Tax-Loss Harvesting Hammers Market Leaders
Institutional capital staged a decisive exit to close out 2025. U.S. spot Bitcoin ETFs surrendered a net $348.10 million on December 31, capping the year with the steepest single-day outflow since the post-election volatility. The liquidity drain was broad-based, but the headline signal came from the market’s usual buyer of last resort: BlackRock.
Data from Bitcoin.com confirms BlackRock’s iShares Bitcoin Trust (IBIT) shed $99.05 million, leading the retreat. It wasn’t alone. Ark & 21Shares’ ARKB lost $76.53 million, while Grayscale’s GBTC and Fidelity’s FBTC bled $69.09 million and $66.58 million, respectively. The coordinated selling suggests institutional desks were aggressively harvesting tax losses before the fiscal year snapped shut.
The underlying message was clear: positioning remained cautious heading into the new year.
The Rotation Trade: Altcoins Bid
While Bitcoin and Ether liquidity evaporated (Ether ETFs lost $72.06M), a distinct rotation trade emerged. Smart money didn’t just leave; it moved. Solana and XRP products bucked the trend, posting net inflows of $2.29 million and $5.58 million respectively. This divergence hints that allocators are re-weighting portfolios for a high-beta 2026, betting on an alt-rotation while the majors cool off.
Bitcoin struggled to hold the $100,000 psychological level following the exits, while volumes across the ETF complex thinned significantly during the holiday session. Traders now look to the first full week of January to see if these outflows were purely tax-driven or the start of a deeper de-risking event.
