
The Coinbase Bitcoin Premium Index remained below zero for 90 consecutive days through Aug. 16, the longest such run on record, according to CoinGlass data.
The index was most recently at -0.1066%, after its negative run began on May 19. It tracks the difference between Bitcoin prices quoted on Coinbase Pro and Binance.
Readings below zero indicate that Bitcoin is priced lower on Coinbase relative to Binance. An extended discount can be associated with softer U.S. buying activity or stronger selling pressure, but the metric on its own is not evidence of sustained institutional outflows.

Source: CoinGlass