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ETF AUM (Per Fund)

Per-fund total AUM in USD

PropertyValue
CategoryETF Analytics
UnitUSD
Resolution1d
AssetsBTC
TierPro
API EndpointGET /v1/etf/ticker
Fieldaum

Overview​

ETF AUM (Per Fund) is the total market value of Bitcoin held by a specific ETF fund, denominated in USD. It is calculated by multiplying the fund's current BTC holdings by the spot price of Bitcoin. AUM is the primary measure of a fund's size and reflects both the quantity of BTC held and the current price level.

Formula​

1165208 \text{AUM}{t} = \text{BTC Holdings}{t} \times P_{t} 1165208

Where {t}istheBTCspotpriceondateis the BTC spot price on date and BTC Holdingst\text{BTC Holdings}_{t} is the number of Bitcoin held by the fund on that date.

Interpretation​

  • Rising AUM: The fund is growing — either via net BTC inflows (new investor capital), BTC price appreciation, or both.
  • Falling AUM: The fund is shrinking — net redemptions and/or falling BTC price reduce the total dollar value of holdings.
  • AUM diverging from holdings: When AUM rises faster than BTC holdings, price appreciation is the primary driver.
  • AUM convergence across funds: Competing funds approaching similar AUM signals a competitive rebalancing of institutional capital.
  • Large AUM funds: Tend to have higher liquidity and lower tracking error; preferred by institutional investors.

Use Cases​

  • Fund size comparison: Rank ETFs by AUM to identify market leaders (e.g., IBIT vs FBTC vs GBTC).
  • Capital rotation tracking: Monitor which funds are gaining AUM share during different market phases.
  • Liquidity proxy: Larger AUM generally correlates with tighter bid/ask spreads and higher daily trading volume.
  • Market impact analysis: A fund with 0B+ AUM purchasing BTC can have measurable impact on spot price.

API Usage​

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.blocklens.co/v1/etf/ticker?start_date=2024-01-01&end_date=2024-12-31&limit=365"