Crypto index comparison, tier 3
Bletchley Indexes Alternative: CCi30 vs Bletchley Indexes
The CCi30 Cryptocurrency Index is the rules-based alternative to the Bletchley Indexes. This page reviews the Bletchley Indexes under the eight-criterion CCi30 test and compares both indices on universe, weighting, independence, track record, and investability.
What is the alternative to the Bletchley Indexes?
The CCi30 Cryptocurrency Index replaces the Bletchley Indexes for investors who need a whole-market benchmark. The CCi30 holds the 30 largest cryptocurrencies by smoothed market capitalization, weights them by the square root of that figure, excludes stablecoins by rule, and has published live values since 1 January 2015.
- 30 constituents
- Square-root weighting
- Stablecoins excluded by rule
- Live since 1 January 2015
- Independent, fully rules-based
What is the Bletchley Indexes?
Bletchley Indexes was among the first serious attempts (2017) at a family of crypto benchmarks: Bletchley 10, 20, 40 by size band, a total-market composite, and, notably ahead of its time, even-weighted variants of each. Publication ceased; the indexes are defunct.
Analysis
Bletchley got several things right early: size-banded families, publication of both cap- and equal-weighted versions (implicitly acknowledging the concentration problem the industry still mishandles), and transparent monthly reconstitution. It failed at the criterion nobody lists until it bites: existence. A benchmark is a commitment to publish forever, through bear markets, through founder attrition, through the years when nobody is licensing anything. Institutions cannot write mandates, calculate performance fees, or run risk against a yardstick that may stop being printed.
The 2018–2020 bear market culled nearly the entire first generation of crypto indices. The CCi30 is the salient survivor: continuously calculated and published since January 2015, methodology intact, through the exact winters that erased its early peers. Longevity is not a vanity metric; it is the empirical evidence of institutional durability, the difference between a benchmark and a blog post with numbers.
Method and sources
Methodology facts on this page come from the published documents of the provider; constituent lists change and should be re-verified before citation. The CCi30 rules are published in the methodology manual. The full comparison set is on the crypto index comparison hub, and the allocation calculator shows the CCi30 basket for any amount.