An evaluation of South Korea's top 20 conglomerate groups has found that their corporate governance is below a passing grade.
 
The Korea Corporate Governance Service said Friday that the average score of the groups was 25-point-nine out of 100.
 
Hanjin scored the lowest at 16-point-eight as the holding company grants a large amount of credit to its subsidiaries and has a low dividend rate.
 
Hyosung, Hyundai, Daelim and Kumho Asiana also had low scores.
 
Doosan had the highest score at 40-point-six for providing an appropriate level of shareholder protection.