Coinbase Bitcoin Premium Index Extends Longest-Ever Negative Streak to 50 Days

The Coinbase Bitcoin Premium Index has extended its longest-ever period below zero, remaining negative for 50 consecutive days since May 19, according to data from Coinglass.

The index was recently recorded at -0.0742%, marking a new low point in its negative streak and surpassing the previous record of 40 consecutive negative days between January 16 and February 24, 2026. The current run has also exceeded the roughly 30-day decline seen during the “10/25 crash.”

The continued negative readings indicate sustained weakness in Coinbase’s Bitcoin price premium relative to other exchanges, a trend historically linked to weaker U.S. institutional buying or short-term market pressure.

Source: Coinglass