SPECULATION FORBIDDEN
Muhammad forbids speculation. �He who buys food grains should not sell it until he has taken possession of it� (3640). During Muhammad�s own lifetime, as the control of Arabia passed into his hands, his injunctions became state policy. SAlim b. �Abdullah reports: �I saw people being beaten during the lifetime of Allah�s Messenger in case they bought the food grain in bulk and then sold them at that spot before taking it to their places� (3650).
Because of their speculative nature, Muhammad also disallowed �futures� transactions. He forbade �selling ahead for years and selling of fruits before they become ripe� (3714). Transactions with the help of documents (probably the hundior bill of exchange system), were also made unlawful. The injunction was implemented with the help of the police. �I saw the sentinels snatching these documents from the people,� reports SulaimAn (3652).
author : ram swarup