The construction industry traditionally has had:.a. Lower profit margins significantly below many other industriesb. Has delivered profits on par with the average of the Standard & Poors 500 index companiesc. Has consistently outperformed the S&P 500 index companies

a. Lower profit margins significantly below many other industries

Explanation:

Only the retail industry has traditionally yielded lower profit margins than the construction business. In other words, the profit margin of the construction business is lower than almost all other industries.

The thing with construction is that it takes a long time to finish construction works and they are also relatively safe investments. Of course you can lose money, but there is no risk free industry.