The 'Altcoin Season Index' on CoinMarketCap, a comprehensive virtual asset information platform, recorded 39, the same as the previous day, indicating Bitcoin's market strength.

The Altcoin Season Index is calculated by comparing the price volatility between the top 100 coins by market capitalization (excluding stablecoins and wrapped coins) and Bitcoin.

The specific criteria are as follows: If 75% of the top 100 coins outperform Bitcoin over the past 90 days, it is considered an 'Altcoin Season'; otherwise, it is judged as a 'Bitcoin Season.' The closer the index is to 100, the more it is classified as an altcoin season.