Altcoin Season Builds Momentum, but Key Index Still Below 50

Key Insights
- Altcoin Vector’s Altcoin Impulse reached 93%, indicating strong short-term participation across altcoins.
- Broader Altcoin Season Indexes remain below 50, meaning a confirmed market-wide altcoin season has not yet arrived.
- Ethereum’s recent outperformance could support wider rotation, but rising Bitcoin dominance complicates the altseason thesis.
Altcoin season expectations are rising as more cryptocurrencies participate in the latest market rebound. Altcoin Vector’s proprietary Altcoin Impulse measure climbed to 93%, suggesting unusually broad short-term participation.
However, established Altcoin Season Indexes remain well below their confirmation thresholds. BlockchainCenter currently places its 90-day reading at 43, meaning fewer than 75% of eligible large-cap altcoins have outperformed Bitcoin during the period.
Altcoin Season Index Gains Strength As Market Breadth Expands
The latest move has put altcoin season back in focus as more coins begin to follow Bitcoin higher. According to Altcoin Vector, the Altcoin Impulse has surged to 93%, showing that the rally is no longer limited to a small group of altcoins.
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