LessonsBab al-Sarf: Mixed Currency Exchanges, Debased Coins and ObsolescenceQuiz

وَقَالَ أَبُ يُوسُفَ: عَلَيْهِ قِيمَتُهَا يَوْمَ الْبَيْعِ
Translation: Abu Yusuf said that the value of those coins on the day of sale is due.
This view maintains the transaction but replaces delivery of the obsolete stipulated currency with its value on the contract date. The price was recognised when the agreement was made; the valuation date is therefore the date of that agreement.

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Abu Yusuf: value on the contract date

Bab al-Sarf: Mixed Currency Exchanges, Debased Coins and Obsolescence

وَقَالَ أَبُ يُوسُفَ: عَلَيْهِ قِيمَتُهَا يَوْمَ الْبَيْعِ
Translation: Abu Yusuf said that the value of those coins on the day of sale is due.
This view maintains the transaction but replaces delivery of the obsolete stipulated currency with its value on the contract date. The price was recognised when the agreement was made; the valuation date is therefore the date of that agreement.