eFFECTOR Therapeutics (EFTR) Short Interest Ratio & Short Volume $0.0002 0.00 (-33.33%) As of 07/3/2025 09:43 AM Eastern Add Compare Share Share Short Interest Stock AnalysisChartCompetitorsInsider TradesSEC FilingsShort InterestTrendsBuy This Stock eFFECTOR Therapeutics Short Interest DataeFFECTOR Therapeutics (EFTR) has a short interest of 5,700 shares, representing 0.13% of the float (the number of shares available for trading by the public). This marks a 0.00% change in short interest from the previous month. The short interest ratio (days to cover) is 0.8, indicating that it would take 0.8 days of the average trading volume of 3,172 shares to cover all short positions.Current Short Interest5,700 sharesPrevious Short Interest5,700 sharesChange Vs. Previous MonthNo ChangeDollar Volume Sold Short$1.71Short Interest Ratio0.8 Days to CoverLast Record DateJune 15, 2025Outstanding Shares4,704,000 sharesShort Percent of Float0.13%Today's Trading Volume800 sharesAverage Trading Volume3,172 sharesToday's Volume Vs. Average25% Short Selling eFFECTOR Therapeutics? Sign up to receive the latest short interest report for eFFECTOR Therapeutics and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartEFTR Short Interest Over TimeEFTR Days to Cover Over TimeEFTR Percentage of Float Shorted Over Time eFFECTOR Therapeutics Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/15/20255,700 shares $1.71 No Change0.1%0.8 $0.00 5/31/20255,700 shares $0.00 No Change0.1%0.7 $0.00 5/15/20255,700 shares $3.42 No ChangeN/A2.6 $0.00 4/30/20255,700 shares $1.14 No ChangeN/A1.1 $0.00 4/15/20255,700 shares $1.14 No ChangeN/A9.5 $0.00 3/14/20255,700 shares $3.42 No ChangeN/A3.8 $0.00 2/28/20255,700 shares $1.14 No ChangeN/A9.5 $0.00 2/14/20255,700 shares $1.14 No ChangeN/A9.5 $0.00 1/31/20255,700 shares $1.14 No ChangeN/A1.1 $0.00 1/15/20255,700 shares $1.14 No ChangeN/A2.7 $0.00 Get the Latest News and Ratings for EFTR and Related StocksEnter your email address below to receive the latest news and analysts' ratings for eFFECTOR Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 6/30/2024687,000 shares $199.30 thousand +650.0%16.8%1.1 $0.29 6/15/202491,600 shares $114.50 thousand -3.3%2.3%0.1 $1.25 5/31/202494,700 shares $151.52 thousand -14.5%2.4%0.3 $1.60 5/15/2024110,700 shares $219.19 thousand -13.7%2.9%0.3 $1.98 4/30/2024128,300 shares $288.68 thousand -47.4%3.1%0.3 $2.25 4/15/2024244,000 shares $470.92 thousand -29.3%7.2%0.7 $1.93 3/31/2024345,200 shares $4.97 million +8.5%10.7%1 $14.39 3/15/2024318,100 shares $3.52 million +43.1%15.0%2.2 $11.06 2/29/2024222,300 shares $3.21 million +113.8%10.5%1.6 $14.44 2/15/2024104,000 shares $1.21 million -4.4%4.9%0.9 $11.66 1/31/2024108,800 shares $1.25 million -12.6%5.9%1 $11.47 1/15/2024124,500 shares $1.33 million -85.0%6.7%1.3 $10.69 12/31/2023827,900 shares $386.96 thousand -21.9%1.8%0.4 $0.47 12/15/20231,060,000 shares $398.35 thousand +1.0%2.3%0.6 $0.38 11/30/20231,050,000 shares $556.92 thousand +141.9%2.3%0.8 $0.53 11/15/2023434,000 shares $253.89 thousand +72.8%1.0%0.6 $0.59 10/31/2023251,100 shares $135.59 thousand -50.5%0.7%0.6 $0.54 10/15/2023507,600 shares $291.06 thousand +133.9%1.3%1.1 $0.57 9/30/2023217,000 shares $130.18 thousand -74.0%0.6%0.5 $0.60 9/15/2023834,100 shares $508.80 thousand -8.5%2.2%1.4 $0.61 8/31/2023912,000 shares $663.94 thousand +36.7%2.4%1 $0.73 8/15/2023667,400 shares $453.23 thousand -38.8%1.7%0.3 $0.68 7/31/20231,090,000 shares $881.16 thousand -15.5%3.6%0.5 $0.81 7/15/20231,290,000 shares $990.72 thousand +219.3%4.2%0.6 $0.77 6/30/2023404,000 shares $335.40 thousand +91.4%1.4%0.2 $0.83 6/15/2023211,100 shares $197.38 thousand -83.0%0.8%0.1 $0.94 5/31/20231,240,000 shares $1.15 million +1,506.2%4.6%0.8 $0.93 5/15/202377,200 shares $52.87 thousand -12.6%0.4%0.4 $0.68 4/30/202388,300 shares $41.50 thousand -32.5%0.6%0.5 $0.47 4/15/2023130,800 shares $50.36 thousand +236.3%0.7%0.7 $0.39INVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting Off (Ad)Right now, we’re witnessing a monumental shift in the world.Our No. 1 AI Pick is currently trading for pennies on the dollar compared to Nividia. 3/31/202338,900 shares $13.72 thousand -45.2%0.1%0.2 $0.35 3/15/202371,000 shares $28.40 thousand +110.7%0.2%0.2 $0.40 2/28/202333,700 shares $16.79 thousand -72.2%0.3%0.1 $0.50 2/15/2023121,300 shares $72.78 thousand -9.1%0.9%0.4 $0.60 1/31/2023133,400 shares $68.45 thousand -29.3%1.0%0.4 $0.51 1/15/2023188,800 shares $84.96 thousand +56.4%1.4%0.7 $0.45 12/30/2022120,700 shares $51.61 thousand +148.9%0.9%0.5 $0.43 12/15/202248,500 shares $19.40 thousand +41.4%0.4%0.5 $0.40 11/30/202234,300 shares $14.40 thousand -49.9%0.3%0.3 $0.42 11/15/202268,400 shares $37.70 thousand -51.7%0.5%0.5 $0.55 10/31/2022141,600 shares $86.76 thousand +13.2%1.1%0.1 $0.61 10/15/2022125,100 shares $73.30 thousand -42.5%1.0%0.1 $0.59 9/30/2022217,500 shares $124.43 thousand +55.0%1.7%0.2 $0.57 9/15/2022140,300 shares $83.07 thousand -25.5%1.1%0.1 $0.59 8/31/2022188,300 shares $114.77 thousand +21.5%1.4%0.2 $0.61 8/15/2022155,000 shares $111.03 thousand +104.8%1.3%0.1 $0.72 7/31/202275,700 shares $61.30 thousand -19.5%1.0%0.1 $0.81 7/15/202294,000 shares $105.28 thousand -30.4%1.2%1.5 $1.12 6/30/2022135,000 shares $191.70 thousand -12.0%1.8%3.1 $1.42 6/15/2022153,400 shares $225.50 thousand -13.2%2.0%4 $1.47 5/31/2022176,700 shares $381.67 thousand +0.8%2.3%5.2 $2.16 5/15/2022175,300 shares $315.54 thousand -26.2%2.3%6.7 $1.80 4/30/2022237,400 shares $790.54 thousand -1.7%3.2%8.1 $3.33 4/15/2022241,600 shares $850.43 thousand -3.4%3.2%7.9 $3.52 3/31/2022250,000 shares $1.00 million -6.6%N/A7.7 $4.01 3/15/2022267,700 shares $1.07 million -11.7%3.8%4.5 $4.00 2/28/2022303,100 shares $1.41 million -6.2%4.6%3.2 $4.65 2/15/2022323,200 shares $1.49 million -2.4%N/A3 $4.61 1/31/2022331,300 shares $1.87 million -5.3%5.1%2.7 $5.65 1/15/2022350,000 shares $2.54 million -5.9%N/A2.7 $7.25 12/31/2021372,100 shares $3.08 million No Change5.0%1.9 $8.28 EFTR Short Interest - Frequently Asked Questions What is eFFECTOR Therapeutics' current short interest? Short interest is the volume of eFFECTOR Therapeutics shares that have been sold short but have not yet been closed out or covered. As of June 15th, investors have sold 5,700 shares of EFTR short. 0.13% of eFFECTOR Therapeutics' shares are currently sold short. Learn More on eFFECTOR Therapeutics' current short interest. What is a good short interest ratio for eFFECTOR Therapeutics? 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. EFTR shares currently have a short interest ratio of 1.0. Learn More on eFFECTOR Therapeutics's short interest ratio. What is a good short interest percentage for eFFECTOR Therapeutics? 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. 0.13% of eFFECTOR Therapeutics' floating shares are currently sold short. How does eFFECTOR Therapeutics' short interest compare to its competitors? 0.13% of eFFECTOR Therapeutics' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to eFFECTOR Therapeutics: Clever Leaves Holdings Inc. (0.52%), OncoSec Medical Incorporated (0.00%), PaxMedica, Inc. (0.01%), Ampio Pharmaceuticals, Inc. (0.01%), Calithera Biosciences, Inc. (0.43%), Cocrystal Pharma, Inc. (0.07%), CytoMed Therapeutics Limited (1.20%), Eloxx Pharmaceuticals, Inc. (0.08%), Galapagos NV (2.99%), MEI Pharma, Inc. (0.02%), 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 ($69.26 billion), Invesco QQQ ($25.22 billion), iShares Russell 2000 ETF ($20.33 billion), iShares 20+ Year Treasury Bond ETF ($9.99 billion), MicroStrategy Incorporated ($9.12 billion), Canadian Natural Resources Limited ($6.73 billion), SPDR S&P Biotech ETF ($6.52 billion), Invesco S&P 500 Equal Weight ETF ($5.60 billion), Financial Select Sector SPDR Fund ($4.64 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.59 billion). View all of the most shorted stocks. What does it mean to sell short eFFECTOR Therapeutics stock? Short selling EFTR is an investing strategy that aims to generate trading profit from eFFECTOR Therapeutics as its price is falling. EFTR shares are trading down $0.00 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 eFFECTOR Therapeutics? A short squeeze for eFFECTOR Therapeutics 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 EFTR, which in turn drives the price of the stock up even further. How often is eFFECTOR Therapeutics' 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 EFTR, twice per month. The most recent reporting period available is June, 15 2025. More Short Interest Resources from MarketBeat Related Companies CLVR Short Interest Data ONCSQ Short Interest Data PXMD Short Interest Data ALVOW Short Interest Data AMPE Short Interest Data BCTXW Short Interest Data CALA Short Interest Data CLNNW Short Interest Data CLVRW Short Interest Data COCP 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:EFTR) was last updated on 7/6/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredTrump’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 | SponsoredThe day and month stocks are most likely to crash nextGood News for Stocks 50-year Wall Street veteran, Marc Chaikin is stepping forward to share why history giv...Chaikin Analytics | Sponsored140% Yields From Stocks Like Tesla? 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