On 19 September 2023 at 04:00:00 UTC, we will update our index weights at BitMEX. From today, the hypothetical values of indices with their new weights will be published as the “NEXT” index family (e.g. To better understand BitMEX indices, check out our BitMEX Index Methodology page. For the absolute laters, you can also follow us on Twitter, or read our blog and site announcements for the absolute latest. In the meantime, if you have any questions please contact Support who are available 24/7.