Data: The Coinbase Bitcoin Premium Index has been in negative premium for three consecutive weeks, currently reported at -0.0331%

Coinglass data shows that the Coinbase Bitcoin Premium Index has been in negative premium for three consecutive weeks (21 days) since December 15, 2025, currently reported at -0.0331%. This index measures the difference between the Bitcoin price on Coinbase (a mainstream trading platform in the U.S.) and the global market average price. A negative premium typically reflects significant selling pressure in the U.S. market, a decline in investor risk appetite, increased market risk aversion, or capital outflows.