The Shift in Bitcoin’s US Trading Dynamics
Bitcoin is currently navigating a period of concentrated price weakness during American trading hours, marking a reversal from previous months where Wall Street sessions typically drove market gains. Since September 21, data shows that while Bitcoin has advanced significantly during international hours, it has consistently struggled during the New York session. This trend is underscored by the "Coinbase Premium Gap," which recently hit a $64 discount, suggesting that selling pressure is coming predominantly from US-based platforms.
Concentrated Volatility and the Coinbase Discount
Analysis of the trading window between 9:30 a.m. and 4 p.m. EST reveals that Bitcoin lost over 3% of its value during these hours, even as it gained over 6% outside of them. However, researchers point out that this decline was not a steady erosion but was largely driven by two specific days of sharp sell-offs on September 30 and October 2. Outside of those two volatile sessions, the US trading window actually showed a slight positive return. This suggests that the current "US-session weakness" may be the result of specific high-impact events rather than a uniform, daily trend of divestment by American investors.
The Complicated Role of Institutional ETF Flows
While it is tempting to blame institutional selling for this downward pressure, US spot Bitcoin ETF data tells a more complicated story. On some days of significant price drops, ETFs saw massive net outflows, yet on others, Bitcoin fell even as hundreds of millions of dollars flowed into these funds. This divergence suggests that ETF investors are not the sole drivers of the session's weakness. Other participants—such as market makers, retail traders, or global investors active during US business hours—may be contributing to the negative premium on exchanges like Coinbase.
Looking Ahead: Identifying the Sellers
The persistence of the Coinbase discount will be a critical metric for market analysts in the coming weeks. If Bitcoin continues to lose ground during Wall Street hours while ETF outflows increase, it would provide a stronger case for a sustained deterioration in US demand. Conversely, if prices recover without a corresponding shift in ETF activity, the pressure may be coming from derivatives positioning or liquidity providers rather than long-term institutional holders. For now, the identity of the primary sellers remains unresolved, even as the timing of the pressure remains clearly linked to the American business day.
