The Altcoin Season Index (ASI) measures the performance of altcoins against Bitcoin, indicating market trends. A score above 75% suggests an altcoin season, while below 25% indicates Bitcoin dominance. In June 2025, the ASI fell to around 12, showing that altcoins lagged behind Bitcoin. In mid-August 2025, the ASI increased to about 41, signaling a potential rotation. However, this still places the market firmly in Bitcoin's favor, suggesting that altcoins have not yet taken the lead. Bitcoin dominance serves as a broader metric of market movement and investor behavior toward altcoins.
The Altcoin Season Index (ASI) is a scorecard that evaluates how many altcoins have outperformed Bitcoin over the last 90 days. A score above 75% indicates potential altcoin season, while below 25% suggests Bitcoin remains dominant.
As of mid-August 2025, the Altcoin Season Index has risen to around 41, indicating a shift but still showing that Bitcoin is leading the market, not altcoins.
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