For this and the following
sections, one may compare ad-Dimashgi, al-Isharah ila mahasin
at-tijarah, tr. H. Ritter in Der Islam, VII
1952 a book by Frank V. Fischer appeared, entitled
Buy Low - Sell High: Guidance for the
General Reader in Sound Investment Methods and Wise Trade
Qur'an 51.58 (58).