CoinDesk Indices began a 24-hour reconstitution of five single-asset cryptocurrency price indices at 4:00 p.m. Eastern on January 28, 2023, changing which exchanges supplied prices for ether, bitcoin cash, litecoin, stellar lumens and zcash benchmarks.
The index provider had announced the schedule on January 13. The changes were not token listings, fund trades or protocol upgrades. They altered the venue set feeding composite reference prices, an operational layer used to value Grayscale single-asset trusts and other index-linked products. That made the review a market-structure event: the output could remain a single dollar price even as the markets contributing to it changed.
Five indices, six venue changes
The CoinDesk Ether Price Index, ETX, added Binance.US without removing a contributor. The CoinDesk Zcash Price Index, ZCX, similarly added Gemini.
Three other benchmarks made one-for-one substitutions. The CoinDesk Bitcoin Cash Price Index, BCX, replaced LMAX Digital with Cboe Digital. The CoinDesk Litecoin Price Index, LTX, replaced Bitstamp with Cboe Digital. The CoinDesk Lumens Price Index, XLMX, removed Binance.US and added Kraken.
CoinDesk said the modifications would be implemented over the 24 hours beginning at 4:00 p.m. Eastern on January 28. Its January 11 methodology notice described the reconstitution as implemented on January 29. Those statements are consistent: January 28 marked the beginning of a staggered window, not necessarily a simultaneous switch of every input at 4:00 p.m.
The January 13 notice said deletions resulted from an exchange failing the minimum liquidity requirement. It did not publish venue-level volume shares, the precise sequence of changes during the 24-hour window or before-and-after index values. Coinburn therefore cannot quantify how much any addition or deletion changed a benchmark.
Liquidity thresholds shaped the review
CoinDesk’s January 11 methodology update lowered the minimum volume share for an existing contributing exchange to 4% of total volume across eligible exchanges, from 5%. A non-contributing exchange could enter by reaching 10%, or 5% if it had appeared on the prior quarter’s watchlist. The earlier rule had required a non-contributor to reach 6% in the current quarter and 5% in the previous quarter.
The update also said CoinDesk would add a replacement between scheduled reconstitutions if an exchange deletion would otherwise leave fewer than three contributors. CoinDesk characterized these methodology changes as non-material and said no exchange was placed on the watchlist for the second-quarter 2023 review.
These thresholds were provider rules, not universal measures of exchange quality. Passing a volume test did not certify an exchange’s solvency, custody, compliance or resistance to manipulation. Failing it did not mean an exchange had stopped operating. The provider did not disclose enough data in the announcement for an outside reader to reproduce each eligibility decision.
Why benchmark plumbing mattered
A multi-venue index can reduce dependence on any single exchange, but its result still depends on eligibility rules, data quality, pair selection, calculation methods and the behavior of its contributors. Adding a venue can broaden the observed market; removing one can exclude prices that no longer meet the provider’s liquidity standard. Neither effect guarantees a higher or lower index level.
The changes also cut in different directions for the same venue. Binance.US joined the ether index but left the lumens index. Cboe Digital entered the bitcoin cash and litecoin indices. That asset-by-asset outcome shows that the review evaluated liquidity within particular markets rather than assigning one blanket status to an exchange.
No event-day token return, trading volume or causal market reaction is asserted here. The primary record establishes the index configuration and implementation window, not a measurable price effect.
Later filing confirmation
On February 2, 2023, Grayscale trusts filed Form 8-K reports with the Securities and Exchange Commission identifying January 28 as the period of report and confirming the relevant venue changes. Those later filings corroborate the preannounced implementation; they do not turn February 2 disclosures into January 28 news. The bounded conclusion is that a scheduled benchmark reconstitution began on January 28 and changed the market inputs behind five crypto price indices.
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