Cardio Diagnostics (CDIO) Short Interest Ratio & Short Volume $4.28 -0.05 (-1.15%) Closing price 10/17/2025 03:59 PM EasternExtended Trading$4.43 +0.15 (+3.60%) As of 10/17/2025 07:19 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Cardio Diagnostics Short Interest DataCardio Diagnostics (CDIO) has a short interest of 26,600 shares, representing 1.62% of the float (the number of shares available for trading by the public). This marks a -48.15% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.7, indicating that it would take 0.7 days of the average trading volume of 47,247 shares to cover all short positions.Current Short Interest26,600 sharesPrevious Short Interest51,300 sharesChange Vs. Previous Month-48.15%Dollar Volume Sold Short$106.67 thousandShort Interest Ratio0.7 Days to CoverLast Record DateSeptember 30, 2025Outstanding Shares1,763,000 sharesFloat Size1,640,000 sharesShort Percent of Float1.62%Today's Trading Volume23,750 sharesAverage Trading Volume47,247 sharesToday's Volume Vs. Average50% Short Selling Cardio Diagnostics? Sign up to receive the latest short interest report for Cardio Diagnostics and its competitors with MarketBeat's FREE newsletter. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCDIO Short Interest Over TimeCDIO Days to Cover Over TimeCDIO Percentage of Float Shorted Over Time Cardio Diagnostics Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/30/202526,600 shares $106.67 thousand -48.2%1.6%0.7 $4.01 9/15/202551,300 shares $192.38 thousand +196.5%3.1%1.5 $3.75 8/31/202517,300 shares $67.02 thousand -12.2%1.1%0.4 $3.87 8/15/202519,700 shares $71.51 thousand -3.9%1.1%0.4 $3.63 7/31/202520,500 shares $84.87 thousand +51.9%1.2%0.3 $4.14 7/15/202513,500 shares $60.21 thousand -70.3%0.8%0.2 $4.46 6/30/202545,400 shares $163.44 thousand -21.3%2.6%0.8 $3.60 6/15/202557,700 shares $234.26 thousand -32.8%3.3%1 $4.06 5/31/202585,900 shares $351.33 thousand +53.1%5.3%1.6 $4.09 5/15/202556,100 shares $224.40 thousand -95.7%3.5%1.1 $4.00 4/30/20251,310,000 shares $16.69 million -29.2%2.7%1 $12.74 4/15/20251,850,000 shares $737.78 thousand +19.4%3.8%1.3 $0.40 3/31/20251,550,000 shares $511.50 thousand +24.0%3.2%0.7 $0.33 3/15/20251,250,000 shares $530.38 thousand -36.9%2.6%0.5 $0.42 2/28/20251,980,000 shares $889.61 thousand -21.4%4.2%0.3 $0.45 2/15/20252,520,000 shares $1.69 million +43.2%6.9%0.4 $0.67 1/31/20251,760,000 shares $772.99 thousand +439.6%4.8%0.3 $0.44 1/15/2025326,200 shares $192.46 thousand -78.7%0.9%0 $0.59 12/31/20241,530,000 shares $1.40 million -56.0%4.2%0.2 $0.92 12/15/20243,480,000 shares $4.38 million +124.5%9.5%0.5 $1.26 11/30/20241,550,000 shares $471.20 thousand +261.3%4.5%0.3 $0.30 11/15/2024429,000 shares $109.40 thousand -74.5%2.0%0.1 $0.26 10/31/20241,680,000 shares $470.40 thousand +64.7%7.7%0.7 $0.28 10/15/20241,020,000 shares $218.48 thousand -63.6%4.7%0.8 $0.21 9/30/20242,800,000 shares $624.40 thousand +1,100.2%12.8%3 $0.22 9/15/2024233,300 shares $69.66 thousand -41.7%1.2%0.9 $0.30 8/31/2024400,200 shares $150.08 thousand +28.9%2.0%1.7 $0.38 8/15/2024310,500 shares $131.34 thousand +14.1%1.6%1.5 $0.42 7/31/2024272,100 shares $122.45 thousand -7.9%1.4%0.6 $0.45 7/15/2024295,400 shares $149.47 thousand -34.2%1.6%0.6 $0.51 6/30/2024448,900 shares $246.90 thousand +3.3%2.4%1 $0.55 6/15/2024434,400 shares $259.77 thousand -17.9%2.3%0.9 $0.60 5/31/2024529,300 shares $366.65 thousand -59.3%2.8%1 $0.69 5/15/20241,300,000 shares $1.10 million +286.3%7.0%2.2 $0.85 4/30/2024336,500 shares $230.50 thousand -34.1%1.9%0.9 $0.69 4/15/2024510,400 shares $509.12 thousand +14.8%2.9%1 $1.00 3/31/2024444,600 shares $631.33 thousand -2.6%2.5%0.6 $1.42 3/15/2024456,300 shares $574.94 thousand -7.7%2.7%0.4 $1.26 2/29/2024494,300 shares $800.77 thousand -32.6%3.0%0.3 $1.62 2/15/2024733,200 shares $1.31 million -3.2%4.4%0.3 $1.78 1/31/2024757,500 shares $1.65 million -10.6%4.5%0.1 $2.18 1/15/2024847,000 shares $2.22 million +78.6%5.1%0.1 $2.62 12/31/2023474,200 shares $1.18 million -38.3%2.8%0 $2.49 12/15/2023768,000 shares $1.80 million -28.2%4.6%0.1 $2.34 11/30/20231,070,000 shares $2.18 million -58.2%7.7%0.1 $2.04 11/15/20232,560,000 shares $2.71 million +774.9%18.4%0.2 $1.06 10/31/2023292,600 shares $88.25 thousand +11.3%5.3%0 $0.30 10/15/2023263,000 shares $68.93 thousand +282.3%4.8%0.5 $0.26 9/30/202368,800 shares $23.39 thousand +53.2%1.3%0.4 $0.34 9/15/202344,900 shares $22.00 thousand +532.4%0.8%0.3 $0.49 8/31/20237,100 shares $3.90 thousand -49.3%0.1%0 $0.55 8/15/202314,000 shares $13.16 thousand -79.8%0.3%0.1 $0.94 7/31/202369,200 shares $83.73 thousand -39.7%1.3%0.4 $1.21 7/15/2023114,700 shares $122.73 thousand -7.5%2.2%0.6 $1.07 6/30/2023124,000 shares $147.56 thousand -3.1%2.4%0.6 $1.19 6/15/2023127,900 shares $172.67 thousand -44.1%2.4%0.7 $1.35 5/31/2023228,600 shares $340.61 thousand +99.5%4.4%1 $1.49 5/15/2023114,600 shares $207.21 thousand No Change2.2%0 $1.81 CDIO Short Interest - Frequently Asked Questions What is Cardio Diagnostics' current short interest? Short interest is the volume of Cardio Diagnostics shares that have been sold short but have not yet been closed out or covered. As of September 30th, traders have sold 26,600 shares of CDIO short. 1.62% of Cardio Diagnostics' shares are currently sold short. Learn More on Cardio Diagnostics' current short interest. What is a good short interest ratio for Cardio Diagnostics? 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. CDIO shares currently have a short interest ratio of 1.0. Learn More on Cardio Diagnostics's short interest ratio. What is a good short interest percentage for Cardio Diagnostics? 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. 1.62% of Cardio Diagnostics' floating shares are currently sold short. Is Cardio Diagnostics' short interest increasing or decreasing? Cardio Diagnostics saw a drop in short interest in the month of September. As of September 30th, there was short interest totaling 26,600 shares, a drop of 48.1% from the previous total of 51,300 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. What is Cardio Diagnostics' float size? Cardio Diagnostics currently has issued a total of 1,760,000 shares. Some of Cardio Diagnostics' outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Cardio Diagnostics currently has a public float of 1,640,000 shares. How does Cardio Diagnostics' short interest compare to its competitors? 1.62% of Cardio Diagnostics' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Cardio Diagnostics: Iterum Therapeutics PLC (2.91%), PyroGenesis Canada Inc. (0.16%), Akari Therapeutics PLC (0.46%), Dare Bioscience, Inc. (1.87%), Cadrenal Therapeutics, Inc. (0.70%), Kezar Life Sciences, Inc. (12.16%), Enlivex Therapeutics Ltd. (1.09%), Rein Therapeutics Inc. (0.08%), Promis Neurosciences (1.76%), Exicure, Inc. (1.95%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Corporation ($15.71 billion), Robinhood Markets, Inc. ($7.56 billion), Reddit Inc. ($4.55 billion), Coinbase Global, Inc. ($4.53 billion), CoreWeave Inc. ($4.43 billion), Charter Communications, Inc. ($4.07 billion), Seagate Technology Holdings PLC ($3.94 billion), IonQ, Inc. ($3.78 billion), TC Energy Corporation ($3.13 billion), and Live Nation Entertainment, Inc. ($3.12 billion). View all of the most shorted stocks. What does it mean to sell short Cardio Diagnostics stock? Short selling CDIO is an investing strategy that aims to generate trading profit from Cardio Diagnostics as its price is falling. CDIO shares are trading down $0.05 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 Cardio Diagnostics? A short squeeze for Cardio Diagnostics 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 CDIO, which in turn drives the price of the stock up even further. How often is Cardio Diagnostics' 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 CDIO, twice per month. The most recent reporting period available is September, 30 2025. More Short Interest Resources from MarketBeat Related Companies Iterum Therapeutics Short Squeeze PyroGenesis Canada Short Squeeze Akari Therapeutics Short Squeeze Dare Bioscience Short Squeeze Cadrenal Therapeutics Short Squeeze Kezar Life Sciences Short Squeeze Enlivex Therapeutics Short Squeeze Rein Therapeutics Short Squeeze Promis Neurosciences Short Squeeze Exicure Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:CDIO) was last updated on 10/18/2025 by MarketBeat.com Staff From Our PartnersNvidia CEO Makes First Ever Tesla AnnouncementWhile headlines focus on Tesla’s car sales, tech analyst Jeff Brown says the real story is Tesla’s role in a $...Brownstone Research | SponsoredBuy alert: Move $1,000 before Tesla’s Optimus launchElon's $1,000,000,000,000 payday Elon Musk just made his biggest insider purchase of Tesla stock ever. 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