GBTC vs IBIT: fee drag and 2026 net returns

The cost of legacy exposure

Grayscale Bitcoin Trust (GBTC) fell 27.08% in 2026 so far. IBIT fell 26.77% over the same period. Bitcoin itself fell 26.15%. These figures confirm the fee gap matters. GBTC charges a 1.50% expense ratio. IBIT costs 0.25%. In 2024, IBIT returned 89.87% while GBTC returned 82.78%. For 2025, IBIT returned -6.41% and GBTC returned -7.65%.

Higher fees drain returns.

Ticker	Fund Name	Issuer	Expense Ratio
IBIT	iShares Bitcoin Trust	BlackRock	0.25%
FBTC	Fidelity Wise Origin Bitcoin Fund	Fidelity	0.25%
GBTC	Grayscale Bitcoin Trust	Grayscale	1.50%
ARKB	ARK 21Shares Bitcoin ETF	ARK/21Shares	0.21%
BITB	Bitwise Bitcoin ETF Trust	Bitwise	0.20%

GBTC trailing the spot coin by 0.93% this year demonstrates the drag. Higher costs force the trust to sell more Bitcoin to pay the sponsor. This creates a performance gap between GBTC and lower-cost funds like IBIT or FBTC. IBIT holds $66 billion in assets, which dwarfs the $14 billion held by Fidelity’s FBTC. IBIT also maintained a positive three-month net flow of $2 billion despite the recent volatility. The verdict: GBTC underperforms.

June’s massive exodus

The market experienced a violent shift in early June 2026. US spot Bitcoin ETFs saw $3.4 billion in net outflows during a single week. IBIT lost $980 million in that period. This loss included a single-session hit of $448 million. A separate $1.29 billion dark-pool block trade involving 29.2 million shares at roughly $43 apiece also occurred.

GBTC lost $1.2 billion.

Despite holding less than 15% of the category’s aggregate assets, GBTC accounted for 35% of the total weekly outflow. This disproportionate damage occurred because investors shed expensive wrappers first. Many institutions established positions in the $52,000 to $58,000 range during the first quarter of 2026. They chose to lock in profits as rising Treasury yields and crude oil near $97 shifted the macro outlook. The rotation moved capital into AI equities where momentum and earnings live. Even with these outflows, Bank of America boosted its IBIT holdings to 972,590 shares worth roughly $37 million.

Did the macro shift trigger this?

Tax realities and phantom income

Spot Bitcoin ETFs use the grantor trust structure. Because the trust sells Bitcoin to cover the annual sponsor fee, this sale creates a taxable gain or loss for you even if you never sell a single ETF share. This creates phantom income.

The trust reports these sales on a grantor trust tax information statement. You must use this to calculate your share of the gain or loss on Form 8949. Brokers often report the proceeds with a blank basis. If you ignore these small lines, you risk an automated mismatch with the IRS.

It creates phantom income.

Fund sponsors publish these statements on their tax documents pages each year so shareholders can calculate their share of the expense-sale gain or loss. You should check your statements to ensure your Form 8949 matches the per-share tables provided by the issuer. IBIT, FBTC, and GBTC all use this same structure.