Crypto Index Weekly
Crypto Index Weekly: Broad Market Holds Up as Macro Pressure Builds
Weekly · Sep 18, 2026
WeeklyIndicesMarket
Broad altcoin exposure stayed positive while the Nasdaq CME Crypto Index declined. CCi30 led verified benchmarks as higher rates and policy uncertainty weighed on large caps.
Weekly view. Crypto benchmarks delivered a mixed week. Broad altcoin exposure remained positive, while the more concentrated Nasdaq CME Crypto Index declined as higher interest rates, a stronger dollar and renewed US regulatory uncertainty weighed on large-cap assets.
Index performance
| Index | Latest verified level | 7-day change | Reading |
|---|---|---|---|
| CCi30 | 11,732.60 | +1.30% | Weekly leader among benchmarks with reliable history |
| CMC 100 | 156.07 | +0.08% | Broad market essentially unchanged |
| CMC 20 | 163.53 | −0.06% | Large caps narrowly underperformed |
| Nasdaq CME Crypto Index | 3,660.77 | −2.85% | Weakest verified benchmark |
| CI100 | 1,041.71 | N/A | Current recorded window: +4.17% |
| CI10 Blue Chip | 1,028.30 | N/A | Current recorded window: +2.83% |
CCi30 led the verified benchmarks. Its 1.30% gain points to better breadth below the very largest assets. By contrast, the Nasdaq CME Crypto Index fell 2.85%, although it remained 20.14% higher over 30 days. The move looks more like consolidation after the preceding rally than a uniform market reversal.
CMC benchmarks were almost flat. CMC 100 gained 0.08%, while the more concentrated CMC 20 declined 0.06%. The public CMC series currently contains only five accessible observations, so the comparison should be treated cautiously.
Data: CCi30 · Nasdaq CME Crypto Index · CMC 100 · CMC 20
CryptoIndex.ai benchmarks
CI100 and CI10 do not yet have a complete seven-day history under their present live methodology. Their displayed changes cover the available recorded window and should not be presented as full weekly returns.
- CI100: 1,041.71, up 4.17% during the available window.
- CI10 Blue Chip: 1,028.30, up 2.83% during the available window.
CI100’s latest session was supported by NEAR, UNI and ZEC, while FF, PI and XRP were the principal offsets. In CI10, ZEC, HYPE and XMR led the advance. These are latest-session contributors, not seven-day rankings.
Market regime
| Gauge | Reading |
|---|---|
| Bitcoin dominance | 58.9% |
| Ethereum share | 11.6% |
| Other cryptoassets | 29.6% |
| Altcoin Season Index | Approximately 40–42 |
| Fear and Greed Index | Approximately 56–57 · Greed |
Bitcoin dominance remains close to its 90-day average of 58.7%. At the same time, the Altcoin Season Index remains well below the 75 threshold required for an official altcoin season. The combination describes selective rotation rather than broad speculative expansion: individual altcoin groups are outperforming, but Bitcoin continues to control most of the market’s capital.
Sentiment sits in Greed, but not extreme greed. That is consistent with a market that remains constructive after its recent recovery while becoming more sensitive to macroeconomic and policy risks.
Market gauges: Bitcoin dominance · Altcoin Season Index · Fear and Greed Index
What moved the market
Monetary policy. The Federal Reserve raised its policy rate by 25 basis points to 3.75%–4.00%, while US Treasury yields approached or exceeded 5% at the long end. Higher yields increase competition for capital and tend to pressure long-duration and speculative assets. The Bank of Japan also raised rates, reinforcing the broader global tightening theme.
Regulation. Crypto-specific sentiment weakened after the US Clarity Act failed to advance in the Senate, leaving more of the regulatory framework dependent on federal agencies. Bitcoin fell after the setback, although separate SEC initiatives around tokenized securities provided a partial counterweight.
Rebalancing and methodology notes
No verified scheduled constituent changes were identified this week for CCi30, Nasdaq CME Crypto Index or CoinDesk 20.
- CI100 refreshes its composition and factor weights with each data pull.
- CI10 follows the ten largest eligible non-stablecoin assets and uses equal weights.
- CCi30 rebalances monthly.
- Nasdaq CME Crypto Index follows quarterly reconstitution.
- CoinDesk 20 rebalances quarterly.
CoinDesk 20 and Bitwise 10 were excluded from the performance table because a comparable, current official seven-day index return could not be verified from their public pages at the cutoff. CoinDesk confirms that its benchmark is capped market-cap weighted and rebalanced quarterly, but its public page did not expose a usable current index series.
Key takeaways
- Market breadth was better than headline large-cap performance. CCi30 rose while the Nasdaq CME Crypto Index declined.
- This was not an altcoin-season breakout. A score near 40 and Bitcoin dominance near 59% still describe a Bitcoin-centered market.
- Macro conditions became less supportive. Higher policy rates, Treasury yields and the stronger dollar created a more demanding backdrop.
- Sentiment remained constructive rather than euphoric. Fear and Greed stayed in ordinary greed, below extreme levels.
- The data infrastructure needs another week of history. CI100 and CI10 are producing useful live readings, but their present series is not yet long enough for a clean seven-day comparison.
CryptoIndex.ai research · Data cutoff: 18 September 2026