Data from Coinglass shows that the Coinbase Bitcoin negative premium index — which measures the price difference between Bitcoin on Coinbase and the global average — has resumed its decline after a period of moderation from February to May. Since May 8, the index has weakened markedly, with the latest reading at -0.1323%.
Coinbase, being the largest regulated cryptocurrency exchange in the United States, often serves as a barometer for U.S. investor sentiment. A negative premium indicates that Bitcoin is trading at a discount on the platform compared to other international markets, typically reflecting heavier selling pressure in the U.S., a decline in risk appetite, rising risk aversion, or capital outflows.
The recent turnaround has dashed hopes of a sustained recovery in U.S. demand. During the February-to-May period, the negative premium had been steadily narrowing, suggesting that American buying interest was gradually returning. However, the renewed widening since early May signals that the relief was temporary and that U.S. market participants have once again turned cautious, with buying power remaining weak.
Although the current -0.1323% reading does not represent an extreme level historically, the rapid shift in direction is notable. If the negative premium persists or deepens, it could add downward pressure on Bitcoin’s price in the near term, as it would imply continued selling from U.S.-based spot traders. The index will remain a key gauge for monitoring shifts in U.S. investor risk appetite going forward, while also underscoring the structural differences in investor composition across regions.