Bitcoin fell alongside U.S. technology stocks on Friday as a sharp late-session selloff pushed the Nasdaq down 2.15% and sent the VIX volatility index 22% higher. The market move came two days before the 39th anniversary of Black Monday, the October 19, 1987, crash in which the S&P 500 lost more than 20%, although the anniversary itself was not presented as a cause of the latest trading.
Bitcoin recovered somewhat from its session lows but remained under pressure near $81,500, down about 1% over 24 hours in the intraday data reported by CoinDesk. The selling extended across technology, artificial-intelligence companies, crypto-related equities and other risk-sensitive assets, while oil prices and Treasury yields moved higher later in the session.
Stocks and bonds turn more volatile
The Nasdaq’s decline accelerated during the U.S. afternoon, reaching 2.3% less than 90 minutes before the close. The S&P 500 was down 1.25%, while the 10-year Treasury yield approached 5.112%. Earlier in the session, government bonds had attracted demand as equities weakened, but that support faded as yields reversed higher.
The VIX, commonly called Wall Street’s “fear gauge,” rose 22%. The index is designed to reflect expected volatility in S&P 500 options, so a sharp increase generally signals greater demand for protection or uncertainty among traders. Reports circulated about a market participant or group being forced out of positions, but the source said no such explanation had been confirmed.
Oil added to the market’s changing backdrop. Front-month West Texas Intermediate crude reached $99.40 a barrel, up 1.5% at one point, before advancing to $101.70, a 3.8% daily gain. That was a one-month high, and the reported price was 16% above its level 10 days earlier. There were reports that Saudi Arabia’s East-West oil pipeline had been targeted in an attack, though the market report did not establish that this was responsible for the price move. U.S. gasoline and distillate inventories were also described as remaining at decade lows, based on government data.
Crypto and AI-linked shares under pressure
Bitcoin initially declined with equities, briefly trading around $81,300 to $81,500. It later attempted to stabilize even as stocks extended their losses, prompting attention to whether the cryptocurrency could separate from the broader risk selloff. The move nevertheless left bitcoin about 1% lower over 24 hours in the reported session.
Crypto-linked stocks suffered larger losses. Strategy fell 9.2%, Securitize dropped 13.4%, Coinbase declined 3.5%, Circle lost 4% and Bullish fell 5.9%. The figures reflect the market closes cited in the source material.
Companies described as “neoclouds”—including former bitcoin miners that now provide data-center capacity for the artificial-intelligence industry—also resumed their decline after a short-lived rebound the previous day. CoreWeave fell 8% and was down more than 20% for the week. Hut 8, IREN, CleanSpark, Keel Infrastructure and Cipher Mining each lost roughly 6%.
Goldman Sachs said high-yield bond spreads had widened more sharply for AI-related borrowers than for companies outside the sector. Its analysis found a 25-basis-point widening for AI-related spreads during the week, while non-AI-related spreads were only slightly higher. The bank identified companies with major exposure to frontier AI laboratories and neoclouds as central to debate over funding costs. A wider credit spread means investors demand more yield to lend, increasing borrowing costs for the affected issuer.
Rate uncertainty and crypto market signals
The 10-year Treasury yield moved between about 5.07% and 5.13% during the session and was later reported near 5.125%, up 3.5 basis points. Fed Chair Kevin Warsh said he would not prejudge upcoming policy meetings and defended September’s rate increase as necessary to cool inflation. He also called the AI boom the most important development affecting global economies and said it could create price pressures, even as productivity gains eventually emerge.
Markets had largely reduced expectations for an October rate increase: the reported probability fell to 15% from almost 45% immediately after Wednesday’s consumer-price index report. The source also cited Catherine Chen, Binance’s head of institutional, who characterized the inflation-related crypto decline as a sentiment shock rather than a structural break. That was her assessment, not a guarantee about future prices.
Other crypto assets showed mixed signals. Zcash rose 11% to about $1,230, while ether and Solana each gained more than 3% in the earlier rebound described by CoinDesk. Yet flows into exchange-traded funds remained weak: the U.S. spot Zcash fund lost about $15 million, ether funds shed about $60 million and Solana funds lost nearly $10 million. Bitcoin ETFs recorded a net $5 million inflow, following a $261 million outflow on Wednesday.
Moneyiar market picture
Moneyiar data at 21:34 on October 17, 2026, showed bitcoin at $80,923.35, down 0.89% over 24 hours and 2.5% over seven days. Other tracked assets were also lower: Monad was $0.0216002, down 5.72% in 24 hours and 14.45% over seven days; Ore was $109.46, down 2.86% daily but up 3.85% weekly; and Ark was $0.172013, down 4.38% daily and 20.43% weekly.
