• Arch Capital Group average net profit margin for 2011-09-30 was 0%, a 0% decline from 2011-12-31.
• Arch Capital Group average net profit margin for 2011-12-31 was 0%, a 0% decline from 2012-03-31.
• Arch Capital Group average net profit margin for 2012-03-31 was 0%, a 0% decline from 2012-06-30.

Net profit margin can be defined as net Income as a portion of total sales revenue.