The Bletchley Index Series represented in the table below are scheduled for decommission on April 15, 2023. As of this date, no new price or return data will be produced. The full decommission of the Bletchley Index website, including all historical data, will occur on September 1, 2023.

Suitable replacements for the Bletchley Index Series can be found on Coin Metrics’ Community API or through CMBI offerings. Where Coin Metrics has found suitable replacements it is listed alongside the index in the table below. For indexes where there is no suitable replacement, you can find more information at

Table 1: Indices Scheduled for Decommission on April 15, 2023

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