The Coinbase Bitcoin premium index has remained negative for seven consecutive days, currently at -0.1184%, according to Coinglass data. Over the past month, the index has been negative for 29 out of 30 days. This index tracks the price difference between Bitcoin on Coinbase and the global average, serving as a key indicator of U.S. market capital flows and investor sentiment. A negative premium suggests lower Bitcoin prices on Coinbase compared to the global average, indicating strong selling pressure and potential capital outflows from the U.S. market.