A Bitcoin ETF’s value surged, but most investors didn’t ride that wave equally. If a one-shot investment had been placed in the iShares Bitcoin ETF Trust IBIT at its January 5, 2024 launch, the gains would look remarkable on the surface. Even after a recent pullback, the fund tallied roughly 46% annualized returns through November 26, 2025, mirroring bitcoin’s overall ascent.
However, not every investor benefited in the same way. People didn’t all jump in at once and double their money; they contributed at different times in varying amounts over the ensuing months. In total, about $63 billion flowed into the ETF by November 26, 2025.
Dollar-weighted returns reveal how timing and size of each buy and sell shaped the group’s results. By assembling the ETF’s daily assets and net flows from inception through late 2025, it’s possible to estimate that the average dollar invested earned around 11.2% per year. This is a solid return in absolute terms, but it falls far short of the ETF’s 46% annualized total return over the same period. The shortfall mainly stems from purchases and sales occurring at suboptimal times.
For additional context, the appendix includes the net asset and daily net flow data used to derive the dollar-weighted estimate.
To give this 11.2% annual figure some bearings: cash accounts for about 4.7% annually; investment-grade US bonds about 5.3%; US stocks around 23.3%; and a 60% stocks/40% bonds blend about 15.7% per year.
Root cause of the gap
What explains the sizable gap between the ETF’s total return and the dollar-weighted return? The ETF captured its biggest gains early on, before most assets had arrived. A table below illustrates estimated aggregate gains (losses) in dollars across different asset-size bands and days, showing how timing mattered.
Net Assets ($B) | Est. Aggregate Gain (Loss) ($M) | Number of Days | Percentage of Days
<1 | (13.3) | 11 | 2%
1-5 | 640.4 | 27 | 4%
5-10 | 1,357.6 | 16 | 2%
10-15 | 2,173.0 | 12 | 2%
15-25 | (1,498.4) | 217 | 31%
25-50 | 7,051.2 | 95 | 14%
50-75 | 4,727.1 | 178 | 26%
75-100 | (7,251.6) | 135 | 20%
(See the appendix for more on how these gain figures were derived.)
The ETF’s near-60% of dollar gains—roughly $4.2 billion—happened in the first 66 days, when the fund’s daily assets averaged about $4.8 billion and the price swung upward by more than 65%. Since then, about $3 billion more has been earned, but spread over a much larger asset base (average daily net assets around $49.2 billion), yielding a more modest cumulative return of about 24% (roughly 13.2% per year).
To further illuminate timing effects, the analysis also produced dollar-weighted returns for shorter windows beginning with inception and progressing month by month through late 2025. Even the period from inception to January 5, 2025 shows a gap of about 21 percentage points between total return and the average dollar return. That gap persisted in longer horizons as total returns moderated while assets continued to pour in.
Caveats from the fund manager
BlackRock, the ETF’s sponsor, offered three explanations for the observed difference between dollar-weighted and total returns. First, accessibility issues at launch meant the ETF wasn’t available on several major direct brokerages or advisory platforms, which delayed some demand and extended inflows over the next two years as platforms expanded access.
Second, the growth of derivatives and multi-leg trades created opportunities for large institutions to exploit price differences between bitcoin futures and spot bitcoin or to hedge positions linked to derivatives, structured notes, or notes referencing the ETF. While these trades may look unattractive when viewed from a single angle, they can yield net benefits when considered in total across positions.
Third, in-kind transfers—where big holders swap physical bitcoin for ETF shares—became available in July 2025, and have since amounted to over $3 billion in exchanges with major crypto investors. In these cases, the dollar-weighted return reflects the gains the investor realized after the swap, not the gains on the original bitcoin before the swap.
It’s worth noting that the second and third factors aren’t unique to this ETF; they could apply to any scenario where flows move between asset types beyond mutual funds and ETFs. In such cases, the fund can show its own dollar-weighted returns, but not necessarily the performance of the source or destination asset.
Bottom lines
The ETF has done its job well: it has tracked bitcoin closely and delivered strong total returns since its inception. The challenge is that investors appeared to join the party later, after the initial surge, which limited the average dollar’s gain. That said, the ETF has drawn money on about 80% of trading days since launch, signaling that investors generally stayed engaged. Still, the pronounced gap between dollar-weighted and total returns highlights the importance of staying committed over time; if invested participants continue to hold, their average dollar should gradually converge toward the ETF’s overall performance.
This analysis also serves as a caution against simple narratives. The ETF’s launch was hailed as a milestone for crypto market democratization, with some predicting that rising retail participation would push bitcoin higher. While bitcoin did rise in the period, the most dramatic gains occurred early, before much of the asset base formed. The story’s broad arc may be correct, but it also shows how timing can skew investment outcomes, even when the long-run direction is right.
Appendix and sources
The appendix provides the net asset and daily net flow figures used to compute the dollar-weighted return from January 5, 2024, to November 26, 2025. The figures align closely with BlackRock’s quarterly SEC filings through September 30, 2025, with minor timing differences. It also includes parallel calculations of aggregate net income and gains that match BlackRock’s reported totals.
Key references include BlackRock’s SEC filings for subperiods from 2024 through 2025 and related notes on fund flows and in-kind transfers.
If you’d like to discuss this analysis or explore different scenarios, share your thoughts below. Do you think the lure of early gains overshadows the benefits of staying invested, or does disciplined, long-term exposure still win out in the end?
