Philadelphia Fed Study Shows Bitcoin Traders React Faster to Whale Alerts Than Ethereum Users
Fed Study Reveals Faster Bitcoin Response to Whale Alerts
A working paper published by the Federal Reserve Bank of Philadelphia found that public notifications of large crypto transfers lead to sharper trading activity among Bitcoin wallets compared to Ethereum wallets. The study analyzed whale alerts, which are public announcements of transfers over $50 million, and observed how different wallet groups responded.
Main Findings from the Philadelphia Fed Research
- Bitcoin wallet participation increased most within 15 minutes after a whale alert, with small and medium wallets trading in the same direction as the alert.
- Ethereum participation stayed largely unchanged across wallet groups, except for some activity among the largest sellers after whale sells.
- The study shows associations between alerts and trading patterns, not proof that alerts caused the trades.
Details of the Working Paper
The Philadelphia Fed paper matched times from Whale Alert notifications with on-chain Bitcoin, Ethereum, and Wrapped Bitcoin transfers through the end of 2025. It defined a whale wallet as one that made a transfer worth more than $50 million, excluding exchange and smart contract wallets. After filtering, the study included 6,645 Bitcoin whale transactions and 5,075 Ethereum whale transactions.
For Bitcoin, after whale buys, small wallets increased buy participation by 14.81 percentage points, medium wallets by 23.72 points, and large wallets by 3.50 points within 15 minutes. After whale sells, sell participation rose similarly. This activity faded toward normal within an hour. Ethereum did not show the same broad response; participation remained stable, with only the largest sellers showing a clear effect after whale sells.
Volatility results differed by network. Whale alerts were linked to a temporary rise in Bitcoin volatility at short time frames, but by 24 hours, the effect reversed for Bitcoin and Ethereum alerts, while Wrapped Bitcoin alerts had no significant impact. Ethereum volatility was lower after alerts, suggesting large Ethereum transfers occurred during calmer periods.
Confirmed Facts from the Event Study
The study confirmed that non-whale Bitcoin wallets showed a sharp increase in trading activity in the direction of whale alerts, peaking in the first 15 minutes. Ethereum activity remained comparatively stable, with limited same-direction movement primarily among the largest seller cohort after whale sells. The research established patterns in wallet activity and volatility around public alerts.
Limitations and Unconfirmed Aspects
The study is observational, meaning it identifies associations but does not prove causation. Wallet-size groups are transaction-based proxies, and one person may control multiple addresses. Exchange activity was excluded, and the results may not generalize to all crypto markets. The findings do not confirm that alerts caused the observed trading behavior.
Why This Matters for Crypto Markets
The research highlights market-structure differences between Bitcoin and Ethereum. Bitcoin's quick response suggests public alerts may trigger faster individual trader reactions, while Ethereum's stable activity could reflect how transactions are aggregated through exchanges and smart contracts. This contrast persisted after Ethereum's shift to proof of stake, indicating other factors are at play.