ProShares UltraShort Nasdaq Biotechnology (BIS) Short Interest Ratio & Short Volume $17.02 -0.36 (-2.07%) As of 03:59 PM Eastern Add Compare Share Share Short Interest Stock AnalysisChartDividendHoldingsOptions ChainOwnershipShort InterestTrendsBuy This Stock ProShares UltraShort Nasdaq Biotechnology Short Interest DataProShares UltraShort Nasdaq Biotechnology (BIS) has a short interest of 7,200 shares, representing 4.77% of the float (the number of shares available for trading by the public). This marks a -24.21% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.6, indicating that it would take 0.6 days of the average trading volume of 11,814 shares to cover all short positions.Current Short Interest7,200 sharesPrevious Short Interest9,500 sharesChange Vs. Previous Month-24.21%Dollar Volume Sold Short$136.66 thousandShort Interest Ratio0.6 Days to CoverLast Record DateMay 31, 2025Outstanding Shares170,000 sharesShort Percent of Float4.77%Today's Trading Volume12,881 sharesAverage Trading Volume11,814 sharesToday's Volume Vs. Average109% Short Selling ProShares UltraShort Nasdaq Biotechnology? Sign up to receive the latest short interest report for ProShares UltraShort Nasdaq Biotechnology and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartBIS Short Interest Over TimeBIS Days to Cover Over TimeBIS Percentage of Float Shorted Over Time ProShares UltraShort Nasdaq Biotechnology Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/31/20257,200 shares $136.66 thousand -24.2%4.8%0.6 $18.98 5/15/20259,500 shares $189.15 thousand +31.9%5.6%0.8 $19.91 4/30/20257,200 shares $129.10 thousand -5.3%N/A0.6 $17.93 4/15/20257,600 shares $153.60 thousand -8.4%4.4%0.6 $20.21 3/31/20258,300 shares $154.71 thousand +18.6%4.2%0.7 $18.64 3/15/20257,000 shares $120.19 thousand -10.3%3.5%0.6 $17.17 2/28/20257,800 shares $129.64 thousand +9.9%3.9%0.6 $16.62 2/15/20257,100 shares $117.65 thousand -17.4%3.6%0.6 $16.57 1/31/20258,600 shares $142.42 thousand -27.1%N/A0.7 $16.56 1/15/202511,800 shares $213.34 thousand -71.8%N/A1 $18.08 Get the Latest News and Ratings for BIS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for ProShares UltraShort Nasdaq Biotechnology and its competitors with MarketBeat's FREE daily newsletter. 12/31/202441,800 shares $760.34 thousand +305.8%N/A3.3 $18.19 12/15/202410,300 shares $178.71 thousand +22.6%N/A0.8 $17.35 11/30/20248,400 shares $132.97 thousand -2.3%N/A0.6 $15.83 11/15/20248,600 shares $152.05 thousand +32.3%N/A0.6 $17.68 10/31/20246,500 shares $103.74 thousand -4.4%N/A0.5 $15.96 10/15/20246,800 shares $101.25 thousand -20.0%N/A0.5 $14.89 9/30/20248,500 shares $127.84 thousand -31.5%N/A0.6 $15.04 9/15/202412,400 shares $178.68 thousand -30.7%N/A1 $14.41 8/31/202417,900 shares $259.19 thousand +103.4%N/A1.8 $14.48 8/15/20248,800 shares $133.76 thousand -35.8%N/A1.1 $15.20 7/31/202413,700 shares $201.25 thousand +20.2%N/A2 $14.69 7/15/202411,400 shares $168.75 thousand -17.4%N/A1.9 $14.80 6/30/202413,800 shares $229.77 thousand +43.8%N/A2.3 $16.65 6/15/20249,600 shares $163.88 thousand -41.1%N/A1.4 $17.07 5/31/202416,300 shares $292.42 thousand +29.4%N/A2.3 $17.94 5/15/202412,600 shares $219.11 thousand -16.0%N/A1.8 $17.39 4/30/202415,000 shares $299.40 thousand +11.9%N/A2 $19.96 4/15/202413,400 shares $268.67 thousand -30.6%N/A0.7 $20.05 3/31/202419,300 shares $339.29 thousand +144.3%N/A0.8 $17.58 3/15/20247,900 shares $143.62 thousand -2.5%N/A0.3 $18.18 2/29/20248,100 shares $143.09 thousand -35.2%N/A0.4 $17.67 2/15/202412,500 shares $220.13 thousand +0.8%N/A0.6 $17.61 1/31/202412,400 shares $223.06 thousand -10.1%N/A0.6 $17.99 1/15/202413,800 shares $238.19 thousand +14.1%N/A1.5 $17.26 12/31/202312,100 shares $218.65 thousand +40.7%N/A2.6 $18.07 12/15/20238,600 shares $169.08 thousand -4.4%N/A1.8 $19.66 11/30/20239,000 shares $209.52 thousand -8.2%N/A1.9 $23.28 11/15/20239,800 shares $239.12 thousand -36.8%N/A1.9 $24.40 10/31/202315,500 shares $398.51 thousand +23.0%N/A3.3 $25.71 10/15/202312,600 shares $284.76 thousand -21.7%N/A3.6 $22.60Is Elon's empire crumbling? (Ad)The Tesla Shock Nobody Sees Coming While headlines scream "Tesla is doomed"... Jeff Brown has uncovered a revolutionary AI breakthrough buried inside Tesla's labs. One that is helping AI escape from our computer screens and manifest itself here in the real world all while creating a 25,000% growth market explosion starting as early as July 23rd. Click here to see the Tesla shock that could blindside everyone. 9/30/202316,100 shares $360.80 thousand +11.0%N/A5 $22.41 9/15/202314,500 shares $309.29 thousand -14.2%N/A4.7 $21.33 8/31/202316,900 shares $349.49 thousand +59.4%N/A4.9 $20.68 8/15/202310,600 shares $220.90 thousand No ChangeN/A2.9 $20.84 7/31/202310,600 shares $216.35 thousand +17.8%N/A2.8 $20.41 7/15/20239,000 shares $186.12 thousand -4.3%N/A2.3 $20.68 6/30/20239,400 shares $195.90 thousand -2.1%N/A2.1 $20.84 6/15/20239,600 shares $184.61 thousand -15.0%N/A1.5 $19.23 5/31/202311,300 shares $235.61 thousand -15.7%N/A1.3 $20.85 5/15/202313,400 shares $255.54 thousand -1.5%N/A1.2 $19.07 4/30/202313,600 shares $268.19 thousand -20.0%N/A1.1 $19.72 4/15/202317,000 shares $329.80 thousand -9.6%N/A1.2 $19.40 3/31/202318,800 shares $381.45 thousand -42.5%N/A1.2 $20.29 3/15/202332,700 shares $694.88 thousand +51.4%N/A1.6 $21.25 2/28/202321,600 shares $449.28 thousand +67.4%N/A1.1 $20.80 2/15/202312,900 shares $247.42 thousand -22.8%N/A0.6 $19.18 1/31/202316,700 shares $305.44 thousand +12.1%N/A0.9 $18.29 1/15/202314,900 shares $271.78 thousand -77.5%N/A0.8 $18.24 12/30/202266,300 shares $1.30 million +151.1%N/A3.7 $19.64 12/15/202226,400 shares $497.11 thousand -65.1%N/A1.4 $18.83 11/30/202275,600 shares $1.40 million +132.6%N/A4.6 $18.55 11/15/202232,500 shares $625.30 thousand -35.6%N/A2.1 $19.24 10/31/202250,500 shares $1.06 million -0.4%N/A3.2 $20.94 10/15/202250,700 shares $1.22 million No ChangeN/A2.2 $24.12 9/30/202246,500 shares $1.18 million -2.5%N/A1.6 $25.27 9/15/202247,700 shares $1.10 million +3.9%N/A1.7 $23.08 8/31/202245,900 shares $1.13 million +73.2%N/A1.5 $24.65 8/15/202226,500 shares $533.18 thousand +150.0%N/A0.8 $20.12 7/31/202210,600 shares $260.87 thousand -21.5%N/A0.3 $24.61 7/15/202213,500 shares $324.54 thousand -84.6%N/A0.4 $24.04 6/30/202287,800 shares $2.37 million +644.1%N/A3.4 $26.95 6/15/202211,800 shares $381.49 thousand -21.9%N/A0.5 $32.33 5/31/202215,100 shares $430.20 thousand -36.0%N/A0.7 $28.49 5/15/202223,600 shares $724.76 thousand +4.9%N/A1.1 $30.71 4/30/202222,500 shares $652.28 thousand +14.2%N/A1.1 $28.99 4/15/202219,700 shares $457.04 thousand +38.7%N/A0.9 $23.20 3/31/202214,200 shares $342.36 thousand -21.6%N/A0.6 $24.11 3/15/202218,100 shares $511.33 thousand -39.9%N/A0.7 $28.25 2/28/202230,100 shares $812.70 thousand +2.4%N/A1.1 $27.00 2/15/202229,400 shares $743.53 thousand -8.7%N/A1.1 $25.29 1/31/202232,200 shares $811.44 thousand +35.9%N/A1.6 $25.20 1/15/202223,700 shares $546.06 thousand +1.3%N/A1.3 $23.04 12/31/202123,400 shares $469.64 thousand -2.1%N/A1.9 $20.07 12/15/202123,900 shares $480.15 thousand -7.4%N/A2 $20.09 11/30/202125,800 shares $515.74 thousand +80.4%N/A2.1 $19.99 11/15/202114,300 shares $282.21 thousand No ChangeN/A1.6 $19.73 10/29/202114,300 shares $266.55 thousand +14.4%N/A1.5 $18.64 10/15/202112,500 shares $238.25 thousand -2.3%N/A1.2 $19.06 9/30/202112,800 shares $230.91 thousand -15.2%N/A1.1 $18.04 9/15/202115,100 shares $250.06 thousand -7.9%N/A1.1 $16.56Is Elon's empire crumbling? (Ad)The Tesla Shock Nobody Sees Coming While headlines scream "Tesla is doomed"... Jeff Brown has uncovered a revolutionary AI breakthrough buried inside Tesla's labs. One that is helping AI escape from our computer screens and manifest itself here in the real world all while creating a 25,000% growth market explosion starting as early as July 23rd. Click here to see the Tesla shock that could blindside everyone. 8/31/202116,400 shares $271.09 thousand -23.0%N/A1.1 $16.53 8/13/202121,300 shares $366.79 thousand -20.8%N/A1.1 $17.22 7/30/202126,900 shares $491.73 thousand +12.1%N/A1.2 $18.28 7/15/202124,000 shares $470.88 thousand +61.1%N/A1 $19.62 6/30/202114,900 shares $274.01 thousand +19.2%N/A0.5 $18.39 6/15/202112,500 shares $243.50 thousand -57.2%N/A0.4 $19.48 5/28/202129,200 shares $632.18 thousand -10.7%N/A0.7 $21.65 5/14/202132,700 shares $766.75 thousand +157.5%N/A0.6 $23.45 4/30/202112,700 shares $266.95 thousand -5.9%N/A0.2 $21.02 4/15/202113,500 shares $299.03 thousand -43.5%N/A0.1 $22.15 3/31/202123,900 shares $568.34 thousand -4.8%N/A0.2 $23.78 3/15/202125,100 shares $542.41 thousand -18.0%N/A0.3 $21.61 2/26/202130,600 shares $651.78 thousand -22.7%N/A0.3 $21.30 2/12/202139,600 shares $729.04 thousand -60.3%N/A0.5 $18.41 1/29/202199,800 shares $2.07 million +552.3%N/A1.5 $20.76 1/15/202115,300 shares $313.80 thousand -27.5%N/A0.2 $20.51 12/31/202021,100 shares $490.58 thousand -27.5%N/A0.4 $23.25 12/15/202029,100 shares $666.97 thousand +54.0%N/A0.5 $22.92 11/30/202018,900 shares $503.31 thousand +3.3%N/A0.3 $26.63 11/15/202018,300 shares $503.98 thousand +34.6%N/A0.3 $27.54 10/30/202013,600 shares $428.26 thousand -11.1%N/A0.2 $31.49 10/15/202015,300 shares $424.27 thousand -18.6%N/A0 $27.73 9/30/202018,800 shares $582.31 thousand +15.3%N/A0.2 $30.97 9/15/202013,900 shares $429.81 thousand -14.7%N/A0.1 $30.92 8/31/202016,300 shares $517.04 thousand -81.2%N/A0.2 $31.72 8/14/202086,800 shares $2.87 million -26.9%N/A1 $33.12 7/31/2020118,700 shares $3.88 million +9.9%N/A0.4 $32.68 7/15/2020108,000 shares $3.29 million +94.6%N/A0.4 $30.44 6/30/202055,500 shares $1.85 million +4.1%N/A0.3 $33.28 6/15/202053,300 shares $1.98 million -12.1%N/A0.3 $37.08 BIS Short Interest - Frequently Asked Questions What is ProShares UltraShort Nasdaq Biotechnology's current short interest? Short interest is the volume of ProShares UltraShort Nasdaq Biotechnology shares that have been sold short but have not yet been covered or closed out. As of May 31st, investors have sold 7,200 shares of BIS short. 4.77% of ProShares UltraShort Nasdaq Biotechnology's shares are currently sold short. Learn More on ProShares UltraShort Nasdaq Biotechnology's current short interest. What is a good short interest ratio for ProShares UltraShort Nasdaq Biotechnology? 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. BIS shares currently have a short interest ratio of 1.0. Learn More on ProShares UltraShort Nasdaq Biotechnology's short interest ratio. What is a good short interest percentage for ProShares UltraShort Nasdaq Biotechnology? 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. 4.77% of ProShares UltraShort Nasdaq Biotechnology's floating shares are currently sold short. Is ProShares UltraShort Nasdaq Biotechnology's short interest increasing or decreasing? ProShares UltraShort Nasdaq Biotechnology saw a drop in short interest in the month of May. As of May 31st, there was short interest totaling 7,200 shares, a drop of 24.2% from the previous total of 9,500 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. How does ProShares UltraShort Nasdaq Biotechnology's short interest compare to its competitors? 4.77% of ProShares UltraShort Nasdaq Biotechnology's shares are currently sold short. Here is how the short interest of companies compare to ProShares UltraShort Nasdaq Biotechnology: JPMorgan Healthcare Leaders ETF (0.20%), First Trust Nasdaq Pharmaceuticals ETF (1.35%), Invesco Nasdaq Biotechnology ETF (0.29%), ProShares Ultra Nasdaq Biotechnology (1.83%), Invesco Dorsey Wright Healthcare Momentum ETF (0.23%), VanEck Biotech ETF (0.37%), VanEck Pharmaceutical ETF (41.19%), and iShares Biotechnology ETF (29.39%). Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($64.96 billion), Invesco QQQ ($27.88 billion), iShares Russell 2000 ETF ($19.94 billion), iShares 20+ Year Treasury Bond ETF ($9.69 billion), Strategy Incorporated ($8.58 billion), SPDR S&P Biotech ETF ($5.72 billion), Invesco S&P 500 Equal Weight ETF ($5.45 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.70 billion), Charter Communications, Inc. ($4.54 billion), and Industrial Select Sector SPDR Fund ($4.49 billion). View all of the most shorted stocks. What does it mean to sell short ProShares UltraShort Nasdaq Biotechnology stock? Short selling BIS is an investing strategy that aims to generate trading profit from ProShares UltraShort Nasdaq Biotechnology as its price is falling. BIS shares are trading down $0.36 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. How does a short squeeze work against ProShares UltraShort Nasdaq Biotechnology? A short squeeze for ProShares UltraShort Nasdaq Biotechnology occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of BIS, which in turn drives the price of the stock up even further. How often is ProShares UltraShort Nasdaq Biotechnology's short interest reported? Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including BIS, twice per month. The most recent reporting period available is May, 31 2025. More Short Interest Resources from MarketBeat Related Companies JPMorgan Healthcare Leaders ETF Short Interest Data First Trust Nasdaq Pharmaceuticals ETF Short Interest Data Invesco Nasdaq Biotechnology ETF Short Interest Data ProShares Ultra Nasdaq Biotechnology Short Interest Data Invesco Dorsey Wright Healthcare Momentum ETF Short Interest Data VanEck Biotech ETF Short Interest Data VanEck Pharmaceutical ETF Short Interest Data iShares Biotechnology ETF Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:BIS) was last updated on 6/12/2025 by MarketBeat.com Staff From Our PartnersTrump’s Exec Order #14154 could be a “Millionaire-Maker”Former Presidential Advisor, Jim Rickards, says Trump could “rewire our economy and hand millions of Americans...Paradigm Press | SponsoredGold is soaring. 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