Bitcoinbtc#1

Correlation of the daily returns with the index's over 90 paired days, 2026-07-21 to 2026-10-18: 1 moves in step, 0 unrelated, below 0 opposite. The index return is the market-cap-weighted mean of the day's returns over the top 1000 without Bitcoin, stablecoins, gold tokens and wrapped or staked BTC and ETH

Daily return per 1% altcoin index return over the same 90 days: covariance with the index's returns divided by the variance of the index's returns

The price change from 2026-07-20 to 2026-10-18 relative to the index's over the same days: (1 + coin change) / (1 + altcoin index change) - 1. The index return is the market-cap-weighted mean of the day's returns over the top 1000 without Bitcoin, stablecoins, gold tokens and wrapped or staked BTC and ETH