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Biogen (BIIB) Short Interest Ratio & Short Volume

$216.78
+2.37 (+1.11%)
(As of 12:09 PM ET)

Biogen Short Interest Data

Current Short Interest
3,480,000 shares
Previous Short Interest
3,150,000 shares
Change Vs. Previous Month
+10.48%
Dollar Volume Sold Short
$818.91 million
Short Interest Ratio
2.9 Days to Cover
Last Record Date
May 15, 2024
Outstanding Shares
145,600,000 shares
Float Size
144,500,000 shares
Short Percent of Float
2.41%
Today's Trading Volume
255,611 shares
Average Trading Volume
1,162,415 shares
Today's Volume Vs. Average
22%
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BIIB Short Interest Over Time

BIIB Days to Cover Over Time

BIIB Percentage of Float Shorted Over Time

Biogen Short Interest History

Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
5/15/20243,480,000 shares $818.91 million +10.5%2.4%2.9 $235.32
4/30/20243,150,000 shares $676.68 million -3.4%2.2%2.4 $214.82
4/15/20243,260,000 shares $641.57 million -8.2%2.3%2.7 $196.80
3/31/20243,550,000 shares $765.49 million +33.5%2.5%3 $215.63
3/15/20242,660,000 shares $583.36 million -5.0%1.8%2.4 $219.31
2/29/20242,800,000 shares $607.57 million -9.7%1.9%2.4 $216.99
2/15/20243,100,000 shares $692.39 million +1.3%2.2%2.8 $223.35
1/31/20243,060,000 shares $754.78 million -18.6%2.1%2.9 $246.66
1/15/20243,760,000 shares $932.93 million -3.8%2.6%3.4 $248.12
12/31/20233,910,000 shares $1.01 billion +32.5%2.7%3.6 $258.77
12/15/20232,950,000 shares $731.98 million +4.2%2.1%2.7 $248.13
11/30/20232,830,000 shares $662.45 million +7.6%2.0%2.9 $234.08
11/15/20232,630,000 shares $603.93 million -2.2%1.8%2.8 $229.63
10/31/20232,690,000 shares $638.98 million +1.9%1.9%3 $237.54
10/15/20232,640,000 shares $692.37 million -7.7%1.8%2.8 $262.26
9/30/20232,860,000 shares $735.05 million -10.9%2.0%3 $257.01
9/15/20233,210,000 shares $817.88 million +2.2%2.2%3.2 $254.79
8/31/20233,140,000 shares $839.51 million +3.6%2.2%2.9 $267.36
8/15/20233,030,000 shares $818.77 million -11.4%2.1%2.7 $270.22
7/31/20233,420,000 shares $924.05 million +33.1%2.4%3.1 $270.19
7/15/20232,570,000 shares $716.85 million +24.2%1.8%2.2 $278.93
6/30/20232,070,000 shares $589.64 million -7.2%1.4%2 $284.85
6/15/20232,230,000 shares $664.16 million -11.9%1.6%2.3 $297.83
5/31/20232,530,000 shares $749.92 million -14.5%1.8%2.7 $296.41
5/15/20232,960,000 shares $923.14 million +30.4%2.1%3.3 $311.87
4/30/20232,270,000 shares $690.60 million +13.5%1.6%2.4 $304.23
4/15/20232,000,000 shares $576.26 million -2.4%1.4%2.4 $288.13
3/31/20232,050,000 shares $569.96 million +3.5%1.4%2.2 $278.03
3/15/20231,980,000 shares $519.49 million +7.0%1.4%2 $262.37
2/28/20231,850,000 shares $499.24 million +8.2%1.3%1.8 $269.86
2/15/20231,710,000 shares $477.06 million -8.6%1.2%1.5 $278.98
1/31/20231,870,000 shares $543.98 million -1.1%1.3%1.6 $290.90
1/15/20231,890,000 shares $544.40 million +10.5%1.3%1.5 $288.04
12/30/20221,710,000 shares $473.53 million -18.6%1.2%1.2 $276.92
12/15/20222,100,000 shares $595.22 million -15.7%1.5%1.2 $283.44
11/30/20222,490,000 shares $759.87 million +2.5%1.7%1.4 $305.17
11/15/20222,430,000 shares $728.47 million -1.6%N/A1.5 $299.78
10/31/20222,470,000 shares $700.10 million -1.2%1.7%1.6 $283.44
10/15/20222,500,000 shares $661.58 million -7.8%1.7%1.7 $264.63
9/30/20222,710,000 shares $723.57 million +30.9%1.9%2.1 $267.00
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9/15/20222,070,000 shares $427.91 million +9.5%1.4%2.2 $206.72
8/31/20221,890,000 shares $369.27 million -5.5%1.3%2 $195.38
8/15/20222,000,000 shares $444.76 million +3.1%1.4%2.1 $222.38
7/31/20221,940,000 shares $417.22 million -7.2%1.3%1.8 $215.06
7/15/20222,090,000 shares $453.55 million -17.1%1.4%1.9 $217.01
6/30/20222,520,000 shares $513.93 million -5.3%1.7%2.3 $203.94
6/15/20222,660,000 shares $524.71 million +10.4%1.8%2.4 $197.26
5/31/20222,410,000 shares $482 million +9.6%1.7%2.2 $200.00
5/15/20222,200,000 shares $438.04 million +7.8%1.5%2 $199.11
4/30/20222,040,000 shares $423.18 million +5.7%1.4%1.9 $207.44
4/15/20221,930,000 shares $410.22 million No Change1.3%1.7 $212.55
3/31/20221,930,000 shares $406.46 million -12.3%1.3%1.4 $210.60
3/15/20222,200,000 shares $434.19 million -11.3%1.5%1.4 $197.36
2/28/20222,480,000 shares $523.30 million -2.4%1.7%1.6 $211.01
2/15/20222,540,000 shares $552.12 million -13.9%1.7%1.6 $217.37
1/31/20222,950,000 shares $666.70 million +2.1%2.0%1.8 $226.00
1/15/20222,890,000 shares $691.58 million +17.5%2.0%1.9 $239.30
12/31/20212,460,000 shares $590.20 million +5.6%1.7%1.8 $239.92
12/15/20212,330,000 shares $549.60 million -2.5%1.6%2 $235.88
11/30/20212,390,000 shares $563.42 million +16.6%1.6%2.1 $235.74
11/15/20212,050,000 shares $557.23 million -13.9%1.4%2 $271.82
10/29/20212,380,000 shares $634.70 million -0.8%1.6%2.3 $266.68
10/15/20212,400,000 shares $674.86 million -3.6%1.6%2.4 $281.19
9/30/20212,490,000 shares $704.65 million +2.1%1.7%2.4 $282.99
9/15/20212,440,000 shares $730.07 million +2.5%1.6%2.1 $299.21
8/31/20212,380,000 shares $806.61 million +9.2%1.6%1.7 $338.91
8/13/20212,180,000 shares $746.11 million +21.8%1.5%1.1 $342.25
7/30/20211,790,000 shares $584.85 million -4.3%1.2%0.9 $326.73
7/15/20211,870,000 shares $613.66 million -2.6%1.2%1 $328.16
6/30/20211,920,000 shares $664.84 million -44.8%1.3%1 $346.27
6/15/20213,480,000 shares $1.38 billion +11.2%2.3%2 $396.08
5/28/20213,130,000 shares $837.21 million +3.0%2.1%1.9 $267.48
5/14/20213,040,000 shares $856.40 million -5.6%2.0%2.8 $281.71
4/30/20213,220,000 shares $854.36 million -0.6%2.1%2.9 $265.33
4/15/20213,240,000 shares $861.16 million -11.2%2.2%2.7 $265.79
3/31/20213,650,000 shares $1.01 billion -8.1%2.4%2.9 $276.01
3/15/20213,970,000 shares $1.06 billion +11.2%2.6%3 $266.13
2/26/20213,570,000 shares $989.82 million +4.4%2.4%2.8 $277.26
2/12/20213,420,000 shares $953.53 million -6.8%2.3%2.6 $278.81
1/29/20213,670,000 shares $983.08 million +0.8%2.4%2.4 $267.87
1/15/20213,640,000 shares $1.02 billion -2.4%2.4%2.1 $280.29
12/31/20203,730,000 shares $908.55 million -3.1%2.4%2.2 $243.58
12/15/20203,850,000 shares $944.21 million -7.0%2.5%2.3 $245.25
11/30/20204,140,000 shares $1.01 billion +11.6%2.7%2.5 $243.78
11/15/20203,710,000 shares $922.27 million -2.4%2.4%2.3 $248.59
10/30/20203,800,000 shares $932.82 million +26.3%2.5%2.5 $245.48
10/15/20203,010,000 shares $869.95 million +6.4%2.0%2.6 $289.02
9/30/20202,830,000 shares $802.81 million -23.3%1.8%2.5 $283.68
9/15/20203,690,000 shares $1.03 billion +11.5%2.3%3 $278.45
8/31/20203,310,000 shares $952.09 million +39.1%2.1%2.2 $287.64
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8/14/20202,380,000 shares $688.89 million -6.7%1.5%1.6 $289.45
7/31/20202,550,000 shares $700.46 million -8.3%1.6%1.6 $274.69
7/15/20202,780,000 shares $781.93 million -14.7%1.8%1.7 $281.27
6/30/20203,260,000 shares $872.21 million -29.9%2.0%1.8 $267.55
6/15/20204,650,000 shares $1.29 billion +2.7%2.9%2.4 $278.49
5/29/20204,530,000 shares $1.39 billion +1.1%2.8%2.3 $307.09
5/15/20204,480,000 shares $1.42 billion +7.4%2.8%2.2 $316.60
4/30/20204,170,000 shares $1.24 billion +9.5%2.6%2 $296.83
4/15/20203,810,000 shares $1.25 billion +26.6%2.3%1.7 $326.94
3/31/20203,010,000 shares $896.38 million -15.5%1.7%1.4 $297.80
3/13/20203,560,900 shares $1.14 billion +13.4%2.1%1.9 $321.05
2/28/20203,140,000 shares $845.26 million -6.8%1.8%1.8 $269.19
2/14/20203,370,000 shares $1.03 billion +8.4%1.9%1.9 $305.63
1/31/20203,110,000 shares $1.02 billion -13.6%1.8%1.7 $327.45
1/15/20203,600,000 shares $1.20 billion -16.9%2.0%2 $332.29
12/31/20194,330,000 shares $1.20 billion +3.3%2.4%2 $278.14
8/15/20194,118,800 shares $921.62 million +8.7%2.1%2.6 $223.76

BIIB Short Interest - Frequently Asked Questions

What is Biogen's current short interest?

Short interest is the volume of Biogen shares that have been sold short but have not yet been covered or closed out. As of May 15th, traders have sold 3,480,000 shares of BIIB short. 2.41% of Biogen's shares are currently sold short. Learn More on Biogen's current short interest.

What is a good short interest ratio for Biogen?

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. BIIB shares currently have a short interest ratio of 3.0. Learn More on Biogen's short interest ratio.

Which institutional investors are shorting Biogen?

As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Biogen: Walleye Trading LLC, Jane Street Group LLC, PEAK6 Investments LLC, Twin Tree Management LP, XR Securities LLC, Capstone Investment Advisors LLC, BNP Paribas Financial Markets, Concourse Financial Group Securities Inc., and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission.

What is a good short interest percentage for Biogen?

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. 2.41% of Biogen's floating shares are currently sold short.

Is Biogen's short interest increasing or decreasing?

Biogen saw a increase in short interest during the month of May. As of May 15th, there was short interest totaling 3,480,000 shares, an increase of 10.5% from the previous total of 3,150,000 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 Biogen's float size?

Biogen currently has issued a total of 145,600,000 shares. Some of Biogen'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. Biogen currently has a public float of 144,500,000 shares.

How does Biogen's short interest compare to its competitors?

2.41% of Biogen's shares are currently sold short. Here is how the short interest of companies compare to Biogen: Teva Pharmaceutical Industries Limited (1.16%), American Electric Power Company, Inc. (2.20%), Pinnacle West Capital Co. (3.08%), CRISPR Therapeutics AG (18.05%), Portland General Electric (3.77%), Denali Therapeutics Inc. (8.09%), Vertex Pharmaceuticals Incorporated (1.46%), Regeneron Pharmaceuticals, Inc. (1.48%), Gilead Sciences, Inc. (1.75%), Alnylam Pharmaceuticals, Inc. (2.01%),

Which stocks are the most shorted right now?

As of the most recent reporting period, the following stocks had the largest short interest positions: T-Mobile US, Inc. ($3.81 billion), Charter Communications, Inc. ($3.30 billion), Occidental Petroleum Co. ($3.10 billion), General Motors ($2.84 billion), Moderna, Inc. ($2.77 billion), AppLovin Co. ($2.22 billion), Royal Caribbean Cruises Ltd. ($2.22 billion), Coinbase Global, Inc. ($2.16 billion), Tractor Supply ($2.12 billion), and Williams-Sonoma, Inc. ($2.12 billion). View all of the most shorted stocks.

What does it mean to sell short Biogen stock?

Short selling BIIB is an investing strategy that aims to generate trading profit from Biogen as its price is falling. BIIB shares are trading down $4.32 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 Biogen?

A short squeeze for Biogen 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 BIIB, which in turn drives the price of the stock up even further.

How often is Biogen'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 BIIB, twice per month. The most recent reporting period available is May, 15 2024.



More Short Interest Resources from MarketBeat

This page (NASDAQ:BIIB) was last updated on 5/30/2024 by MarketBeat.com Staff

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