Bitcoin's price on Coinbase has remained slightly below Binance's for four consecutive days, with the Coinbase Bitcoin premium index at -0.0082% on Sept. 26. The negative reading indicates comparatively weaker prices on Coinbase and can reflect weaker buying or stronger selling pressure in the U.S. market. The index briefly turned positive at 0.0052% on Aug. 24, its first positive reading since May 19, after spending 97 consecutive days below zero.