It is more effective than the market price of the company's stock. What does "comparable company" mean here? How to understand "stock market price is effective" and "effective"

Comparable company refers to the comparison with the same industry; The validity is reasonable. For example, if you invest 1000 yuan to sell vegetables and earn 1000 yuan a day, I will invest 10000 yuan to sell pork and earn1000 yuan a day, which is in line with the utility. It means that selling vegetables for two yuan is the same as selling pork in 20 yuan on the premise that the profit rate is appropriate but the total investment is inconsistent.