On 22 November 2019 at 12:00:05 UTC, BitMEX will be updating its indices across all products. The affected indices will be: .BXBT, .BETH, .BETHXBT, .BXRPXBT, .BBCHXBT, .BLTCXBT, .BEOSXBT, .BADAXBT and .BTRXXBT.
The updates will include new constituent exchanges and a change in index weights. These index weights are reviewed on a quarterly basis.
From today, the hypothetical values of the indices with the new weights will be published as the “NEXT” index family (Eg .BXBT_NEXT).