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Points of Focus
- Bitcoin traded near $79,800 on Aug. 28, up about 2.7% from Monday’s $77,700 open.
- US spot Bitcoin ETFs added $1.13 billion over four sessions, extending inflows to nine straight days.
- A $6.44 billion Deribit options expiry coincided with a Core Lightning security warning.
Between Aug. 24 and Aug. 28, Bitcoin climbed from a Monday open near $77,700 to about $79,800 on Friday, leaving the five-day window up roughly 2.7%. The gain came with two failed pushes above $81,000 despite four more sessions of net US spot ETF inflows.
BTC reached about $81,240 on Aug. 25 and $81,360 on Aug. 28 before retreating below $80,000.
Bitcoin price rejects $81K inside major supply zone
Glassnode placed Bitcoin’s main overhead supply band between $81,000 and $86,000. Its Aug. 26 report identified the first self-custody cost-basis shelf near $80,800, dealer gamma turning negative near $82,300 and long-term holder supply concentrated from $83,000 to $86,000.
Both weekly attempts above $81,000 entered the lower edge of that band and reversed before BTC established support there. Glassnode also found that resting asks 1% to 10% above the market grew 41% over the final five days of its study window, while visible bids thinned 32% over seven days.
Squeeze into Supply: The Week On-chain 34 is live.
What stands between this recovery and the January high is one band of supply between $81K and $86K.
Bitcoin ran 26% off its mid-August low on a record short flush, and real money followed it up. https://t.co/JbJDUonsiq
— glassnode (@glassnode) August 26, 2026
Glassnode found futures open interest measured in BTC fell 11% during the squeeze that began with the Aug. 19 short-liquidation wave, while perpetual funding stayed near neutral. Price rose without a matching rebuild in leveraged long exposure, pointing to ETF and spot demand carrying more of the advance than a fresh futures chase.
Bitcoin ETF inflows reach $1.13B in four sessions
US spot Bitcoin ETFs recorded $337.6 million of net inflows on Aug. 24, followed by $314.3 million, $232.2 million and $242.3 million over the next three sessions. The four-day total reached $1.126 billion and extended the inflow streak to nine trading days.
BlackRock’s IBIT supplied $971.7 million of that four-day total, or about 86%. Fidelity’s FBTC moved the other way on Aug. 27 with $83.6 million of outflows. IBIT therefore accounted for most of the week’s net ETF demand despite the withdrawal from Fidelity’s fund.
Bitcoin options expiry keeps $80K in focus
Around 81,700 Bitcoin options worth $6.44 billion were scheduled to expire on Deribit at 08:00 UTC on Aug. 28. The expiry included 44,639 calls and 37,061 puts, producing a 0.83 put-to-call ratio.
Call open interest was concentrated at the $75,000 and $80,000 strikes, with more than $500 million in notional value sitting within 5% of spot price. Bitcoin was trading close to $80,000 ahead of settlement after rejecting $81,000 for the second time this week.
Core Lightning security warning reaches node operators
Core Lightning’s emergency security warning circulated publicly this week after developers confirmed that several AI-generated vulnerability reports identified real flaws. The team began preparing signed binaries while keeping technical details under a two-week embargo.
Operators unable to install the signed release were told to restart lightning with offline rather than shut the machine down. The setting disconnects the node from Lightning peers while allowing it to keep monitoring the Bitcoin blockchain for channel closures. The warning applied to Core Lightning software, with vulnerability details still under embargo.
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency prices are highly volatile. Always conduct your own research before making investment decisions.
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