ETF BTC Issuer Market ShareTRINITY EXCLUSIVE
30-day rolling share of total net flows captured by each top-3 issuer. Smooths single-day noise and reveals concentration dynamics — when IBIT exceeds 60% share, the largest institutional allocators are driving the cycle.
Trinity exclusive model
This metric is a proprietary Trinity Insights model. Its formula, inputs, weights and parameters are NOT disclosed. The page documents only the output (bounded scale, interpretation zones, historical context). Access to the score and its time series is via the REST API and the MCP server, subject to the required tier.
What is it?
A 30-day rolling view of how the new-money inflow is being split between the three dominant issuers. Each line shows one issuer's share — in percent — of the combined IBIT/FBTC/GBTC 30-day rolling net-flow total. Smoothing over 30 trading days is deliberate: individual days are noisy (one large creation order can skew the daily breakdown dramatically), while a month-long window shows the underlying allocation regime. Because the three shares are defined against the three-issuer total only, they can exceed 100% or fall below 0% when one peer is in sustained outflows — that is a feature, not a bug: it highlights the rotation regime. This is the chart to consult when you want to answer 'who is winning the flow war right now?' without being fooled by a single big trading day.
How to read
Three percentage lines over time. IBIT (primary color), FBTC (secondary), GBTC (tertiary). When all three lines are positive and add to ~100%, the flow war is a normal three-way split. When one line sits above 100% and another below 0%, one issuer is capturing flows while another is losing them — the rotation regime. Watch the 60% threshold for IBIT: above that, the largest institutional allocators are driving the cycle; below, distribution is broader. Watch the 0% line: when GBTC crosses up through zero and stays there, the rotation era is clearly behind. Because this view is ratio-based, it is insensitive to the absolute size of daily flows — a 70% IBIT share on a quiet week or a noisy week tells the same concentration story. Vertical markers annotate structural events (spot launch, GBTC conversion - the mechanical driver of IBIT's market-share rise) - hover for source link.
Key zones
• Rotation regime (early months of 2024): IBIT's share well above 100%, GBTC's well below 0%. This is the mathematical signature of 'new money goes to IBIT while old money leaves GBTC.' Not a malfunction of the chart — a genuine flow regime. • Normalization (mid-2024): the three lines converge toward the standard 0-100% band as GBTC's outflows slow. This is when the category transitions from 'rotation' to 'growth.' • IBIT dominance band (60-75%): a persistent reading in this band means the BlackRock distribution network is the single most important channel for BTC institutional flows. • Competitive band (40-55% IBIT): indicates that Fidelity and smaller issuers are closing the gap, usually during slower flow periods when competition for mid-market allocations becomes visible. • GBTC positive territory: once GBTC's share stabilizes above zero, the trust-era shareholder migration is officially complete.
What to observe
• Crossings through 0%: a GBTC line rising through 0% is the cleanest indication that the rotation chapter has ended. Conversely, any temporary dip back below 0% means a new wave of rotation has begun (usually triggered by a fee cut by a competitor). • IBIT share trend: a rising IBIT share reflects increasing institutional concentration; a falling share reflects broader distribution. Both can be bullish, but they imply different underlying client bases. • FBTC crossover: when FBTC share crosses above GBTC share for the first sustained period, mid-market distribution has matured. • Volatility of the lines: noisy, whipsawing shares indicate a thin, easily-distorted flow environment (bad for narrative reliability). Smooth, gently-trending shares indicate a mature flow regime. • Divergence from cumulative chart: if IBIT's market share is falling while its cumulative line keeps climbing, absolute flows are still strong but competition is catching up.
Historical context
The market-share view is where the ETF Wars narrative is most legible. In traditional ETF categories, new entrants typically take years to chip away at incumbent share — iShares vs. Vanguard in index equities is the canonical slow-motion example. The BTC case collapsed that timeline to weeks because the incumbent (GBTC) was structurally inferior on fees (1.5% vs. 0.12-0.25%) and because all challenger products launched simultaneously with the same underlying asset. In the first 30 days, IBIT and FBTC combined captured north of 80% of net new flows. That speed of market-share reallocation has no direct parallel in other ETF categories and helps explain why early commentary framed the period in terms of disruption rather than routine competition.
Expert notes
⚠️ Trinity Exclusive Model — the 30-day rolling share is a Trinity computation applied to the daily per-issuer public disclosures stream. Two methodology notes: (1) the denominator is the sum across IBIT + FBTC + GBTC only, not the sum across all eleven issuers. That choice keeps the chart legible and focused on the three-way contest that accounts for >85% of category flows, but means a 100% sum across the three visible lines still omits the BITB/ARKB/BITO long tail. (2) When one of the three issuers has no flows or insignificant flows over the 30-day window, its share line can become erratic in ways that are mathematically valid but operationally unhelpful — if you see a >200% share or a < -100% share, interpret it as the window's denominator temporarily collapsing rather than as a real concentration indication.
Common mistakes to avoid
• 'Shares must add to 100%': they would if the three issuers' net flows were always non-negative. When one issuer's rolling net flow is negative and large, the denominator is reduced and the other shares can mechanically exceed 100%. That is a correct reading of the rotation, not an error. • 'A 70% IBIT share means BlackRock has 70% of total ETF AUM': No — it means BlackRock captured 70% of the recent 30-day rolling net new flows among the top 3. Cumulative AUM share is a different number. • Applying this chart to draw conclusions about the 'winners' of the whole ETF category: the chart only tracks three issuers. Broader issuer concentration dynamics require the daily-by-issuer chart with all eleven products. • Treating crossings in isolation: a one-week crossing is noise; a sustained (4+ weeks) trend-change is a regime shift.
Programmatic access
REST API
curl -sS \
'https://api.trinityinsights.io/api/v1/macro-intelligence/etf-btc-issuer-market-share/history?days=90' \
-H 'X-API-Key: $TRINITY_API_KEY'MCP server
{
"tool": "get_chart_value",
"metric_id": "etf-btc-issuer-market-share",
"timeframe": "1y"
}Required tier: pro. See the pricing grid for the tier list and the MCP documentation for multi-client configuration.
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Institutional disclaimer
Trinity Insights is an educational and analytical tool. The metric above does not constitute investment advice. Trinity Insights is not a Crypto-Asset Service Provider (CASP) registered under MiCA Regulation (EU) 2023/1114. See the full disclaimer.