• Applied Optoelectronics average pre-tax profit margin for 2012-09-30 was 0%, a 0% decline from 2012-12-31.
• Applied Optoelectronics average pre-tax profit margin for 2012-12-31 was 0%, a 0% decline from 2013-03-31.
• Applied Optoelectronics average pre-tax profit margin for 2013-03-31 was 0%, a 0% decline from 2013-06-30.

Pre-tax profit margin can be defined as earnings before taxes as a portion of total revenue.