Purchase of promissory notes

Q 1: There has been a recent increase in speculative ventures in selling and purchasing shares of companies like Makkah Construction and Development Co., Saudi Pharmaceutical Industries and Medical Appliances Corporation (SPIMACO), Food Production Co. (FPCO), Riyadh Construction Co., and other companies. Are these speculative ventures permissible?

A: There is nothing wrong in selling or buying shares in companies provided that these companies are known not to conduct usurious transactions and are real estate companies like construction, electricity and cement companies or other production companies. These companies should not be under construction. (Part No. 13; Page No. 324)  May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.