What is a Bitcoin ETF? How to query Bitcoin ETF inflow and outflow data

After the bleak market in March and April, the price of Bitcoin finally officially returned to more than 95,000. In this influx of funds, Bitcoin ETFs are the most important key force that cannot be ignored.

In particular, the single-day inflow on April 22 was as high as US$912 million, setting the second highest single-day capital inflow record in 2025. We can also see from the continuous increase in the future market that the inflow and outflow of ETFs has already had very important indicator significance.

This article will show you the latest data of Bitcoin spot ETFs in the United States, how to judge market trends from the data of holdings, market value share, and capital inflows, and how to use the four major monitoring tools to master the latest trends of Bitcoin ETFs!

What is a Bitcoin ETF: a fund that lets you buy Bitcoin in the stock market

Bitcoin Spot ETF is a fund-based product listed on the stock market. It mainly tracks Bitcoin's "spot" market price, and its fluctuations are highly synchronized with the spot market. Therefore, investors can indirectly hold or configure Bitcoin by purchasing such ETFs, without directly purchasing or custodying cryptocurrencies.

On January 10, 2024, the U.S. Securities and Exchange Commission (SEC) approved the listing application for 11 bitcoin spot ETFs, which not only greatly improved the market, but also meant that cryptocurrencies officially entered the mainstream financial market. These ETFs are issued by well-known asset management companies such as BlackRock, Fidelity, and Grayscale, providing a relatively convenient cryptocurrency investment pipeline for institutions and retail investors.

US Bitcoin ETF Position: Traditional institutions are scrambling to become Bitcoin super whale

As of May 1, 2025, the total holdings of the US Bitcoin spot ETF were approximately US$111 billion (BTC), accounting for 5.85% of the total Bitcoin stream market value.

Judging from the data, although the holdings of spot Bitcoin ETFs have fluctuated occasionally in the past year, they have increased steadily overall. Especially from the rapid expansion of positions in large ETFs such as BlackRock iShares Bitcoin Trust (IBIT) and Fidelity Wise Origin Bitcoin Fund (FBTC), it can be seen that institutional funds continue to influx.

Although cryptocurrency fund-type commodities have not been released in recent years, the inflow rate of capital in spot ETFs far exceeds that of futures ETFs, reflecting investors' preference for price transparency and low cost.

Why pay attention to Bitcoin ETF inflow data: Observe fund dynamics

As Bitcoin ETFs occupy the proportion of Bitcoin market capitalization gradually increases, the inflow and outflow performance of ETFs can be said to be closely related to the Bitcoin spot market. It not only has become one of the key data that investors pay attention to, but also an important indicator for judging market sentiment and investor confidence!

Definition of inflow and outflow

・Inflows: refers to investors purchasing ETFs, which will prompt these funds to "increase their holdings" in Bitcoin spot.

・Outflows: refers to investors selling ETF shares, which may lead to funds selling Bitcoin to cash out funds.

Therefore, capital inflows usually mean that traditional financial investors and institutional investors are bullish on the future market (especially, the flow of funds from IBIT and FBTC has the greatest impact on the market. If both have net inflows at the same time, the market has a higher chance of rising.); on the contrary, continuous capital outflows may indicate that traditional financial investors and institutional investors believe that the market will enter a adjustment cycle, or some investors may take profits in advance.

As Bitcoin gradually becomes one of the mainstream asset allocation options, the inflow and outflow data of ETFs combined with macroeconomic factors (such as FCC interest rate policy) and technical indicators can help investors adjust their strategies in the volatile cryptocurrency market in advance!

The obvious case of the impact of Bitcoin ETF inflow dynamics on the market

Next, let’s give a few cases to strengthen the above view and prove that the inflow and outflow data of Bitcoin spot ETFs have a significant impact on market trends.

・On January 11, 2024, the net inflow of ETFs on the first day of listing was US$620 million, driving the price of Bitcoin to rise rapidly from US$46,000 to nearly US$49,000, showing the market's enthusiasm for emerging investment pipelines.

・From November 11 to 15, 2024, the ETF had a net inflow of US$1.67 billion that week, driving the price of Bitcoin to approximately US$94,000, reflecting the strong support of institutional funds.

・In early April 2025, net outflows ranged from tens of millions to US$300 million for several consecutive days, and the price of Bitcoin fell from US$82,000 to US$75,000. The large outflow had a strong impact on market confidence.

・On April 22, 2025, the Bitcoin ETF quickly reversed its decline with a net inflow of US$930 million (the second highest record of the year), pushing the price back to more than US$90,000, showing the catalytic effect of large-scale inflows on the market rebound.

Inflow and outflow table sorting

Time point	ETF Fund flow	Bitcoin price changes	Market Influence
January 11, 2024	Net inflow of US$620 million (first day of listing)	Climb from $46,000 to nearly $49,000	Shows the market's enthusiasm for emerging investment pipelines, driving prices to rise rapidly.
November 11-15, 2024	Net inflows of US$1.67 billion in the week	To about $94,000	Reflecting the strong support of institutional funds, the price is close to the $100,000 level.
Early April 2025	Net outflows for several consecutive days, ranging from tens of millions to $300 million	Retracement from $82,000 to $75,000	The sharp outflow has had a strong impact on market confidence and prices have fallen significantly.
April 22, 2025	Net inflows of US$930 million (second highest record in the year)	Return to $90,000+	Large-scale inflows catalyzed a rebound in the market, quickly reversing the decline, and driving a significant rebound in prices.

These cases all show that the flow of ETF funds not only reflects investor sentiment, but also directly affects the short-term fluctuations and long-term trends of Bitcoin price!

How to query Bitcoin ETF Inflow and outflow data: SoSoValue, Arkham, CoinGlass, Farside Investors

To track the holdings and capital flows of Bitcoin spot ETFs, in addition to directly reading the professional interpretation of the Biyan Weekly Report, investors can also use several monitoring tools to grasp capital flows:

SoSoValue

SoSoValue provides past history and instant capital flow charts, including indicators such as net inflow, AUM and trading volume. The chart is quite intuitive and suitable for technical analysis enthusiasts.

Arkham Intelligence

Arkham is a native Web 3 tool that provides blockchain data analysis, tracking Bitcoin addresses and trading activities held by ETFs, and visualizing changes in positions and instant fund flows.

Advanced investors can also view the Bitcoin balance and historical changes of ETFs such as IBIT and GBTC through Arkham's "ETF position monitoring" function.

CoinGlass

CoinGlass data is updated frequently, providing statistics on daily holdings, net inflows and outflows and trading volumes of Bitcoin ETFs, as well as heat charts and discount charts, which can be used to conduct multi-level data analysis.

Farside Investors

The Farside Investors interface is quite intuitive, focusing only on the flow of ETF funds, the data is detailed and the update is relatively instant, and it is simple and easy to use, which is very suitable for retail investors.

The combination of the above tools can help investors fully grasp the dynamics of ETFs. For example, Arkham’s blockchain tracking function can complement CoinGlass’ capital flow data and have a deeper insight into the market!

Cryptocurrency industry insiders and venture capital firms’ views on Bitcoin ETFs

The view of industry insiders: Bitcoin ETF leads the ETF market, with prices exceeding 150,000

・Cathie Wood (ARK Invest): Wood predicts that Bitcoin spot ETFs will continue to attract more than $100 billion in funds over the next five years, pushing the price of Bitcoin to $150,000.

・Michael Saylor (MicroStrategy): Saylor believes that ETFs provide institutions with a compliant investment pipeline and will accelerate the popularity of Bitcoin as digital gold.

・Eric Balchunas (Bloomberg ETF analyst): Balchunas said that IBIT and FBTC performed better than most traditional ETFs in 2024 and are expected to continue to lead in 2025.

Venture Capital Institutions’ Views: ETFs continue to attract external funds and become mainstream asset allocation tools

・Bitwise: It is predicted that the net inflow of Bitcoin ETFs will reach US$35 billion in 2025, with a cumulative inflow of more than US$70 billion.

・a16z (Andreessen Horowitz): It believes that ETFs will promote the institutionalization of cryptocurrencies, and more digital asset ETFs may appear in the future.

・Pantera Capital: It predicts that the market share of spot ETFs will exceed 5% in 2026, becoming a mainstream investment tool.

However, many analysts remind that the centralization of ETFs may bring risks to the market. If a few large ETFs dominate the capital flow, it may affect the independence of Bitcoin prices. (But at the same time, it also highlights that it is very important to observe the trends of Bitcoin ETFs!)

Summarize

Bitcoin ETF is not only the main reason for the market's bear to bull market, but also may be one of the keys to the next ATH in this bull market. Investors can use some leading ETF capital inflow data, combined with macroeconomic and technical analysis to properly judge subsequent market trends.

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