Small Bitcoin Traders React Quickly to Whale Moves
A new study from the Federal Reserve Bank of Philadelphia reveals that small Bitcoin traders react swiftly to large transfers made by major holders, known as whales. The research, cataloged as WP 26-42, analyzed data from December 2017 to December 2025, covering multiple crypto market cycles. It found that small and medium Bitcoin wallets increased their trading activity significantly within 15 minutes of whale alerts, rising by 14.81 to 23.72 percentage points for buys and 12.95 to 29.52 percentage points for sells.
The study used on-chain data paired with public notifications from Whale Alert, focusing on transactions above $50 million. It excluded exchanges and smart contracts to zero in on individual large holders. Small wallet activity jumped from 18.6% to 33.2%, while medium wallets saw a rise from 33.8% to 57.9% after whale alerts. However, Ethereum traders showed little to no reaction to similar alerts, suggesting structural and informational differences between the two markets.
The paper noted that Bitcoin's simpler transaction structure might make whale moves easier to interpret as signals, unlike Ethereum's more complex activity involving exchanges and smart contracts. Volatility in Bitcoin spiked briefly after alerts, particularly after Wrapped Bitcoin (WBTC) alerts, while Ethereum volatility remained stable. The researchers emphasized that the study does not prove causation or assess the profitability of following whale moves.
The findings highlight the sell-side impact, with sell participation rising significantly after whale sell alerts. The study also noted cross-asset links, as Bitcoin volatility peaked after WBTC alerts, despite WBTC showing little direct trading response. The authors left open questions about whether alerts drive trades and if smaller wallets benefit from following whales.