Altcoin Season Index Has Crashed To 29 After Its September 2025 Highs
Back in September 2025, the Altcoin Season Index , which tracks the performance of the top 100 altcoins against that of Bitcoin, had reached a new yearly peak. This rise had triggered positive sentiment in the market, with calls for the altcoin bull run to finally begin. However, the tide has since turned, and hopes for another altcoin season have been dashed. Now, the index has crashed back downward, moving toward its yearly lows. Altcoin Season Index Falls To 39 From 78 The Altcoin Season Index on the CoinMarketCap website has declined to a score of 29, representing an over 50% crash from its September highs. Back then, the Altcoin Season Index had climbed to a score of 78 , suggesting that altcoins were in a bull market. However, this move was short-lived with the market crash that followed, especially in the month of October. This index takes into account how the top 100 altcoins by market cap have performed against the Bitcoin price over a 90-day period and uses it to score the...