CoinVoice has recently learned that Coinmarketcap data shows the Altcoin Season Index is currently at 89, an increase of 3 points from the previous day, reaching a new high for the year. This index indicates that in the past 90 days, approximately 89 of the top 100 cryptocurrencies by market capitalization have outperformed Bitcoin.
It is reported that the CMC Cryptocurrency Altcoin Season Index is a real-time indicator used to determine whether the current cryptocurrency market is in a season dominated by altcoins. This index is based on the performance of the top 100 altcoins in the past 90 days relative to Bitcoin. [Original link]