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Are you sure its not another article in the same site the source you cited is?
And what do you mean by "recent"?

Don't know, I received the info from my friend (bank manager).

Well, in any case, the information you are providing is wrong in different levels, the % of banks that plan to develop their own blockchain based business "in the next 3 years" is 65%. And the IBM study you are citing is 2 and a half years old....
So the information you are providing is incorrect and corrupted.