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Quantisnow Short Volume Ratio

Short volume ratio in September 2026

Last updated . Recomputed daily.

In September 2026, short sales made up 51.0% of FINRA-reported volume across US stocks (August: 50.2%), and 2,663 liquid stocks had a monthly short volume ratio above 50%.

Source: Quantisnow, Quantisnow Short Volume Ratio, September 2026

Key figures

Market short volume ratio
51.0%
Prior month: 50.2%
Highest daily ratio
53.2%
Prior month: 51.7%
Lowest daily ratio
49.1%
Prior month: 48.9%
Liquid stocks above 50%
2,663
Prior month: 2,505
Liquid stocks measured
4,385
Prior month: 4,431
Trading days
21
Prior month: 21

Highest short volume ratios (5M+ shares of monthly volume), September 2026

StockShort ratioReported volume
iShares MSCI ACWI ex US Index Fund (ACWX)87.7%94,696,135
FlexShares Credit-Scored US Corporate Bond Index Fund (SKOR)87.1%6,625,781
iShares Core Total USD Bond Market ETF (IUSB)83.1%167,825,279
South Bow Corporation (SOBO)82.8%5,668,951
Via Transportation Inc. (VIA)80.4%5,483,294
Piedmont Realty Trust Inc. (PDM)79.2%16,161,558
Voyager Technologies Inc. (VOYG)78.8%21,361,632
Thomson Reuters Corporation (TRI)78.7%10,770,896
Vail Resorts Inc. (MTN)78.0%8,730,896
PennyMac Mortgage Investment Trust (PMT)77.8%11,514,992
Canadian National Railway Company (CNI)77.4%12,661,743
Fulton Financial Corporation (FULT)77.2%7,343,144
iShares iBonds Dec 2029 Term Treasury ETF (IBTJ)77.2%6,520,262
Twenty One Capital Inc. (XXI)76.9%14,702,618
Old National Bancorp (ONB)76.1%32,810,206
Synchrony Financial (SYF)76.0%18,882,153
RB Global Inc. (RBA)75.6%11,244,839
Vaxcyte Inc. (PCVX)75.5%12,310,935
Central Bancompany Inc. (CBC)75.1%8,866,136
Globus Medical Inc. (GMED)75.0%11,722,136
Noble Corporation plc A (NE)75.0%8,207,197
Manhattan Associates Inc. (MANH)75.0%5,180,772
Williams-Sonoma Inc. (WSM)74.9%7,348,978
Uniti Group Inc. (UNIT)74.7%11,975,077
CVB Financial Corporation (CVBF)74.6%6,451,674

Methodology

FINRA publishes daily short sale volume for every security reported to its consolidated trade reporting facilities. Quantisnow ingests the file every trading day. The short volume ratio is short sale volume divided by total reported volume.

FINRA short sale volume is not short interest: market makers report many short sales while providing liquidity, so ratios around 40 to 50% are normal. The series is useful for relative comparisons across time and between stocks, not as a measure of bearish positioning on its own.

Monthly stock ratios are volume-weighted (sum of short volume over sum of total volume for the month). The ranking excludes stocks with under 5 million shares of reported monthly volume to avoid thinly traded names.

Figures are recomputed daily from the Quantisnow event database. The current month is marked as month to date until it closes; closed months are recomputed for a few days after month end to pick up late filings, then stay fixed.

Definitions for every column are in the JSON download.

Metric definitions

Market short volume ratio
(ratio): Sum of FINRA short sale volume divided by sum of total reported volume, all covered stocks.
Highest daily ratio
(highDay)
Lowest daily ratio
(lowDay)
Liquid stocks above 50%
(above50): Stocks with 1M+ shares of monthly reported volume whose monthly short ratio exceeded 50%.
Liquid stocks measured
(liquid)
Trading days
(days)

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Free to reuse under CC BY 4.0 with attribution to Quantisnow and a link to this page.

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Cite this dataset (APA)

Quantisnow. (2026). Quantisnow Short Volume Ratio, September 2026 [Data set]. Retrieved October 30, 2026, from https://www.quantisnow.com/data/short-volume/2026-09

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<figure style="margin:0;max-width:720px"><a href="https://www.quantisnow.com/data/short-volume"><img src="https://www.quantisnow.com/data/short-volume.svg" alt="Quantisnow Short Volume Ratio chart" width="720" height="340" style="width:100%;height:auto" loading="lazy"></a><figcaption style="font:12px sans-serif;color:#5b6470">Source: <a href="https://www.quantisnow.com/data/short-volume">Quantisnow Short Volume Ratio</a> by Quantisnow</figcaption></figure>

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