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How to read it. Each value is the Pearson correlation of daily log returns over the last 30 or 90 completed UTC days: 1.00 means the two coins moved in lockstep, 0 unrelated, negative in opposite directions. Beta is how much the coin has moved per 1% Bitcoin move. See every pair on the correlation matrix and volatility for 100 perps on the volatility screener.
Coins are the 20 with the most perpetual open interest that list a Binance USDT perp. Daily candles come from Binance's public futures API and refresh a few times a day. Not financial advice.