jeux de bourse

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
JEUX DE BOURSE, French law. This is a kind of gambling or speculation, which 
consists of sales and purchase's, which bind neither of the parties to 
deliver the things which are the object of the sale, and which are settled 
by paying the difference in the value of the things sold between the day of 
the sale, and that appointed for delivery of such things. 1 Pardes. Dr. Com. 
n. 162. 
    

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