Bitcoin News
Bitwise BITB September outflows vs Ark Invest ARKB

The volatility of second-tier funds
The September 9 session saw $120.2 million in net outflows across U.S. spot Bitcoin ETFs. ARK 21Shares’ ARKB led this retreat with $77.98 million in net redemptions, which accounted for roughly 65% of the day’s total. BlackRock’s IBIT recorded $19.53 million in outflows on that day, while Morgan Stanley’s MSBT recorded $4.49 million in inflows. The volatility in second-tier funds like ARKB creates more noise for retail than the steady allocations of IBIT. The September 15 session saw $450.33 million leave the funds. Fidelity’s FBTC led with $214.8 million in redemptions, while IBIT followed with $161.7 million. These large exits occurred after the Senate voted 49-50 to fail the Digital Asset Market Clarity Act. This legislative failure removed the most important policy catalyst for U.S. crypto markets in 2026. This exit on Tuesday followed a Monday where the same funds took in $159.9 million in net inflows. The September 9 damage arrived precisely as Bitcoin broke below $78,000 following a surge that saw the price hit $79,760 just fourteen hours earlier. This followed a strong start to the month where September 3 alone brought $730.9 million into the funds. The trailing seven days still show roughly $820 million of net inflows, meaning the two-session pullback erased less than a quarter of a single day’s creations. The month-to-date across six reported sessions sits at roughly $603 million of net inflows.
BITB and ARKB performance
Different fund structures produce different flow patterns. IBIT’s flows show directional persistence, while ARKB and FBTC oscillate between large creations and large redemptions. BITB and ARKB show different performance metrics.
| Metric | BITB | ARKB |
|---|---|---|
| Expense Ratio | 0.20% | 0.21% |
| 1-Month Volatility | 13.58% | 13.64% |
| 6-Month Volatility | 26.45% | 26.52% |
BITB maintains an average daily trading volume of $57 million. On September 9, ARKB experienced $77.98 million in redemptions, while BITB recorded $12.4 million in outflows. If you monitor these single-session reversals, you see the impact of traders reacting to price rather than long-term allocators. BITB surpassed $1 billion in assets under management less than five weeks after its launch. BITB has seen more than $877 million in net inflows since its trading debut on January 11, averaging $36 million per day. ARKB produced $77.98 million of redemptions on September 9, which followed an August 28 session where ARKB led a $201.8 million outflow with $115 million of redemptions alongside BITB at $50 million and IBIT at $33 million. While the total complex net outflows for the first two sessions of the holiday week reached $166.8 million, the concentration of selling in second-tier funds like ARKB suggests a trader-driven market rather than a structural shift in institutional allocation. Will the massive $3.8 billion inflow seen in August recover after these recent legislative and macro setbacks?
Macro pressure and regulatory failure
Macroeconomic pressures hit Bitcoin as prices fell to $75,942.32 on Thursday. Rising Treasury yields and oil prices above $100 per barrel fuel inflation concerns. The Federal Open Market Committee has a 92.9% probability of a 25-basis-point hike. The failure of the Digital Asset Market Clarity Act removed the primary policy catalyst for 2026. All Democrats voted against the motion, joined by four Republicans: Susan Collins, Josh Hawley, Jerry Moran, and Thom Tillis. This result erased the single most important policy catalyst for U.S. crypto markets in 2026. Bitcoin’s market capitalization is $1.52 trillion. The total 2026 net flows for the ETF complex show a deficit of $1.07 billion. In 2026, 54% of all sessions produced net redemptions. The August rally to $80,000 was built on ETF demand, but that demand stalled for eight sessions. On Tuesday, September 15, Bitcoin fell 3.3% from Tuesday’s open and spent the morning grinding between $75,500 and $76,000. Long liquidations totaled $288.44 million inside four hours on Tuesday. Bitcoin fell $1,849.51 to $77,092.32 on Thursday, a 2.34% decline, because it had printed $79,760 fourteen hours earlier.