US spot Bitcoin ETFs extended their inflow streak to six trading days on Monday, adding $337.6 million and pushing the total haul to roughly $2.26 billion over that stretch. August's total now stands at $2.72 billion, a record that easily tops the previous high of $1.97 billion set in April.
The August surge
Most of August's money arrived in a single week, with $1.92 billion flowing in as Bitcoin broke through $70,000 and kept climbing. The rally carried the token above $80,000 on Tuesday for the first time since May, a gain of about 28% for the month.
BlackRock's IBIT leads the pack
BlackRock's iShares Bitcoin Trust, or IBIT, captured roughly $1.33 billion in inflows last week and another $208.9 million on Monday — about 62% of that day's total. Fidelity's FBTC followed with $104.6 million. The two funds are doing most of the heavy lifting as investors pour money back into the space.
Still in the red for 2026
Despite the streak, the funds remain about $2.57 billion in net outflows for the year. The recent run has chipped away at the deficit, but it hasn't erased the earlier losses. That's a reminder of how far the market fell before this recovery.
Options and volume heat up
Trading activity is picking up too. Turnover for US spot Bitcoin ETFs tripled last week to $22.1 billion, up from $6.9 billion the previous week. Monday alone brought $5.36 billion in volume. On Wednesday, call-option volume on IBIT hit a record 1.58 million contracts, the third straight session above 1 million. The three-day shift in IBIT's call skew was the largest in at least two years, rising 0.5 points and more than tripling the average move since January 2025.
Assets within reach of $100 billion
The funds now hold $98.56 billion in assets, just $1.44 billion shy of the $100 billion mark. That's a swing of nearly $22 billion in six trading sessions, up from $76.6 billion in mid-August, mostly thanks to Bitcoin's climb from the low $60,000s to above $80,000. The last time assets were above $100 billion was in mid-May, before a sharp decline. The next test is whether the rally holds and the money keeps coming — the $100 billion mark is right there, but the year's net outflow is still a gap to fill.
