Spot bitcoin exchange-traded funds (ETFs) recorded net inflows of $31.07 million on Sept. 28, local time, as a slowdown in institutional demand became clear.

According to blockchain media outlet CryptoSlate on Sept. 29, bitcoin is trading around $83,000 and has failed to break through a major supply zone.

The inflow extended a positive streak to 8 straight trading sessions, but it was the smallest over that period. Based on Sosovalue data, BlackRock's iShares Bitcoin Trust, known as IBIT, attracted $54.84 million and led intraday inflows. IBIT holdings rose by about 657 bitcoin, and total holdings moved back above 800,000 BTC for the first time since May 26.

Other products showed mixed flows. Grayscale's Bitcoin Mini Trust, known as BTC, recorded net inflows of $10.32 million, but $10.9 million left Fidelity's Wise Origin Bitcoin Fund, known as FBTC. Grayscale's GBTC saw net outflows of $23.19 million. The remaining products had little net inflow or outflow.

The net inflow extended a positive streak to 8 straight trading sessions, but it was the smallest over that span. Daily inflows neared $1 billion on Sept. 21, then declined from late last week and fell about 97 percent by Sept. 28.

Weekly flows were strong. Spot bitcoin ETFs pulled in $2.4 billion last week, marking the strongest weekly inflow of 2026 and the biggest weekly inflow since October 2025. Cumulative flows since the start of the year also turned positive again. They were in net outflow of about $5.8 billion through July, but recent inflows put monthly cumulative inflows at $2.73 billion and year-to-date net inflows at about $1.01 billion.

The issue is price. Bitcoin traded above $87,000 last week, then slipped back to the $83,000 range. Glassnode saw the zone with the thickest buildup of long-term holder supply as between $84,000 and $85,000. That means selling pressure could increase if long-term holders return to break-even or move back into profit.

During last week's upswing, ETF inflows played a role in absorbing that supply. At the time, the market saw activity from perpetual futures investors and profit-taking supply, but ETF buying absorbed some of it.

But conditions have changed. Assuming bitcoin at about $84,000, the Sept. 28 net inflow of $31 million is less than 400 BTC. By contrast, inflows that neared $1 billion early last week would be more than 11,000 BTC at the same price. ETF inflows do not exactly match spot buying on the day, but they clearly show how quickly marginal institutional demand has fallen.

In this situation, the market is looking to the next few sessions. If ETF buying returns, bitcoin could absorb supply in the $84,000 to $85,000 zone and open a path to further gains. If shrinking inflows continue or turn to net outflows, it could become harder to clear this price level, which has halted the recent uptrend.