Weekly Index Highlights, September 29, 2025

Market Performance Update

Digital assets declined steadily over the recent week, with losses led by higher-beta majors. Bitcoin again anchored the mega caps with a relatively contained −3.1% week-on-week fall, while Ether dropped −4.4%, and Solana tumbled −9.7%. Among other large caps, Avalanche dropped −8.2%, Cardano −6.3%, Chainlink −2.8%, and XRP edged −2.6% lower. Despite the setback, Bitcoin maintains a mid-teens year-to-date (YTD) performance, while XRP is still ahead by approximately 28% YTD. By contrast, Avalanche and Cardano remain negative YTD, underscoring the year’s top-heavy leadership. Liquidity thinned into the weekend, and breadth narrowed, a familiar pattern in de-risking phases where altcoins typically lag Bitcoin.

Sector Analysis

Sector returns were broadly negative and tightly grouped: Finance, ticking +1.3% higher, was the lone gainer, while Culture lagged with a −4.6% fall. Most other sectors posted modest week-on-week declines, indicating risk reduction rather than a style or factor shock. The profile is consistent with investors favoring balance-sheet strength and transactional activity over attention-driven themes.

CF Staking Series

Staking indices were mixed: the ETH staking index rose 2.49% week-on-week with the associated reward rate up 6.31 bps, while the APT staking index was essentially flat at +0.01% (+0.08 bps). By contrast, the NEAR staking index declined 0.67% (−6.57 bps) and the SOL staking index fell 0.48% (−2.94 bps). On a year-to-date basis, NEAR remains slightly positive (approximately +0.25%), whereas APT, SOL, and ETH are negative YTD, highlighting that this section reflects staking carry and reward-rate dynamics, not token price performance.

Market Cap Index Performance

Moves were orderly across size tiers. CF Broad Cap Index (Diversified Weight) ground −4.3% lower week-on-week, while CF Large Cap (Diversified Weight) similarly, retreated −4.4%, trailing the most liquid composites. Meanwhile, CF Ultra Cap 5 fell −3.6%, and the CF Institutional Digital Asset Index was down −3.3%. Broad Cap and Large Cap continue to show year-to-date leadership concentrated at the top end. The relative resilience of the largest composites seems to be pointing, currently, to a preference for liquidity and index heavyweights during drawdowns.

Classification Series Analysis

Thematics softened across the board: CF Web 3.0 Smart Contract Platforms Index slid −6.5% week-on-week, CF DeFi Composite Index fell −4.5%, and CF Digital Culture Composite Index nudged −2.0% lower. Digital Culture remains deeply negative YTD (approximately −40%), and DeFi is still down by roughly a fifth YTD, signaling ongoing skepticism toward cashflow-light narratives. Momentum turned lower after a short-lived rebound in the prior week, leaving these cohorts more sensitive to funding pullbacks.

Volatility Analysis

Bitcoin implied volatility firmed whilst realized softened slightly: BVX rose by +1.69 points to 36.86, while realized slipped by −0.12 points to 24.34; widening the implied–realized gap. The move is consistent with a downside-skewed week, suggesting higher hedging demand rather than a volatility shock. This backdrop indicates participants are currently finding option carry to be relatively expensive for short-volatility positions, so instead they’re favoring selective hedges over outright vol selling.

Interest Rate Analysis

The data point to a moderate divergence of funding distribution across the curve over the week. The CF Bitcoin Interest Rate Curve eased at the front, with SIRB falling from 3.9% to 0.7%, and 1-month (1M) dropping from 2.1% to 1.7%. Potentially, that can be read as indicating some relief in crypto-native funding. The CF USDT Interest Rate Curve shifted higher, with 1-week moving from 7.0% to 8.7% and 1M rising from 6.9% to 8.7%. Again, potentially, this can be read as tighter dollar-stablecoin carry across short to intermediate tenors. In practice, tentatively, the overall mix can support participants seeking basis compression on BTC-linked rates, while it raises the hurdle for leveraged USDT funding strategies.