If Pretax Margin increases over time:
An increasing Pretax Margin is usually a positive sign, showing the company is able to keep its operations costs low while generating earnings.
If Pretax Margin decreases over time:
A decreasing Pretax Margin is usually a negative sign, showing the company has not been able to keep its operations costs low while generating earnings.
If Pretax Margin stays the same over time:
An unchanged Pretax Margin indicates the company''s ability to keep its operations costs low while generating earnings has remained the same.