According to BlockBeats, data from Coinmarketcap reveals that the Altcoin Season Index is currently at 27, after previously dropping to 16 on May 31. This index indicates that in the past 90 days, approximately 27 out of the top 100 cryptocurrencies by market capitalization have outperformed Bitcoin.

The CMC Altcoin Season Index is a real-time indicator used to assess whether the cryptocurrency market is currently in an altcoin-dominated season. It is based on the performance of the top 100 altcoins relative to Bitcoin over the past 90 days.