Rallybio (RLYB) Short Interest Ratio & Short Volume $0.49 -0.01 (-1.41%) As of 10:25 AM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Rallybio Short Interest DataRallybio (RLYB) has a short interest of 1.98 million shares, representing 9.67% of the float (the number of shares available for trading by the public). This marks a 471.59% increase 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 1.24 million shares to cover all short positions.Current Short Interest1,980,000 sharesPrevious Short Interest346,400 sharesChange Vs. Previous Month+471.59%Dollar Volume Sold Short$819.72 thousandShort Interest Ratio0.7 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares41,790,000 sharesFloat Size20,470,000 sharesShort Percent of Float9.67%Today's Trading Volume34,337 sharesAverage Trading Volume1,238,342 sharesToday's Volume Vs. Average3% Short Selling Rallybio? Sign up to receive the latest short interest report for Rallybio and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartRLYB Short Interest Over TimeRLYB Days to Cover Over TimeRLYB Percentage of Float Shorted Over Time Rallybio Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/15/20251,980,000 shares $819.72 thousand +471.6%9.7%0.7 $0.41 6/30/2025346,400 shares $117.08 thousand +5.0%1.7%0.1 $0.34 6/15/2025330,000 shares $106.92 thousand +3.5%1.7%1.7 $0.32 5/31/2025318,900 shares $100.07 thousand -10.7%1.6%1.9 $0.31 5/15/2025356,900 shares $114.24 thousand -1.8%1.8%3.4 $0.32 4/30/2025363,400 shares $116.29 thousand +3.4%1.8%3.5 $0.32 4/15/2025351,600 shares $92.08 thousand +1.7%1.8%3.5 $0.26 3/31/2025345,900 shares $226.39 thousand +2.4%1.7%3.7 $0.65 3/15/2025337,800 shares $213.49 thousand +0.1%1.7%5 $0.63 2/28/2025337,500 shares $243.78 thousand +1.9%1.7%4.3 $0.72 Get the Latest News and Ratings for RLYB and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Rallybio and its competitors with MarketBeat's FREE daily newsletter. 2/15/2025331,100 shares $249.48 thousand -5.5%1.6%4 $0.75 1/31/2025350,200 shares $301.14 thousand -1.1%1.7%4.2 $0.86 1/15/2025353,900 shares $318.51 thousand 0.0%1.7%4.2 $0.90 12/31/2024354,000 shares $339.84 thousand +4.8%1.8%3.9 $0.96 12/15/2024337,700 shares $364.72 thousand -4.6%1.7%3.9 $1.08 11/30/2024354,100 shares $414.30 thousand -3.5%1.8%4.9 $1.17 11/15/2024367,000 shares $363.88 thousand -20.8%1.8%5.6 $0.99 10/31/2024463,400 shares $477.30 thousand -13.6%2.3%6.5 $1.03 10/15/2024536,600 shares $584.89 thousand -7.9%2.7%7.1 $1.09 9/30/2024582,300 shares $681.29 thousand +0.6%2.9%8.2 $1.17 9/15/2024579,100 shares $654.38 thousand +4.4%2.9%3.8 $1.13 8/31/2024554,700 shares $637.91 thousand -11.0%2.8%3.2 $1.15 8/15/2024623,300 shares $691.86 thousand +6.5%3.1%3.2 $1.11 7/31/2024585,500 shares $813.85 thousand -3.5%2.5%2.7 $1.39 7/15/2024606,900 shares $813.25 thousand -57.6%2.6%2.5 $1.34 6/30/20241,430,000 shares $1.92 million -16.9%6.2%0.9 $1.34 6/15/20241,720,000 shares $2.66 million -2.3%7.4%1.1 $1.55 5/31/20241,760,000 shares $2.94 million +1.2%7.6%1.1 $1.67 5/15/20241,740,000 shares $3.32 million -11.2%8.1%1.1 $1.91 4/30/20241,960,000 shares $3.76 million -33.8%9.7%1.2 $1.92 4/15/20242,960,000 shares $5.42 million +126.0%17.2%1.9 $1.83 3/31/20241,310,000 shares $2.42 million +2.3%7.6%6.2 $1.85 3/15/20241,280,000 shares $2.07 million +6.7%7.4%5.7 $1.62 2/29/20241,200,000 shares $2.79 million +11.1%7.0%5.2 $2.33 2/15/20241,080,000 shares $2.01 million +43.4%6.3%4.8 $1.86 1/31/2024753,400 shares $1.02 million +1.2%4.4%3.5 $1.35 1/15/2024744,600 shares $1.42 million +9.9%4.3%5.1 $1.91 12/31/2023677,600 shares $1.62 million -62.6%3.9%5.5 $2.39 12/15/20231,810,000 shares $5.50 million -14.6%10.7%16.8 $3.04 11/30/20232,120,000 shares $4.05 million -0.5%12.6%24.7 $1.91My shocking meeting in Washington, D.C. (Ad)After a shocking discovery in D.C., Jeff Brown is revealing: President Trump’s “Project MAFA” Get a look inside Trump’s genius master plan to create a “new” gold standard, smash the U.S. debt, and kick off a Golden Century.You can watch it right here. 11/15/20232,130,000 shares $4.97 million +0.5%12.6%34.2 $2.34 10/31/20232,120,000 shares $8.90 million +119.3%12.6%49 $4.20 10/15/2023966,800 shares $3.56 million -4.3%5.7%24.6 $3.68 9/30/20231,010,000 shares $3.40 million +1.0%6.0%24.3 $3.37 9/15/20231,000,000 shares $4.93 million No Change5.9%12.9 $4.93 8/31/20231,000,000 shares $5.32 million -4.8%5.9%11.5 $5.32 8/15/20231,050,000 shares $6.29 million -1.9%6.2%10.5 $5.99 7/31/20231,070,000 shares $6.40 million -5.3%6.4%11 $5.98 7/15/20231,130,000 shares $6.16 million +4.6%6.8%11.9 $5.45 6/30/20231,080,000 shares $6.11 million +41.8%6.8%11.4 $5.66 6/15/2023761,900 shares $5.62 million -18.6%4.8%8.3 $7.37 5/31/2023936,300 shares $6.70 million -0.1%5.8%15.7 $7.16 5/15/2023936,800 shares $5.10 million -0.1%5.8%16.8 $5.44 4/30/2023938,100 shares $5.06 million +1.5%5.8%16.5 $5.39 4/15/2023924,000 shares $3.98 million +1.0%5.7%14.4 $4.31 3/31/2023914,800 shares $5.22 million +3.3%5.9%14 $5.71 3/15/2023885,800 shares $4.43 million +11.4%5.7%13.5 $5.00 2/28/2023795,400 shares $6.26 million +0.5%5.2%9.3 $7.87 2/15/2023791,200 shares $5.44 million +8.3%5.3%9.1 $6.87 1/31/2023730,300 shares $5.07 million +2.5%4.8%6.3 $6.94 1/15/2023712,800 shares $4.40 million -7.1%4.5%6 $6.17 12/30/2022767,600 shares $5.04 million -0.3%4.9%6.6 $6.57 12/15/2022769,800 shares $5.40 million +1.0%4.4%6.5 $7.02 11/30/2022762,400 shares $4.39 million +0.6%5.3%7.6 $5.76 11/15/2022757,600 shares $4.42 million -1.1%5.2%8 $5.84 10/31/2022766,200 shares $7.32 million -0.4%6.1%13.5 $9.56 10/15/2022769,200 shares $6.69 million +1.3%6.1%14.3 $8.70 9/30/2022759,400 shares $10.99 million +19.0%6.1%15.3 $14.47 9/15/2022638,300 shares $8.62 million -5.1%5.1%11.3 $13.51 8/31/2022672,700 shares $7.43 million -1.4%5.4%12.4 $11.05 8/15/2022681,900 shares $8.83 million -1.1%5.4%8.2 $12.95 7/31/2022689,500 shares $6.43 million -4.4%5.3%8.1 $9.33 7/15/2022720,900 shares $6.61 million +2.3%5.5%8.3 $9.17 6/30/2022704,500 shares $5.32 million +1.0%5.4%7.4 $7.55 6/15/2022697,600 shares $4.88 million -3.2%5.4%6.6 $7.00 5/31/2022720,900 shares $9.80 million +3.5%5.6%5.3 $13.60 5/15/2022696,700 shares $7.64 million -0.4%5.5%5.5 $10.97 4/30/2022699,400 shares $6.97 million -0.9%5.3%5.4 $9.96 4/15/2022705,500 shares $6.37 million +11.8%5.3%5.4 $9.03 3/31/2022631,000 shares $4.40 million +41.3%4.8%5.1 $6.98 3/15/2022446,700 shares $3.86 million +1.8%3.4%3.8 $8.64 2/28/2022438,900 shares $4.82 million -1.7%3.3%5.9 $10.99 2/15/2022446,600 shares $5.76 million -17.8%3.4%7 $12.90 1/31/2022543,200 shares $6.61 million +2.6%3.9%9.5 $12.16 1/15/2022529,600 shares $4.70 million +10.7%3.9%11.1 $8.87 12/31/2021478,400 shares $4.56 million +12.0%3.5%9.4 $9.54 12/15/2021427,300 shares $4.37 million +8.5%3.1%8 $10.22 11/30/2021393,700 shares $5.07 million -3.6%2.8%5.4 $12.87 11/15/2021408,300 shares $5.68 million -10.4%2.9%4.9 $13.92 10/29/2021455,600 shares $8.13 million +24.6%3.3%4.9 $17.85My shocking meeting in Washington, D.C. (Ad)After a shocking discovery in D.C., Jeff Brown is revealing: President Trump’s “Project MAFA” Get a look inside Trump’s genius master plan to create a “new” gold standard, smash the U.S. debt, and kick off a Golden Century.You can watch it right here. 10/15/2021365,800 shares $5.68 million +34.7%2.6%2.5 $15.52 9/30/2021271,600 shares $4.77 million +90.5%2.0%1.6 $17.58 9/15/2021142,600 shares $1.82 million +145.9%1.0%0.8 $12.77 8/31/202158,000 shares $762.70 thousand -33.9%0.4%0.3 $13.15 8/13/202187,800 shares $1.50 million No Change0.7%0.4 $17.10 RLYB Short Interest - Frequently Asked Questions What is Rallybio's current short interest? Short interest is the volume of Rallybio shares that have been sold short but have not yet been closed out or covered. As of July 15th, traders have sold 1,980,000 shares of RLYB short. 9.67% of Rallybio's shares are currently sold short. Learn More on Rallybio's current short interest. What is a good short interest ratio for Rallybio? 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. RLYB shares currently have a short interest ratio of 1.0. Learn More on Rallybio's short interest ratio. What is a good short interest percentage for Rallybio? 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. 9.67% of Rallybio's floating shares are currently sold short. Is Rallybio's short interest increasing or decreasing? Rallybio saw a increase in short interest during the month of July. As of July 15th, there was short interest totaling 1,980,000 shares, an increase of 471.6% from the previous total of 346,400 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 Rallybio's float size? Rallybio currently has issued a total of 41,790,000 shares. Some of Rallybio's 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. Rallybio currently has a public float of 20,470,000 shares. How does Rallybio's short interest compare to its competitors? 9.67% of Rallybio's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Rallybio: Immunic, Inc. (8.68%), Entera Bio Ltd. (0.08%), Avalo Therapeutics, Inc. (1.91%), Oncolytics Biotech Inc. (2.49%), Surrozen, Inc. (1.62%), Quince Therapeutics, Inc. (2.13%), Adagene Inc. Sponsored ADR (0.17%), Invivyd, Inc. (5.87%), XBiotech Inc. (2.65%), Oramed Pharmaceuticals Inc. (0.99%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Coinbase Global, Inc. ($5.11 billion), Charter Communications, Inc. ($4.76 billion), Reddit Inc. ($2.84 billion), SoFi Technologies, Inc. ($2.79 billion), Seagate Technology Holdings PLC ($2.79 billion), Live Nation Entertainment, Inc. ($2.67 billion), Rocket Lab Corporation ($2.49 billion), AST SpaceMobile, Inc. ($2.12 billion), Moderna, Inc. ($2.09 billion), and Omnicom Group Inc. ($2.04 billion). View all of the most shorted stocks. What does it mean to sell short Rallybio stock? Short selling RLYB is an investing strategy that aims to generate trading profit from Rallybio as its price is falling. RLYB shares are trading down $0.03 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 Rallybio? A short squeeze for Rallybio 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 RLYB, which in turn drives the price of the stock up even further. How often is Rallybio'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 RLYB, twice per month. The most recent reporting period available is July, 15 2025. 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