Generated August 23, 2026.
Figures quoted in this analysis are from its generation date and may lag the live snapshot table above, which always shows the latest data.
Overview
ARKB and IBIT are both spot bitcoin ETFs launched in January 2024 that track the price of bitcoin directly. The key distinction is scale: IBIT has grown to $48.4B in assets, making it one of the largest bitcoin ETFs, while ARKB holds $2.16B. Both charge minimal fees and distribute no income, since bitcoin itself generates no yield. They differ slightly in expense ratio (ARKB's 0.21% versus IBIT's 0.25%) and carry nearly identical beta to bitcoin price movements.
How they differ
The largest difference is asset size. IBIT's $48.4B in AUM gives it deeper liquidity and tighter bid-ask spreads than ARKB's $2.16B, which matters if you're trading meaningful size. ARKB's 0.21% expense ratio undercuts IBIT's 0.25% by 4 basis points annually — a modest edge, but one that compounds over time on a non-income-producing asset where returns depend entirely on price appreciation. Both ETFs report nearly identical betas around 1.88, confirming they track bitcoin's volatility equally. ARKB lists its asset class as "Currency" while IBIT uses "Equity," a labeling difference that reflects their issuers' classification approaches but carries no practical implication for how the underlying bitcoin performs.
Who each is best for
ARKB: Fits investors who prioritize the lowest possible fee drag on bitcoin exposure and don't require the liquidity depth or brand familiarity of the largest bitcoin ETF.
IBIT: Fits investors who value the deepest available liquidity, lowest trading friction for large positions, and the iShares operational infrastructure, even at a slightly higher annual cost.
Key risks to know
- Bitcoin price volatility and leverage to spot price. Both funds carry a beta around 1.88, meaning they amplify bitcoin's inherent price swings. A 20% bitcoin drawdown translates to roughly a 20% drawdown in each fund's NAV with no diversification or stabilizing cash flows to cushion the decline.
- Regulatory and custody risk. Bitcoin's regulatory status remains unsettled across major jurisdictions. A material change in U.S. or international policy toward crypto asset ownership or trading could impair both funds' ability to hold or liquidate bitcoin at fair value, or reduce investor demand sharply.
- NAV convergence risk in a declining market. Both funds trade at prices tied to their net asset value (the spot price of their bitcoin holdings), but extreme market stress or custodial disruptions could create a gap between the fund price and underlying bitcoin value, particularly if redemptions spike.
Bottom line
If you want to minimize annual cost drag on a buy-and-hold bitcoin position, ARKB's 0.21% expense ratio offers a small but real advantage over IBIT's 0.25%. If you need reliable liquidity for frequent or large trades, or prefer the operational scale and brand of iShares, IBIT's $48.4B in assets and established market presence may justify the modest fee premium. Both are direct bitcoin plays with no income and high volatility — past performance doesn't predict future results, and bitcoin's regulatory and market risks apply equally to both.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.
