16 Top Altcoins Outperform Bitcoin Over 90 Days as Altcoin Season Index Drops to 16

COINOTAG News, citing CoinMarketCap data, reports that the Altcoin Season Index stands at 16 as of December 28. After a high near 78 on September 20, the gauge now signals muted altcoin momentum. The CMC Altcoin Season Index is a real-time indicator of whether the market favors altcoins over Bitcoin based on the 90‑day performance of the top 100 altcoins against Bitcoin.

In the prior 90 days, approximately 16 projects within the top 100 cryptocurrencies by market cap outpaced Bitcoin on price, highlighting selective strength amid a cooler overall cycle. The data underscores that class-leading altcoins can outperform even when the broader altcoin sector remains modest.

Market participants should view the index as a tactical signal rather than a forecast. A low reading does not negate upside, but it encourages disciplined risk management and targeted exposure to the few names driving outperformance within the cryptocurrency market.