Trade repositories have been a solution adopted to foster transparency in other market segments, as in case of the OTC derivatives alongside the introduction of mandatory clearing. In the case of repos, however, it has to be considered that transactions are to a large extent already channelled to formal infrastructures for clearing and settlement purposes.
For instance, Central Securities Depositories (CSDs) already centralise in their systems, for their respective market, information relating to repo that can be derived from the settlement instructions. It could be argued that they de facto perform already a function that is similar to that of a trade repository.