carlos Slim Helu & family
Netwoth: $69 B - As of March 2012
Age: 72
Source: telecom
Citizenship: Mexico
2. Bill Gates
Netwoth: $61 B - As of March 2012
Age: 56
Source: Microsoft
Citizenship: United States
3. Warren Buffett
Netwoth: $44 B - As of March 2012
Age: 81
Source: Berkshire Hathaway
Citizenship: United States
4. Bernard Arnault
Netwoth: $41 B - As of March 2012
Age: 63
Source: LVMH
Citizenship: France
5. Amancio Ortega
Netwoth: $37.5 B - As of March 2012
Age: 75
Source: Zara
Citizenship: Spain
6. Larry Ellison
Netwoth: $36 B - As of March 2012
Age: 67
Source: Oracle
Citizenship: United States
7. Eike Batista
Netwoth: $30 B - As of March 2012
Age: 55
Source: mining, oil
Citizenship: Brazil
8. Stefan Persson
Netwoth: $26 B - As of March 2012
Age: 64
Source: H&M
Citizenship: Sweden
9. Li Ka-shing
Netwoth: $25.5 B - As of March 2012
Age: 83
Source: diversified
Citizenship: Hong Kong
10. Karl Albrecht
Netwoth: $25.4 B - As of March 2012
Age: 92
Source: Aldi
Citizenship: Germany
Netwoth: $69 B - As of March 2012
Age: 72
Source: telecom
Citizenship: Mexico
2. Bill Gates
Netwoth: $61 B - As of March 2012
Age: 56
Source: Microsoft
Citizenship: United States
3. Warren Buffett
Netwoth: $44 B - As of March 2012
Age: 81
Source: Berkshire Hathaway
Citizenship: United States
4. Bernard Arnault
Netwoth: $41 B - As of March 2012
Age: 63
Source: LVMH
Citizenship: France
5. Amancio Ortega
Netwoth: $37.5 B - As of March 2012
Age: 75
Source: Zara
Citizenship: Spain
6. Larry Ellison
Netwoth: $36 B - As of March 2012
Age: 67
Source: Oracle
Citizenship: United States
7. Eike Batista
Netwoth: $30 B - As of March 2012
Age: 55
Source: mining, oil
Citizenship: Brazil
8. Stefan Persson
Netwoth: $26 B - As of March 2012
Age: 64
Source: H&M
Citizenship: Sweden
9. Li Ka-shing
Netwoth: $25.5 B - As of March 2012
Age: 83
Source: diversified
Citizenship: Hong Kong
10. Karl Albrecht
Netwoth: $25.4 B - As of March 2012
Age: 92
Source: Aldi
Citizenship: Germany
Did Forbes ask what their liabilities are?