A significant disclosure from global market maker Jane Street has ignited intense debate within the cryptocurrency community. The firm reported holding approximately 20.3 million shares of BlackRock's iShares Bitcoin Trust (IBIT) as of December 31, 2025, making it one of the top institutional holders of the spot Bitcoin ETF. This position, valued at roughly $790 million, includes a purchase of 7.1 million shares worth $276 million in Q4 2025 alone.
This revelation has intersected with a persistent market pattern observed by traders: recurring Bitcoin price volatility and sell pressure around 10:00 AM Eastern Time, coinciding with the U.S. stock market open. Social media and trading communities are rife with allegations that Jane Street, or similar large entities, are orchestrating a "10 AM dump" strategy. The theory posits that these firms aggressively sell spot Bitcoin at the market open to trigger panic selling and liquidate over-leveraged retail positions, subsequently allowing them to accumulate more ETF shares at a discounted price.
Technical analysts point to the mechanical consistency of these drops, which often push prices into known liquidity zones where retail stop-loss orders are clustered, leading to cascading liquidations. The pattern has been noted in early November 2025 and throughout parts of Q2 and Q3 2025, continuing into early 2026.
However, it is crucial to note that these allegations remain unverified. No regulatory findings or official investigations have confirmed any coordinated market manipulation tied to Jane Street or any specific firm. Industry observers offer an alternative explanation rooted in market structure: as a major market maker and authorized participant, Jane Street's activity during the volatile U.S. open could reflect standard hedging, arbitrage between spot Bitcoin and ETF shares, or institutional flow alignment rather than deliberate suppression.
Despite the controversy, Jane Street's massive accumulation is viewed by some as a bullish long-term signal for institutional Bitcoin adoption. The situation highlights the growing influence of sophisticated trading firms in the ETF ecosystem and ongoing concerns about the structural disadvantages faced by retail traders in leveraged crypto markets.
