It hasn’t been a December to remember for crypto.
Yet another stark reality check for crypto investors unfolded last week. After the early December rollercoaster of ETF flows, the market had seen a modest recovery of roughly $465 million across Bitcoin and Ethereum ETFs in the two-week stretch ending December 12, 2025.
That rebound, however, proved short-lived. The mid-December period, from December 15 to 19, 2025, saw U.S.-listed Bitcoin and Ethereum ETFs face a fresh setback, recording net outflows of approximately $1.13 billion, as top funds including BlackRock, Bitwise, and Ark posted the largest withdrawals.
Bitcoin ETF weekly flow summary
(Top issuers—Dec. 15–19, 2025)
| ETF Issuer | AUM (US$) | Inflows (US$m) | Outflows (US$m) | Net Flow (US$m) |
| BlackRock (IBIT) | $69.95B | 144.0 | -384.3 | -240.3 |
| Fidelity (FBTC) | $18.42B | 433.5 | -400.4 | +33.1 |
| Bitwise (BITB) | $3.52B | 0 | -115.1 | -115.1 |
| Ark (ARKB) | $3.42B | 0 | -100.7 | -100.7 |
| VanEck (HODL) | $1.47B | 0 | -39.2 | -39.2 |
| Grayscale (GBTC) | $14.99B | 0 | -27.5 | -27.5 |
| Grayscale (BTC) | $4.39B | 0 | -7.4 | -7.4 |
Total Inflows: ≈ $577.5M
Total Outflows: ≈ -1,074.6M
Net Flow: ≈ -$497.1M
Bitcoin ETFs saw a broad pullback after early December optimism. BlackRock’s IBIT was the largest contributor to outflows, losing $240.3 million, while Bitwise and Ark combined for –$215.8 million. Fidelity’s FBTC was a rare bright spot, posting modest inflows of $33.1 million, an unexpected performance despite the huge outflow of other big firms.
Source: SoSoValue
Ethereum ETF weekly flow summary
(Top issuers—Dec. 15–19, 2025)
| ETF Issuer | AUM (US$) | Inflows (US$m) | Outflows (US$m) | Net Flow (US$m) |
| BlackRock (ETHA) | $7.92B | 0 | -558.1 | -558.1 |
| Fidelity (FETH) | $1.87B | 0 | -16.7 | -16.7 |
| Bitwise (ETHW) | $602.4M | 0 | -13.0 | -13.0 |
| 21Shares (TETH) | $1.11B | 0 | 0 | 0 |
| Grayscale (ETHE) | ~$2.9B | 2.7 | -35.1 | -32.4 |
| Grayscale (ETH) | ~$2.3B | 2.9 | -20.2 | -17.3 |
Total Inflows: ≈ $5.6M
Total Outflows: ≈ -$649.5M
Net Flow: ≈ -$643.9M
Ethereum ETFs were hit even harder last week. BlackRock’s ETHA alone accounted for the bulk of outflows at –$558.1 million, while Fidelity’s FETH saw –$16.7 million leave and Bitwise’s ETHW recorded –$13.0 million. Smaller ETFs, such as 21Shares TETH, remained flat with no flows, while modest inflows into Grayscale’s ETHE ($2.7 million) and ETH ($2.9 million) barely offset the negative momentum.
Source: SoSoValue
Mid-December Profit-Taking Sets the Tone for BTC & ETH
After a strong rebound in early December, last week saw some ETF outflows as investors took profits and pulled back from high-cap crypto positions. Bitcoin and Ethereum prices responded accordingly. BTC drifted below $90,000 after briefly testing $94,000, while ETH hovered near $3,200.
BTC and ETH Chart Source: CoinGecko
The mid-December pullback suggests investors are reassessing allocations, particularly in large, liquid ETFs such as BlackRock’s IBIT and ETHA. While smaller ETFs like Fidelity’s Bitcoin fund saw inflows, the overall trend shows a consolidation phase rather than a surge in investor activity.
Looking forward, a combination of macroeconomic factors and market sentiment may continue to determine whether ETFs can regain momentum.
