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
,
21
of 21 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 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/01/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/15/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/22/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
FDA & RegulatoryRelease reads positive, stock fell 38.07%
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
26.6% of the drop was recovered five sessions later.
Month end -31.11% on 2021-10-29
This month ended before the fifth session after the move.
Close before and after
$27.00 to $16.79 as traded
Session open, high, low
$17.23, $17.92, $16.54
Opening gap
-36.18%
Close inside the session range
0.18 of the range, where 1.00 is the high
Session volume
664,488 shares, $11,153,431
Relative volume
40.1x 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
15
OCULAlso on the opposite board this monthon both boards
-36.20%
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/04/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/12/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Other AnnouncementRelease reads positive, stock fell 29.88%
against the close of 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/04/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/12/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 39.0% bigger, at -31.64%.
Month end -29.66% on 2021-10-29
Close before and after
$12.17 to $9.40 as traded
Session open, high, low
$12.16, $12.16, $9.33
Opening gap
-0.08%
Close inside the session range
0.02 of the range, where 1.00 is the high
Session volume
2,846,741 shares, $26,759,365
Relative volume
22.9x 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
32
SALMMore than one ranked move this month2+ ranked moves
-22.15%
against the close of 10/04/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 15.2% bigger, at -25.15%.
Month end -25.15% on 2021-10-29
Close before and after
$102.60 to $80.20 split-adjusted
Session open, high, low
$80.40, $82.00, $69.20
Opening gap
-21.64%
Close inside the session range
0.86 of the range, where 1.00 is the high
Session volume
802,612 shares, $64,369,482
Relative volume
5.3x 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
37
PROGAlso on the opposite board this monthon both boards
-21.79%
against the close of 10/01/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/20/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
34.3% of the drop was recovered five sessions later.
Month end -18.87% on 2021-10-29
This month ended before the fifth session after the move.
Close before and after
$73.72 to $58.64 split-adjusted
Session open, high, low
$66.09, $66.34, $57.54
Opening gap
-10.35%
Close inside the session range
0.13 of the range, where 1.00 is the high
Session volume
2,329,179 shares, $136,583,057
Relative volume
5.0x 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
43
PHATMore than one ranked move this month2+ ranked moves
-20.23%
against the close of 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/01/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 10.3% bigger, at -21.23%.
Month end -26.13% on 2021-10-29
Close before and after
$4.86 to $3.93 split-adjusted
Session open, high, low
$3.94, $4.01, $3.83
Opening gap
-19.06%
Close inside the session range
0.55 of the range, where 1.00 is the high
Session volume
50,199,954 shares, $197,165,339
Relative volume
1.4x 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
48
GNUSAlso on the opposite board this monthon both boards
-18.72%
against the close of 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/08/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/15/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/12/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 58.5% bigger, at -27.27%.
Month end -3.74% on 2021-10-29
Close before and after
$24.35 to $20.16 split-adjusted
Session open, high, low
$24.50, $24.53, $19.64
Opening gap
+0.62%
Close inside the session range
0.11 of the range, where 1.00 is the high
Session volume
641,329 shares, $12,929,193
Relative volume
3.1x 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
57
SALMMore than one ranked move this month2+ ranked moves
-17.12%
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
14.6% of the drop was recovered five sessions later.
Month end -16.74% on 2021-10-29same session
This month ended before the fifth session after the move.
Close before and after
$6.51 to $5.42 split-adjusted
Session open, high, low
$6.42, $6.42, $5.40
Opening gap
-1.38%
Close inside the session range
0.02 of the range, where 1.00 is the high
Session volume
194,048 shares, $1,051,740
Relative volume
10.5x 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
61
PLXPAlso on the opposite board this monthon both boards
-16.73%
against the close of 10/13/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 32.8% bigger, at -21.50%.
Month end -24.32% on 2021-10-29
Close before and after
$40.46 to $33.91 split-adjusted
Session open, high, low
$39.55, $41.04, $32.51
Opening gap
-2.25%
Close inside the session range
0.16 of the range, where 1.00 is the high
Session volume
4,189,715 shares, $142,073,236
Baseline gap
1 calendar day from the pre-news close to the measured session
66
PHATMore than one ranked move this month2+ ranked moves
-16.15%
against the close of 10/15/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 59.1% bigger, at -25.36%.
Month end -36.87% on 2021-10-29
Close before and after
$6.90 to $5.80 as traded
Session open, high, low
$5.35, $5.90, $5.20
Opening gap
-22.46%
Close inside the session range
0.86 of the range, where 1.00 is the high
Session volume
191,446 shares, $1,110,387
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
68
NTRBAlso on the opposite board this monthon both boards
-15.81%
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/15/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/22/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
4.7% of the drop was recovered five sessions later.
Month end -15.67% on 2021-10-29
This month ended before the fifth session after the move.
Close before and after
$21.95 to $18.55 as traded
Session open, high, low
$21.85, $21.85, $16.77
Opening gap
-0.46%
Close inside the session range
0.35 of the range, where 1.00 is the high
Session volume
609,630 shares, $11,308,637
Relative volume
14.3x 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
71
GRVIAlso on the opposite board this monthon both boards
-15.45%
against the close of 10/19/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/15/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/11/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/13/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/12/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/19/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/15/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/05/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/05/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/22/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/01/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/12/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/08/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/22/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2021session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 37.8% bigger, at -17.46%.
Month end -18.72% on 2021-10-29
This month ended before the fifth session after the move.
Close before and after
$184.17 to $160.84 split-adjusted
Session open, high, low
$185.99, $187.39, $159.01
Opening gap
+0.99%
Close inside the session range
0.06 of the range, where 1.00 is the high
Session volume
1,334,411 shares, $214,626,665
Relative volume
4.7x 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
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.567 smaller events this month are held out of this month's eligible pool; switch to include them.211 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
4 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 vendor names the ticker as a preferred, a note, a depositary share or a fund rather than a company's common stock.
2 events were left out of this board because the measured session set no price of its own, trading either nothing at all or barely moving on an ordinary day's volume, so the figure it would be ranked on is a price carried onto the tape rather than a close.
3 events were 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 October 2021, the median decliner had recovered 4.5% of its drop five sessions later; the largest catalyst group was Earnings, 31 of the 100 events, at a median of -16.7%.
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.
Median change since the measured close as a share of the drop
Day +1
99.0% of 100
0.9%recovered, of 100
Day +5
96.0% of 100
4.5%recovered, of 100
Month end
97.8% of 90
5.3%deeper below baseline, of 90
Month end falls before day +5 for 31 of these 90 events, so this row is not a later horizon than the one above it. 90 of the 100 events have a month-end close later than the measured session; 10 have it on the measured session itself.
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 October 2021
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-market47.0%
Intraday6.0%
After hours47.0%
Volume against normal
Under 5x19 events, 19.4%
5x to 20x53 events, 54.1%
Over 20x26 events, 26.5%
2 events have too little trading history for a relative volume, and are not in the tiers above.
Industry
Pharmaceutical Preparations21 events, 21.0%
Biological Products, (no Diagnostic Substances)9 events, 9.0%
Services-business Services, Nec3 events, 3.0%
Services-computer Programming, Data Processing, Etc.3 events, 3.0%
Surgical & Medical Instruments & Apparatus3 events, 3.0%
Services-computer Processing & Data Preparation2 events, 2.0%
25 other industries, 26 events
Industry not known: 33.0%
2 events on this board carry the flag for a move that ran against its own release, too few to say whether the flag predicts anything.
Against September 2021
100 events in the comparable window.
September 2021 median -14.5%, selected from the 8,608 events in that month's eligible pool
October 2021 median -18.4%, 3.9 points steeper than September 2021. October 2021's median is taken over the 100 ranked rows, selected from the 10,410 events in that month's eligible pool.
The two windows drew on pools of very different size, so part of the gap between the medians is how deep into each pool the top hundred reaches rather than how severe the moves were.
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.
