Bitcoin ETFs Absorb Nearly $1 Billion on Monday Amid Short Squeeze

On Monday, September 21, Bitcoin (BTC) exchange‑traded funds (ETFs) recorded net inflows close to $1 billion. The inflow arrived after BTC had already spiked higher, driven by a short‑squeeze that lifted the price above $84,000 – a level not seen since January 31.

Short squeeze precedes ETF money

CoinGlass data shows the short squeeze liquidated roughly $262.3 million of short positions within an hour and pushed BTC to its brief peak. Spot ETF flows are reported once daily and reflect trades executed during the U.S. cash session, which opens after Asian and European markets are already active. Consequently, the price rise occurred before the same‑day ETF purchases could be recorded.

ETF flows have tracked price moves

Between September 9 and September 16, spot Bitcoin ETFs posted net outflows on five of six trading days, coinciding with a pullback in BTC’s price. Positive net inflows resumed on September 17 as the price began climbing again. Cumulative inflows to date exceed $56.98 billion, bringing total net assets across all Bitcoin ETFs to about $107.86 billion.

Concentration of holdings

The BlackRock iShares Bitcoin Trust (IBIT) holds approximately 785,640 BTC, more than four times the 176,510 BTC held by the Fidelity Wise Origin Bitcoin Fund (FBTC). This concentration suggests that a single large fund is a major driver of recent inflows.

Impact of ETF inflows on the rally

While ETF demand does not appear to have initiated the current price surge, continued inflows require market makers to purchase real BTC, potentially extending the rally. The available data does not confirm that ETFs can start a rally independently, but it does show that futures market activity preceded the Wall Street inflow on this occasion.