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Market short interest shifts in September reports

Indonesia faces its worst wildfire season since 2015, with El Niño-driven fires producing hazardous haze across Southeast Asia and prompting international aid offers.

13 stories6045 sourcesUpdated Oct 18, 2026

In this storyline:Indonesian Office of the Comptroller of the Currency Bank Secrecy Act Bank of America Alexandria Ocasio-Cortez Nexon United States Department of the Treasury Taiwan Semiconductor Manufacturing Company

Market short interest shifts in September reports — Photo: © IJR / Wikimedia Commons

Key developments

Oct 18, 2026
Indonesia faces its worst wildfire season since 2015, driven by El Niño drought and damaged peatlands.
Oct 18, 2026
Fires have produced hazardous air pollution, widespread respiratory illness and smoke that spread to neighboring countries.
Oct 18, 2026
School closures occurred in affected areas as officials work to restore degraded peatlands.
Oct 18, 2026
Indonesia approved offers of help from neighboring countries to fight severe forest and peatland fires.
Oct 18, 2026
The ASEAN weather center raised its highest haze alert for southern Southeast Asia as persistent Indonesian wildfires sent hazardous smoke across borders.

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Environment

Southeast Asia Haze Drives Oxygen, Purifier Sales Surge

Courts reported a 600% rise in air-purifier sales as haze drove AA Alive oxygen equipment sales up 35%; 26 Malaysian areas hit unhealthy API, Pasir Gudang at 182.

9 sources

Finance

Crypto Fund Short Interest Diverges in September

September short interest fell sharply for Grayscale’s Bitcoin Covered Call ETF, down 57.5%, and BlackRock’s iShares Staked Ethereum Trust ETF, down 60.1%. By contrast, short interest in Grayscale Ethereum Classic Trust more than doubled, rising 111%.

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Filings Show Advisers Shift ETF Holdings

Institutional investors reported mixed changes to ETF holdings in the third quarter: several firms cut positions in semiconductor funds, Invesco QQQ and an international developed-markets fund, while CoreCap Advisors opened a position in the Invesco RAFI U.S. 1000 ETF. Other investors added to or initiated holdings across the funds, reflecting varied portfolio moves rather than a uniform trend.

715 sources

Finance

Five ETFs See Divergent September Short-Interest Moves

September short interest moved sharply in both directions across five ETFs: it rose 131% for Pacer American Energy Independence and 176.2% for Pacer Swan SOS Moderate, while falling 70.8% for AXS Astoria Real Assets, 89.4% for ProShares Inflation Expectations and 65.9% for Pacer Trendpilot European. Despite the swings, short positions remained a small share of outstanding shares in each fund.

435 sources

Tech

House Democrats urge FAA to pause AI tool at three airports

Twenty-five House Democrats urged the FAA in October 2026 to pause SMART, the AI tool live since Sept. 21 at Reagan National, Dulles and BWI, until safety testing details are released.

24 sources

Finance

September Short Interest Rises Across Five Securities

Several unrelated stocks and ETFs reported sharp increases in September short interest, including TDK, TryHard Holdings, and four funds; short positions remained a small share of outstanding shares, with days-to-cover ratios generally low. TryHard also retained a consensus sell rating.

351 sources

Business

Annex Advisory cuts small-cap ETF stake by 94% in Q3

Annex Advisory Services’ third-quarter filings show it added to or opened positions in the iShares Global 100 ETF, LandBridge, Taiwan Semiconductor and the SPDR Portfolio S&P 500 ETF. It sharply reduced its holding in the SPDR Portfolio S&P 600 Small Cap ETF, selling about 94% of its shares.

34 sources

Finance

September Short Interest Swings Across Five Health Firms

September short interest rose sharply for Hansa Biopharma, Revelation Biosciences, Sunshine Biopharma and QHSLab, with reported increases ranging from about 198% to 518%. In contrast, Biofrontera’s short interest fell 68%.

420 sources

Finance

Farther Finance Reports Stakes Across Four ETFs

Farther Finance Advisors made a new $4.5 million investment in the Applied Finance Valuation Large Cap ETF and increased its holdings in the Vanguard Health Care, Defiance Quantum and iShares 7–10 Year Treasury Bond ETFs during the third quarter. Other institutional investors also reported purchases and stake increases in several of the funds.

674 sources

Finance

Reports Show Short Positions Shifting Across Markets

Nasdaq-reported short interest across its listed securities rose to 23.09 billion shares at Sept. 30, up from 22.52 billion two weeks earlier, while days to cover fell. Separate reports noted a sharp percentage increase in short interest for the Harbor Long-Short Equity ETF and growing leveraged crypto short bets; Sweden’s largest disclosed stock shorts also shifted, with Electrolux posting the biggest increase and AAK the biggest decrease.

1173 sources

Finance

September Short Interest Swings Across Four Stocks

September short interest surged in Cyabra, rising 2,457% to about 1.55 million shares, and Izotropic, up 1,938% to 17,142 shares. It fell sharply in ProShares Ultra Communication Services Select Sector, down 95.7% to 35 shares, and Spacsphere Acquisition, down 91.3% to 36 shares.

507 sources

Finance

Short Interest Surges 2,307% at One Firm While Dropping Sharply at Three Others

Kenedix Office Investment short interest surged 2,307% to 18,847 shares in September while HPS, Klöckner, Alpex, NEXON, and Karbon posted drops of 90% or more.

665 sources

Finance

Short Interest Plunges Across Five U.S. ETFs

Five U.S. ETFs saw short interest fall 91.7% to 99.1% as of Sept. 30; CFO dropped 99.1% to 1 share and cut its dividend to $0.0843.

474 sources