According to Woofun AI, U.S. spot Bitcoin ETFs recorded a single-day net outflow of $635.49 million on October 22, a withdrawal that occurred before BTC's price had fallen to the conventional threshold that typically triggers large-scale selling.
This "exit before the drop" capital movement broke a prior three-day streak of inflows, turning October's net fund flow into an outflow of approximately $174.5 million.
It is worth noting that just one day earlier, these ETFs had attracted $528.4 million in inflows, and on October 19 they logged their highest single-day inflow of $526.6 million since September 22.
The October 22 outflow was the largest single-day withdrawal since June 25, signaling that market sentiment had already reversed before prices deteriorated significantly.
The underlying reason lies in investors' sensitivity to relatively high price levels. Crypto market maker DWF Labs has been tracking spot Bitcoin ETF fund flows since January 2024, and its research established a key threshold: when BTC's price falls about 7% from its 20-day high, selling activity intensifies markedly.
The report shows that ETF investors can typically tolerate small declines, but once the drop approaches 7%, average daily fund flows flip from roughly $74 million in net inflows to $72 million in net outflows.
In 19 of the 24 historical scenarios studied by DWF, fund flow conditions deteriorated.
Data compiled by Woofun AI shows that based on Binance's daily closing prices, BTC on October 22 was down about 5.9% from its October 4 high of $86,530, meaning the 7% threshold sits at roughly $80,470.
BTC is currently trading near that level, closing at $81,416.09 on October 22, down 3.18% from the previous day, with a 24-hour decline of 3.41% to $81,297.
A more critical variable is the high degree of synchronization between ETF fund flows and price movements. DWF found that on 8 price peak days, fund flows remained positive 7 times.
October's data confirms this pattern: on October 21, when BTC's price rose, funds flowed in, and when the price fell, funds flowed out immediately.
Over the past week, BTC rose from $82,245.93 on October 15 to $84,093.42 on October 21, but hit resistance near $85,000.
As time passes, the 7% threshold may adjust dynamically. Once the October 4 high moves out of the 20-day statistical window, the next reference point will be the October 5 closing price of $85,766.87, which would lower the selling trigger threshold to about $79,760, unless BTC can first climb back above $85,766.87.
However, DWF's data also indicates that such selling behavior tends to gradually diminish; after past 7% declines, fund flows in the following week often approached zero, and could turn positive after another week.
Although the sample shows a clear pattern, the firm notes it is not yet sufficient to constitute absolute statistical proof.
The closing prices over the next few days will determine whether ETF capital outflows intensify further if BTC's price breaks below the threshold.
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