Altcoins break from Bitcoin as 14-day correlation hits lowest since July 2025

Altcoins have stopped taking their cues from Bitcoin, at least for now. Their 14-day average correlation with Bitcoin has turned negative for the first time since July 2025.

Correlation is a scorecard for how closely two assets move together. It runs from +1, where they move in perfect lockstep, to -1, where they move in exactly opposite directions.

A reading near zero means the relationship is basically random. A reading below zero means that, on average, altcoins have recently tended to move against Bitcoin rather than with it.

The 14-day window matters too. It is a short lookback, so it captures recent behavior quickly but can also swing sharply on a handful of trading sessions.

Analytics platforms such as CryptoQuant and Sharpe Terminal track these correlation metrics. Traders lean on them to judge whether the market is moving as one block or splitting into separate stories.

In early May 2026, the 14-day average correlation between altcoins and Bitcoin fell to around 0.26-0.27, its lowest level since July 2025 at the time.

That reading was still positive, but weak. It pointed to a fragmented market where select altcoins were beating their peers, rather than a broad-based altcoin rally lifting everything at once.