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Vanguard Mortgage-Backed Securities ETF (VMBS) Short Interest Ratio & Short Volume

Vanguard Mortgage-Backed Securities ETF logo
$44.54 +0.11 (+0.24%)
Closing price 03:59 PM Eastern
Extended Trading
$44.52 -0.01 (-0.03%)
As of 04:04 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Vanguard Mortgage-Backed Securities ETF Short Interest Overview

As of September 15, 2026, Vanguard Mortgage-Backed Securities ETF (VMBS) had a short interest of 2.82 million shares sold short, representing 0.82% of the public float. This marks a 10.10% increase in short interest since the prior report. The short interest ratio (days to cover) is 1.7, meaning it would take 1.7 days of the average trading volume of 1.70 million shares to cover all short positions.

Current Short Interest
2,818,981 shares
Previous Short Interest
2,560,314 shares
Change Vs. Previous Month
10.10%
Dollar Volume Sold Short
$127.62 million
Short Interest Ratio
1.7 Days to Cover
Last Record Date
September 15, 2026
Outstanding Shares
349,310,000 shares
Short Percent of Float
0.82%
Today's Trading Volume
2,415,458 shares
Average Trading Volume
1,695,822 shares
Today's Volume Vs. Average
142%
Short Selling Vanguard Mortgage-Backed Securities ETF?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

VMBS Short Interest Over Time

VMBS Days to Cover Over Time

VMBS Percentage of Float Shorted Over Time

Vanguard Mortgage-Backed Securities ETF Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
9/15/20262,818,981 shares $127.62 million +10.1%0.8%1.74 $45.27
8/31/20262,560,314 shares $118.11 million -17.8%0.8%1.77 $46.13
8/14/20263,112,709 shares $143.71 million +0.4%0.9%2.75 $46.17
7/31/20263,101,356 shares $142.85 million +190.0%0.9%2.33 $46.06
7/15/20261,069,571 shares $49.74 million -57.3%0.3%0.79 $46.50
6/30/20262,504,753 shares $117.25 million +49.8%0.7%2 $46.81
6/15/20261,671,594 shares $78.18 million -43.6%0.5%1.31 $46.77
5/29/20262,965,785 shares $139.12 million +21.6%0.9%1.99 $46.91
5/15/20262,438,204 shares $112.99 million +133.4%0.8%1.75 $46.34
4/30/20261,044,746 shares $49.01 million -65.4%0.3%0.77 $46.91
4/15/20263,022,967 shares $142.44 million +89.4%0.9%1.7 $47.12
3/31/20261,595,902 shares $74.93 million +375.1%0.5%0.89 $46.95
3/13/2026335,913 shares $15.77 million +71.4%0.1%0.22 $46.94
2/27/2026195,962 shares $9.38 million -75.6%0.1%0.13 $47.86
2/13/2026803,903 shares $38.35 million -67.6%0.3%0.53 $47.70
1/30/20262,481,262 shares $117.21 million -6.5%0.8%1.45 $47.24
1/15/20262,654,038 shares $125.38 million +149.4%0.8%0.89 $47.24
12/31/20251,063,987 shares $50.09 million -5.0%0.3%0.67 $47.08
12/15/20251,120,333 shares $52.70 million -77.3%0.3%0.74 $47.04
11/28/20254,927,117 shares $233.08 million +45.5%1.5%3.5 $47.31
11/14/20253,386,142 shares $159.01 million +267.4%1.0%1.97 $46.96
10/31/2025921,721 shares $43.47 million +25.6%0.3%0.31 $47.16
10/15/2025734,000 shares $34.62 million -23.5%0.2%0.4 $47.16
9/30/2025958,800 shares $45.03 million -25.7%N/A0.6 $46.96
9/15/20251,290,000 shares $60.98 million -56.4%N/A0.9 $47.27
8/31/20252,960,000 shares $138.00 million +102.7%0.9%2.2 $46.62
8/15/20251,460,000 shares $67.57 million +25.9%N/A1.1 $46.28
7/31/20251,160,000 shares $53.39 million +8.4%0.4%0.8 $46.03
7/15/20251,070,000 shares $48.92 million +6,893.5%N/A0.3 $45.72
6/30/202515,300 shares $709.00 thousand -98.6%1.4%0.3 $46.34
6/15/20251,100,000 shares $50.26 million +345.5%0.3%0.3 $45.69
5/31/2025246,900 shares $11.28 million -76.9%0.1%0.1 $45.67
5/15/20251,070,000 shares $48.86 million -10.8%0.3%0.3 $45.66
4/30/20251,200,000 shares $55.58 million -68.3%N/A0.3 $46.32
4/15/20253,780,000 shares $173.12 million +972.0%0.9%1 $45.80
3/31/2025352,600 shares $16.33 million -65.4%0.1%0.2 $46.31
3/15/20251,020,000 shares $46.90 million +24.8%0.2%0.5 $45.98
2/28/2025817,400 shares $38.00 million +115.4%0.2%0.4 $46.49
2/15/2025379,500 shares $17.35 million -70.8%0.1%0.2 $45.73
1/31/20251,300,000 shares $59.28 million -26.1%N/A0.5 $45.60
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1/15/20251,760,000 shares $79.55 million -33.8%N/A0.7 $45.20
12/31/20242,660,000 shares $120.60 million -17.1%N/A1.2 $45.34
12/15/20243,210,000 shares $146.95 million -66.2%N/A1.5 $45.78
11/30/20249,500,000 shares $440.42 million +389.7%N/A4.7 $46.36
11/15/20241,940,000 shares $88.37 million +55.2%N/A1.1 $45.55
10/31/20241,250,000 shares $57.26 million +88.3%N/A0.8 $45.81
10/15/2024663,700 shares $30.89 million +0.0%N/A0.4 $46.54
9/30/2024663,600 shares $31.33 million -19.4%N/A0.4 $47.21
9/15/2024823,700 shares $39.08 million +7.7%N/A0.5 $47.45
8/31/2024765,200 shares $35.83 million -17.3%N/A0.4 $46.82
8/15/2024925,100 shares $43.12 million -66.8%N/A0.5 $46.61
7/31/20242,790,000 shares $129.37 million +343.8%N/A1.7 $46.37
7/15/2024628,600 shares $28.83 million -5.3%N/A0.5 $45.87
6/30/2024663,600 shares $30.13 million +165.0%N/A0.5 $45.40
6/15/2024250,400 shares $11.45 million -67.7%N/A0.2 $45.72
5/31/2024776,300 shares $34.91 million +36.3%N/A0.6 $44.97
5/15/2024569,600 shares $25.88 million -53.7%N/A0.4 $45.44
4/30/20241,230,000 shares $54.39 million +173.3%N/A0.8 $44.22
4/15/2024450,100 shares $19.95 million +25.9%N/A0.3 $44.33
3/31/2024122,600 shares $5.59 million -80.8%N/A0.7 $45.61
3/15/2024637,500 shares $28.83 million +63.9%N/A0.4 $45.22
2/29/2024388,900 shares $17.63 million -72.6%N/A0.2 $45.34
2/15/20241,420,000 shares $64.48 million +198.7%N/A0.7 $45.41
1/31/2024475,400 shares $21.96 million -31.1%N/A0.3 $46.19
1/15/2024689,700 shares $31.93 million +14.8%N/A0.4 $46.29
12/31/2023600,800 shares $27.85 million -49.1%N/A0.3 $46.36
12/15/20231,180,000 shares $54.39 million +185.7%N/A0.5 $46.09
11/30/2023413,000 shares $18.50 million -33.6%N/A0.2 $44.80
11/15/2023621,500 shares $27.28 million -11.9%N/A0.3 $43.90
10/31/2023705,100 shares $30.09 million -11.6%N/A0.3 $42.67
10/15/2023797,200 shares $34.57 million -43.9%N/A0.4 $43.37
9/30/20231,420,000 shares $62.17 million +44.1%N/A0.9 $43.78
9/15/2023985,700 shares $44.06 million +0.4%N/A0.7 $44.70
8/31/2023982,000 shares $44.46 million +16.1%N/A0.7 $45.28
8/15/2023846,000 shares $37.82 million -30.1%N/A0.6 $44.71
7/31/20231,210,000 shares $55.42 million +12.0%N/A0.9 $45.80
7/15/20231,080,000 shares $49.57 million -12.9%N/A0.8 $45.90
6/30/20231,240,000 shares $57.03 million +0.8%N/A0.9 $45.99
6/15/20231,230,000 shares $56.79 million -60.2%N/A0.8 $46.17
5/31/20233,090,000 shares $142.79 million +2,402.0%N/A2.2 $46.21
5/15/2023123,500 shares $5.73 million -83.5%N/A0.1 $46.38
4/30/2023748,100 shares $34.91 million +236.1%N/A0.5 $46.67
4/15/2023222,600 shares $10.34 million +25.2%N/A0.2 $46.44
3/31/2023177,800 shares $8.28 million -59.3%N/A0.1 $46.55
3/15/2023437,100 shares $20.31 million -69.4%N/A0.3 $46.47
2/28/20231,430,000 shares $65.45 million +117.3%N/A0.8 $45.77
2/15/2023658,000 shares $30.40 million -64.4%N/A0.4 $46.20
1/31/20231,850,000 shares $87.12 million +222.5%N/A1 $47.09
1/15/2023573,700 shares $26.92 million -23.1%N/A0.3 $46.92
12/30/2022745,600 shares $33.94 million +41.5%N/A0.4 $45.52
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12/15/2022526,800 shares $24.68 million +87.7%N/A0.2 $46.84
11/30/2022280,600 shares $12.93 million -69.6%N/A0.1 $46.09
11/15/2022923,700 shares $42.00 million +254.9%N/A0.4 $45.47
10/31/2022260,300 shares $11.54 million -97.6%N/A0.1 $44.35
10/15/202210,720,000 shares $472.43 million No ChangeN/A5.8 $44.07
9/30/20223,150,000 shares $142.03 million +129.9%N/A2 $45.09
9/15/20221,370,000 shares $63.53 million +154.6%N/A0.9 $46.37
8/31/2022538,100 shares $25.59 million -47.8%N/A0.3 $47.56
8/15/20221,030,000 shares $50.31 million +20.5%N/A0.6 $48.84
7/31/2022855,100 shares $42.11 million -25.6%N/A0.5 $49.24
7/15/20221,150,000 shares $55.26 million +151.3%N/A0.4 $48.05
6/30/2022457,600 shares $21.88 million +277.3%N/A0.1 $47.81
6/15/2022121,300 shares $5.68 million -75.8%N/A0 $46.79
5/31/2022501,900 shares $24.39 million +22.9%N/A0.2 $48.60
5/15/2022408,400 shares $19.68 million -92.5%N/A0.1 $48.19
4/30/20225,410,000 shares $260.92 million +91.8%N/A1.7 $48.23
4/15/20222,820,000 shares $137.25 million +420.2%N/A1.2 $48.67
3/31/2022542,100 shares $27.16 million -19.1%N/A0.3 $50.10
3/15/2022670,000 shares $33.79 million +31.2%N/A0.3 $50.44
2/28/2022510,700 shares $26.27 million -69.8%N/A0.3 $51.44
2/15/20221,690,000 shares $86.41 million +834.2%N/A0.9 $51.13
1/31/2022180,900 shares $9.42 million -81.4%N/A0.1 $52.06
1/15/2022972,600 shares $50.65 million +362.9%N/A0.6 $52.08
12/31/2021210,100 shares $11.10 million -90.3%N/A0.2 $52.84
12/15/20212,160,000 shares $114.11 million +11.9%N/A1.7 $52.83
11/30/20211,930,000 shares $102.37 million -34.1%N/A1.6 $53.04
11/15/20212,930,000 shares $154.97 million +719.1%N/A2.6 $52.89
10/29/2021357,700 shares $19.00 million -53.0%N/A0.3 $53.11
10/15/2021761,000 shares $40.44 million +51.3%N/A0.8 $53.14

VMBS Short Interest - Frequently Asked Questions

Short interest is the volume of Vanguard Mortgage-Backed Securities ETF shares that have been sold short but have not yet been covered or closed out. As of September 15th, traders have sold 2,818,981 shares of VMBS short. 0.82% of Vanguard Mortgage-Backed Securities ETF's shares are currently sold short. Learn More on Vanguard Mortgage-Backed Securities ETF's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. VMBS shares currently have a short interest ratio of 1.7. Learn More on Vanguard Mortgage-Backed Securities ETF's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 0.82% of Vanguard Mortgage-Backed Securities ETF's floating shares are currently sold short.

Vanguard Mortgage-Backed Securities ETF saw a increase in short interest in September. As of September 15th, there was short interest totaling 2,818,981 shares, an increase of 10.1% from the previous total of 2,560,314 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

0.82% of Vanguard Mortgage-Backed Securities ETF's shares are currently sold short. Here is how the short interest of companies compare to Vanguard Mortgage-Backed Securities ETF: First Trust Low Duration Opportunities ETF (0.12%), iShares GNMA Bond ETF (0.18%), and iShares MBS ETF (1.54%).

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($75.21 billion), Invesco QQQ ($46.31 billion), iShares Russell 2000 ETF ($27.98 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($9.70 billion), Canadian Natural Resources Limited ($9.42 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($8.53 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.79 billion), and Financial Select Sector SPDR Fund ($7.74 billion). View all of the most shorted stocks.

Short selling VMBS is an investing strategy that aims to generate trading profit from Vanguard Mortgage-Backed Securities ETF as its price is falling. VMBS shares are trading up $0.21 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for Vanguard Mortgage-Backed Securities ETF occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of VMBS, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including VMBS, twice per month. The most recent reporting period available is September, 15 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like VMBS:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


Related Companies
Short Interest Tools

Short interest data for NASDAQ:VMBS is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 9/24/2026. FINRA publishes updated short interest twice a month.
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