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This is to certify that your paper entitled «The effect of Trading volume on Bid-Ask spread of Islamic treasury bills with a Microstructural approach» was indexed with 0 pages, in the CIVILICA citation database, code COI:JR_IJFIFSA-8-4_002, after evaluation and approval of the referees of the "Iranian Journal of Finance Vol 8, Issue 4 , Year 2024.

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