Track whether capital is rotating into altcoins: the share of the top-50 crypto assets (stablecoins and wrapped tokens excluded) outperforming BTC over the trailing 90 days.
Index = 100 x (top-50 assets beating BTC over the trailing 90 days) / (evaluated assets).
Universe: top 50 by market cap via CoinGecko, excluding stablecoins, wrapped and exchange-issued tokens.
Prices: Binance daily USDT spot closes.