The Coinbase Bitcoin Premium Index has remained negative for three consecutive days, currently standing at -0.0049%, according to Coinglass data as of March 8. This marks a continuation of a trend seen throughout 2026, with only six days recording a positive premium. The index, which measures the price difference between Bitcoin on Coinbase and the global market average, is a key indicator of U.S. market sentiment and capital flows. A negative premium suggests increased selling pressure and reduced investor risk appetite in the U.S. market.