Ranked by the close-to-close change of the trading session each announcement landed in. How this is measured.
Data as of the trading session of
,
19
of 19 completed market sessions produced ranked moves.
That date is the last ranked session, not the last priced one, so follow-through dates run later.
On 100 of these rows the measured session was reconstructed from the announcement time, because it predates our stored session records.
Every percentage on a row, the follow-through readings included, is measured against that row's own pre-news close, which the row names. A day +5 reading is therefore the move from before the announcement, not a further change on top of the headline percentage.
Rows are ordered by the move measured when the board was ranked. A percentage recomputed from the session's own closing prices can sit a little above or below its neighbours; the rank is the one the measured move gave the row.
against the close of 02/07/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/12/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/14/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/21/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/04/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/20/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/18/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/11/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/12/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/05/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/31/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/06/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/19/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 25.6% bigger, at -44.27%.
Month end -34.09% on 2025-02-28
This month ended before the fifth session after the move.
Close before and after
$33.59 to $21.75 split-adjusted
Session open, high, low
$24.18, $25.52, $21.43
Opening gap
-28.01%
Close inside the session range
0.08 of the range, where 1.00 is the high
Session volume
12,513,740 shares, $272,173,845
Relative volume
13.7x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
24
OMIAlso on the opposite board this monthon both boards
-35.18%
against the close of 01/31/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/11/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/05/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/21/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/04/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/31/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/12/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/05/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/20/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/18/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
23.6% of the drop was recovered five sessions later.
Month end -25.81% on 2025-02-28
Close before and after
$4.65 to $3.25 as traded
Session open, high, low
$3.30, $3.55, $3.18
Opening gap
-29.14%
Close inside the session range
0.19 of the range, where 1.00 is the high
Session volume
14,188,473 shares, $46,112,537
Relative volume
53.4x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
42
IVVDMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-29.94%
against the close of 02/21/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/11/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/18/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/20/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/06/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/19/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/31/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/06/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/07/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/21/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/13/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/07/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 63.2% bigger, at -42.09%.
Month end -53.52% on 2025-02-28
Close before and after
$1.59 to $1.18 split-adjusted
Session open, high, low
$1.35, $1.38, $1.11
Opening gap
-15.09%
Close inside the session range
0.26 of the range, where 1.00 is the high
Session volume
33,624,894 shares, $39,677,375
Relative volume
4.7x the median of the 20 sessions before the pre-news close
Baseline gap
3 calendar days from the pre-news close to the measured session
61
HIMSMore than one ranked move this monthrelease reads positive2+ ranked moves
-25.79%
against the close of 02/20/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/19/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 20.3% bigger, at -30.63%.
Month end -24.72% on 2025-02-28
This month ended before the fifth session after the move.
Close before and after
$2.71 to $2.02 split-adjusted
Session open, high, low
$2.59, $2.67, $1.81
Opening gap
-4.43%
Close inside the session range
0.24 of the range, where 1.00 is the high
Session volume
15,849,603 shares, $32,016,198
Relative volume
6.1x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
65
TNXPMore than one ranked move this month2+ ranked moves
-24.97%
against the close of 02/05/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/11/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/05/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/06/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/11/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/12/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/14/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 41.5% bigger, at -32.99%.
Month end -37.43% on 2025-02-28
Close before and after
$8.79 to $6.74 split-adjusted
Session open, high, low
$8.32, $8.38, $6.60
Opening gap
-5.35%
Close inside the session range
0.08 of the range, where 1.00 is the high
Session volume
4,670,017 shares, $31,475,915
Relative volume
8.1x the median of the 20 sessions before the pre-news close
Baseline gap
4 calendar days from the pre-news close to the measured session
75
IVVDMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-23.04%
against the close of 02/07/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/14/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/13/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 47.0% bigger, at -32.92%.
Month end -28.32% on 2025-02-28
Close before and after
$11.97 to $9.29 split-adjusted
Session open, high, low
$12.00, $12.10, $9.19
Opening gap
+0.25%
Close inside the session range
0.03 of the range, where 1.00 is the high
Session volume
3,521,199 shares, $32,711,939
Relative volume
6.1x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
80
HIMSMore than one ranked move this month2+ ranked moves
-22.32%
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
5.5% of the drop was recovered five sessions later.
Month end -12.12% on 2025-02-28
This month ended before the fifth session after the move.
Close before and after
$51.31 to $39.86 split-adjusted
Session open, high, low
$39.88, $43.22, $36.02
Opening gap
-22.28%
Close inside the session range
0.53 of the range, where 1.00 is the high
Session volume
82,827,022 shares, $3,301,485,097
Relative volume
4.9x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
81
SRMAlso on the opposite board this monthon both boards
-22.04%
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 76.3% bigger, at -38.86%.
Month end -34.58% on 2025-02-28
This month ended before the fifth session after the move.
Close before and after
$0.6215 to $0.4845 as traded
Session open, high, low
$0.6000, $0.6199, $0.4666
Opening gap
-3.46%
Close inside the session range
0.12 of the range, where 1.00 is the high
Session volume
3,312,662 shares, $1,604,985
Relative volume
17.5x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
82
TNXPMore than one ranked move this month2+ ranked moves
-21.96%
against the close of 02/03/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 54.5% bigger, at -33.84%.
Month end -31.98% on 2025-02-28
This month ended before the fifth session after the move.
Close before and after
$9.13 to $7.13 split-adjusted
Session open, high, low
$6.46, $7.29, $6.35
Opening gap
-29.24%
Close inside the session range
0.83 of the range, where 1.00 is the high
Session volume
13,508,277 shares, $96,314,015
Relative volume
8.3x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
84
RNAZAlso on the opposite board this monthon both boards
-21.91%
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/20/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Earningscatalyst from a later release the same session
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/24/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
M&A / Acquisitioncatalyst from a later release the same session
against the close of 02/13/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/18/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/25/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/26/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/11/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/27/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/10/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 02/05/2025session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 14.4% bigger, at -23.95%.
Month end -30.42% on 2025-02-28
Close before and after
$222.99 to $176.32 split-adjusted
Session open, high, low
$222.80, $222.80, $175.08
Opening gap
-0.09%
Close inside the session range
0.03 of the range, where 1.00 is the high
Session volume
778,116 shares, $137,197,413
Relative volume
4.3x the median of the 20 sessions before the pre-news close
Baseline gap
1 calendar day from the pre-news close to the measured session
NYSE and Nasdaq companies with a market capitalization of $25M or more, measured today. The exchange is the one recorded on each announcement, and a release naming several tickers records one venue for all of them. A session that changed hands for less than $25,000 in total is not ranked, because a percentage set by a handful of shares is a print rather than a move. On a board older than a year a fund is identified by its name alone, because an instrument class describes whoever holds the ticker today.689 smaller events this month are held out of this month's eligible pool; switch to include them.224 events never entered this month's eligible pool, because the ticker is a warrant, a unit, a right or a preferred rather than common stock, or carries a stored capitalization above $10 trillion, which is larger than any company has reached.Include the $5M to $25M band
9 candidate events for this board could not be anchored to a trading session and are not listed.
1 event was left out of this board because the stored move and the session's own closing prices disagree by far more than a measurement difference, so neither figure could be published.
1 event was left out of this board because the price series changes basis between the baseline close and the measured one, so the two prices do not describe the same shares of the same company and their ratio measures a corporate action, or a change in what the ticker identifies, rather than a move.
1 event was left out of this board because the ticker had not traded for more than 10 days before the measured session, so no comparable prior close exists.
Company names are not shown on months older than a year, because only the current holder of each ticker is known.
Whole board, unfiltered
In February 2025, the median decliner was 9.1% deeper below its pre-news close five sessions later; the largest catalyst group was Earnings, 65 of the 100 events, at a median of -27.3%.
Close-to-close change on the measured trading session, against the previous close.
NYSE and Nasdaq companies with a market capitalization of $25M or more, measured today. The exchange is the one recorded on each announcement, and a release naming several tickers records one venue for all of them. A session that changed hands for less than $25,000 in total is not ranked, because a percentage set by a handful of shares is a print rather than a move. On a board older than a year a fund is identified by its name alone, because an instrument class describes whoever holds the ticker today.
Fewer than 10 events in this group, so no figures are shown.
Clinical Trial Results
5
5.0%
Fewer than 10 events in this group, so no figures are shown.
M&A / Acquisition
4
4.0%
Fewer than 10 events in this group, so no figures are shown.
The day +5 figures are measured over the events in each group that have a five-session close, the count printed beside them, not over every event in the group.
4 other catalyst types, 6 events: Contract / Partnership, FDA & Regulatory, Guidance Change, Uplisting / Compliance.
Median change since the measured close as a share of the drop
Day +1
100.0% of 99
4.9%deeper below baseline, of 99
Day +5
100.0% of 97
9.1%deeper below baseline, of 97
Month end
98.8% of 85
10.9%deeper below baseline, of 85
Month end falls before day +5 for 31 of these 85 events, so this row is not a later horizon than the one above it. 85 of the 100 events have a month-end close later than the measured session; 12 have it on the measured session itself, and 3 have no month-end close.
Both figures in a row are measured over the events that have a close at that horizon, the count printed beside each of them, not over all 100 events on this board, which is why the denominators differ between rows.
Repeat runners
Some companies move on news more than once. The left list holds the ones that moved twice or more this month; the right list holds the ones that also moved in the months before it. The ranking above shows one row per move, so a name that keeps coming back is only visible here.
Moved twice or more inside February 2025
Two or more ranked moves this month, each on a different trading day.
Price bands are not shown on months older than a year, because the stored prices are adjusted for splits done since and a company that has reverse-split lands in a band its shares never traded in.
When the announcement landed
Pre-market45.0%
Intraday1.0%
After hours54.0%
Volume against normal
Under 5x16 events, 16.5%
5x to 20x65 events, 67.0%
Over 20x16 events, 16.5%
3 events have too little trading history for a relative volume, and are not in the tiers above.
Industry
Pharmaceutical Preparations10 events, 10.0%
Semiconductors & Related Devices6 events, 6.0%
Services-computer Programming, Data Processing, Etc.6 events, 6.0%
Surgical & Medical Instruments & Apparatus6 events, 6.0%
Biological Products, (no Diagnostic Substances)4 events, 4.0%
Services-prepackaged Software4 events, 4.0%
44 other industries, 49 events
Industry not known: 15.0%
1 event on this board carries the flag for a move that ran against its own release, too few to say whether the flag predicts anything.
Against January 2025
100 events in the comparable window.
January 2025 median -22.1%, selected from the 8,012 events in that month's eligible pool
February 2025 median -27.8%, 5.7 points steeper than January 2025. February 2025's median is taken over the 100 ranked rows, selected from the 8,990 events in that month's eligible pool.
How this ranking is measured
Close-to-close change on the measured trading session, against the previous close.
An announcement before 16:00 ET is measured on that trading day; one at or after 16:00 ET, or on a weekend, is measured on the next trading day.
One row per company and measured session. Other announcements the company made in the same session are listed inside the row.
A ranking is a coincidence of news and price on the same session, not proof that the news caused the move. Part of an intraday move can precede the announcement.
No Stated Cause marks a release in which the company itself says it knows of no reason for the move, while Other Announcement marks a release these rules could not classify.
Eligibility uses each company's capitalization today, not its capitalization at the time. Archive boards can therefore change as companies grow or shrink.
Prices are adjusted for stock splits the company has done since, so an older row's dollar figures are stated on today's share count and are not the prices that traded that day. The percentage move, the dollar volume and the relative volume are unaffected, because both prices carry the same adjustment. The session's share count carries the adjustment too, so the shares figure beside the dollar volume is that count restated on today's basis rather than the number of shares that changed hands. Where the ticker was retired the price series stops with it and no later adjustment reached it, so those rows are marked as traded and their dollars are the ones that changed hands on the day.
Market cap is not shown on months older than a year, because only today's figure exists.
NYSE and Nasdaq companies with a market capitalization of $25M or more, measured today. The exchange is the one recorded on each announcement, and a release naming several tickers records one venue for all of them. A session that changed hands for less than $25,000 in total is not ranked, because a percentage set by a handful of shares is a print rather than a move. On a board older than a year a fund is identified by its name alone, because an instrument class describes whoever holds the ticker today.
On 100 of these rows the measured session was reconstructed from the announcement time, because it predates our stored session records.
This archive starts at 2020-04, the first month with ranked moves.
