CoinMarketCap’s Altcoin Season Index rose eight points from the previous day to 42. The index measures how the top 100 coins by market capitalization, excluding stablecoins and wrapped coins, have performed against Bitcoin over the past 90 days. A reading of 75 or higher indicates altcoin season, meaning at least 75% of those coins outperformed Bitcoin, while the opposite is classified as Bitcoin season. Readings closer to 100 represent a stronger altcoin-season signal.