TL;DR - Bloomberg Intelligence data as of July 20 shows the net cost basis for US spot Bitcoin ETF holdings is $64,114 per coin, while bitcoin trades around $82,249. On a per-unit basis, the average holder is in profit. But aggregate unrealized gains across the ETF complex have flipped to negative $16.33 billion - down from a peak of $86.32 billion in October 2025. The gap between per-unit profit and aggregate loss tells the story of who bought, who sold, and at what price.
Quick Answer: As of July 20, 2026, the net cost basis for US spot Bitcoin ETF holdings is $64,114, and the gross buy-only cost basis is $63,083. Bitcoin is trading near $82,249. Despite the per-unit profit, aggregate unrealized gains across the ETF complex have swung to -$16.33 billion, down from a peak of +$86.32 billion on October 6, 2025. The divergence means ETF holders who bought at higher prices and sold at lower prices locked in realized losses that now exceed the paper profits of remaining holders.
How Can ETF Holders Be in Profit Per Unit but Negative in Aggregate?
The Bloomberg Intelligence chart tracks two different metrics, and the distinction matters.
The top panel shows per-unit cost basis - the average price at which currently held ETF bitcoin was acquired. At $64,114 (net) and $63,083 (gross buys only), the average surviving position is sitting on roughly a 28% gain with bitcoin at $82,249.
The bottom panel shows aggregate unrealized dollar gains across the entire ETF complex. As of July 20, that number is -$16.33 billion.
These two numbers can move in opposite directions because cost basis only reflects shares that still exist. When someone sells ETF shares at a loss, those shares leave the calculation. The loss gets realized - it is real money gone - but the cost basis of remaining shares drops, because the expensive positions just exited.
In plain terms: the people who bought Bitcoin ETFs between $85,000 and $109,000 in late 2025 have largely sold. They took billions in realized losses. The people still holding bought at lower prices. The per-unit math looks good. The aggregate math shows the damage.
What Does the Timeline Show?
The aggregate gain peaked at $86.32 billion on October 6, 2025. Bitcoin was above $100,000 and ETF inflows were running at record levels. Then the unwind started.
From the October peak to the July 20 reading, the ETF complex swung from +$86.32 billion to -$16.33 billion in aggregate unrealized gains. That is a $102.65 billion reversal in less than 10 months.
The decline happened in two phases. First, bitcoin dropped from above $100,000 through the $85,000-$70,000 range between November 2025 and May 2026. Holders who entered near the top started selling, turning paper losses into realized losses. The first half of 2026 saw $5.4 billion in net ETF outflows - the first negative half-year since spot ETFs launched in January 2024.
Second, bitcoin broke below $60,000 in late June before recovering to the $62,000-$65,000 range in July. This pushed even mid-range buyers underwater. Glassnode estimated the average entry price for ETF investors at approximately $83,800 at one point - those positions are now either sold at a loss or deeply underwater.
Why Does the Gross vs Net Cost Basis Matter?
Bloomberg tracks two cost basis lines:
Gross cost basis (buys only): $63,083 - This is the volume-weighted average purchase price of every bitcoin ever bought through spot ETFs, excluding the effect of sales.
Net cost basis: $64,114 - This adjusts for redemptions. When low-cost-basis shares get redeemed, the remaining pool average cost goes up. When high-cost-basis shares get redeemed, it goes down.
The fact that net cost basis ($64,114) is slightly higher than gross ($63,083) tells you something: on balance, cheaper shares have been leaving the ETF complex more than expensive ones. Early buyers who got in at $40,000-$50,000 in Q1 2024 are taking profits, while late buyers who entered above $85,000 are holding underwater positions or have already sold at a loss.
This creates a compression effect. As the cheapest and most expensive positions exit, the remaining cost basis converges toward the middle - which is roughly where it sits now, right around bitcoin's price when it first broke below $60,000.
What Does This Mean for ETF Flows Going Forward?
The cost basis data creates a specific flow dynamic heading into August.
At $82,249, the average remaining ETF holder has a 28% buffer before going underwater. That buffer looked much thinner in early July when bitcoin was trading near $62,000 - just 3% below the net cost basis. The recovery from the June-July lows gave holders breathing room.
But the options market is pricing in bearish August seasonality. If bitcoin drops back toward $64,000 - the current net cost basis level - the ETF complex enters a zone where the average holder is breakeven. That is historically where capitulation selling accelerates, because breakeven is psychologically where undecided holders cut losses.
For Bitcoin ETF investors, the key question is whether the July recovery represents a genuine floor or a dead cat bounce heading into the weakest seasonal month. The cost basis data says the floor is around $64,000. Below that, the average remaining holder starts losing money, and the outflow pressure could intensify.
How Does This Compare to Corporate Treasury Holders?
The ETF cost basis diverges significantly from corporate treasury company positions. Strategy's average bitcoin purchase price sits around $76,020 across its 717,722 BTC position. At $82,249, Strategy is in profit on a mark-to-market basis, and recently boosted its USD reserve to $3.75 billion to cover preferred dividends through any downturn.
Metaplanet and other public companies holding bitcoin generally have lower cost bases than ETF holders because they accumulated earlier. The ETF complex absorbed most of its inflows during the 2024-2025 rally, which means its aggregate cost basis skews higher than corporate buyers who started accumulating in 2020-2023.
For holders evaluating whether to hold through a potential August drawdown, the Bitcoin ETF options guide covers hedging strategies using IBIT puts and covered calls. BlackRock's BITA covered call ETF offers a structural alternative for income-focused holders.
NOT INVESTMENT ADVICE. Nothing in this piece constitutes a recommendation to buy or sell any security. Do your own research.
Sean Ristau | @SeanRistau | 21Rates / The Daily Stack