Bitcoin (BTC)-Nasdaq-100 Correlation Rose to 0.63 in 30-Day Sample

Bitcoin’s daily log return correlation with the Nasdaq-100 rose to 0.63 in a 30-date sample ending Oct. 26, indicating closer co-movement with U.S. stocks but not a shared cause. The calculation uses daily log returns across 30 matched U.S. market dates ending Oct. 26. A separate 30-date sample ending July 9 produced a 0.36 correlation. The later reading points to closer alignment in the two daily return series, but the short windows do not establish what caused the change. Correlation measures how consistently two series move in relation to each other; it does not say whether either asset gained or lost over a longer period. A positive reading can describe returns moving upward together or downward together. Separately, China’s technology-focused STAR 50 Index fell 39.8% from July 9 through Oct.

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