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
,
20
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 10/12/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
4.8% of the drop was recovered five sessions later.
Month end -79.84% on 2022-10-31
Close before and after
$31.69 to $6.48 split-adjusted
Session open, high, low
$6.66, $7.45, $6.10
Opening gap
-78.98%
Close inside the session range
0.28 of the range, where 1.00 is the high
Session volume
19,660,989 shares, $127,304,904
Relative volume
37.2x 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
2
IMUXAlso on the opposite board this monthon both boards
-77.39%
against the close of 10/20/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/12/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 36.7% bigger, at -59.71%.
Month end -65.31% on 2022-10-31
Close before and after
$911.00 to $513.00 as traded
Session open, high, low
$800.00, $800.00, $501.50
Opening gap
-12.18%
Close inside the session range
0.04 of the range, where 1.00 is the high
Session volume
28,596 shares, $14,669,748
Relative volume
56.6x 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
13
ARBKMore than one ranked move this month2+ ranked moves
-43.65%
against the close of 10/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
18.1% of the drop was recovered five sessions later.
Month end -37.60% on 2022-10-31
Close before and after
$24.20 to $13.70 as traded
Session open, high, low
$22.00, $22.00, $11.60
Opening gap
-9.09%
Close inside the session range
0.20 of the range, where 1.00 is the high
Session volume
380,726 shares, $5,215,946
Relative volume
50.3x 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
15
SMTSMore than one ranked move this month2+ ranked moves
-40.82%
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 21.0% bigger, at -49.39%.
Month end -58.16% on 2022-10-31
Close before and after
$0.4900 to $0.2900 as traded
Session open, high, low
$0.2999, $0.3472, $0.2600
Opening gap
-38.80%
Close inside the session range
0.34 of the range, where 1.00 is the high
Session volume
2,181,240 shares, $632,560
Relative volume
29.3x 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
16
SIENMore than one ranked move this month2+ ranked moves
-37.36%
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/11/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/20/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/20/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
76.6% of the drop was recovered five sessions later.
Month end -8.16% on 2022-10-31
Close before and after
$10.79 to $7.76 split-adjusted
Session open, high, low
$7.76, $8.15, $7.33
Opening gap
-28.08%
Close inside the session range
0.52 of the range, where 1.00 is the high
Session volume
244,474,604 shares, $1,897,122,927
Relative volume
8.5x 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
28
TSHAMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-27.52%
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 50.0% bigger, at -41.28%.
Month end -42.28% on 2022-10-31
This month ended before the fifth session after the move.
Close before and after
$2.98 to $2.16 split-adjusted
Session open, high, low
$2.52, $2.65, $2.12
Opening gap
-15.44%
Close inside the session range
0.08 of the range, where 1.00 is the high
Session volume
8,751,034 shares, $18,902,233
Relative volume
78.5x 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
29
SMTSMore than one ranked move this month2+ ranked moves
-27.42%
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/11/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/11/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 4.8% bigger, at -27.75%.
Month end -32.35% on 2022-10-31
Close before and after
$60.90 to $44.78 split-adjusted
Session open, high, low
$59.00, $59.00, $40.00
Opening gap
-3.12%
Close inside the session range
0.25 of the range, where 1.00 is the high
Session volume
40,866 shares, $1,829,979
Relative volume
6.4x 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
35
SIENMore than one ranked move this month2+ ranked moves
-26.40%
against the close of 10/20/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 36.7% bigger, at -32.98%.
Month end -25.53% on 2022-10-31
This month ended before the fifth session after the move.
Close before and after
$27.14 to $20.59 split-adjusted
Session open, high, low
$22.66, $22.75, $20.51
Opening gap
-16.51%
Close inside the session range
0.04 of the range, where 1.00 is the high
Session volume
3,455,499 shares, $71,148,724
Relative volume
7.0x 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
41
RKLYAlso on the opposite board this monthon both boards
-24.03%
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/20/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
5.7% of the drop was recovered five sessions later.
Month end -23.64% on 2022-10-31
Close before and after
$302.46 to $230.03 as traded
Session open, high, low
$255.00, $261.51, $228.52
Opening gap
-15.69%
Close inside the session range
0.05 of the range, where 1.00 is the high
Session volume
5,625,932 shares, $1,294,133,138
Relative volume
10.6x 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
ARBKMore than one ranked move this month2+ ranked moves
-23.26%
against the close of 10/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2022session 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 -30.75%.
Month end -49.17% on 2022-10-31
Close before and after
$6.00 to $4.75 as traded
Session open, high, low
$4.95, $4.95, $4.13
Opening gap
-17.50%
Close inside the session range
0.75 of the range, where 1.00 is the high
Session volume
326,546 shares, $1,549,461
Relative volume
3.6x 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
51
TSHAMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-20.83%
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
8.3% of the drop was recovered five sessions later.
Month end -16.65% on 2022-10-31
Close before and after
$30.82 to $24.57 split-adjusted
Session open, high, low
$28.56, $29.73, $24.50
Opening gap
-7.33%
Close inside the session range
0.01 of the range, where 1.00 is the high
Session volume
68,389 shares, $1,680,318
Relative volume
3.4x 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
53
LASEAlso on the opposite board this monthon both boards
-19.76%
against the close of 10/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/05/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 09/30/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
44.0% of the drop was recovered five sessions later.
Month end -11.68% on 2022-10-31
This month ended before the fifth session after the move.
Close before and after
$176.21 to $143.24 split-adjusted
Session open, high, low
$176.39, $176.81, $141.95
Opening gap
+0.10%
Close inside the session range
0.04 of the range, where 1.00 is the high
Session volume
1,742,944 shares, $249,659,299
Relative volume
5.8x 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
64
ACORAlso on the opposite board this monthon both boards
-18.62%
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 14.2% bigger, at -20.67%.
Month end -12.34% on 2022-10-31
This month ended before the fifth session after the move.
Close before and after
$221.64 to $181.53 split-adjusted
Session open, high, low
$188.89, $188.89, $176.00
Opening gap
-14.78%
Close inside the session range
0.43 of the range, where 1.00 is the high
Session volume
4,187,868 shares, $760,223,678
Relative volume
5.1x 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
68
AGFYAlso on the opposite board this monthon both boards
-18.07%
against the close of 10/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/24/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/05/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 1.1% bigger, at -16.61%.
Month end -10.86% on 2022-10-31
Close before and after
$134.73 to $112.59 as traded
Session open, high, low
$125.50, $132.41, $110.79
Opening gap
-6.85%
Close inside the session range
0.08 of the range, where 1.00 is the high
Session volume
5,905,488 shares, $664,898,894
Relative volume
5.9x 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
75
LITMAlso on the opposite board this monthon both boards
-16.18%
against the close of 10/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 45.0% bigger, at -22.14%.
Month end -33.60% on 2022-10-31
Close before and after
$1.31 to $1.11 split-adjusted
Session open, high, low
$1.38, $1.42, $1.02
Opening gap
+5.34%
Close inside the session range
0.23 of the range, where 1.00 is the high
Session volume
3,086,878 shares, $3,426,435
Relative volume
42.1x 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
83
BBLNAlso on the opposite board this monthon both boards
-15.20%
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/27/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/26/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/25/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 27.0% bigger, at -18.04%.
Month end -15.13% on 2022-10-31
This month ended before the fifth session after the move.
Close before and after
$76.56 to $65.68 split-adjusted
Session open, high, low
$68.00, $70.62, $64.05
Opening gap
-11.18%
Close inside the session range
0.25 of the range, where 1.00 is the high
Session volume
881,665 shares, $57,907,757
Relative volume
5.2x 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
96
AMPXAlso on the opposite board this monthon both boards
-14.17%
against the close of 10/19/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/18/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/24/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 10/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
39.8% of the drop was recovered five sessions later.
Month end -8.40% on 2022-10-31
Close before and after
$45.14 to $38.84 split-adjusted
Session open, high, low
$40.07, $40.83, $38.59
Opening gap
-11.23%
Close inside the session range
0.11 of the range, where 1.00 is the high
Session volume
5,777,559 shares, $224,400,392
Relative volume
3.3x 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
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.613 smaller events this month are held out of this month's eligible pool; switch to include them.280 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
1 candidate event for this board could not be anchored to a trading session and is not listed.
2 events were 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 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.
2 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 2022, the median decliner was 8.4% deeper below its pre-news close five sessions later; the largest catalyst group was Earnings, 39 of the 100 events, at a median of -18.7%.
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
98.0% of 100
2.9%deeper below baseline, of 100
Day +5
97.0% of 100
8.4%deeper below baseline, of 100
Month end
91.7% of 96
2.4%recovered, of 96
Month end falls before day +5 for 27 of these 96 events, so this row is not a later horizon than the one above it. 96 of the 100 events have a month-end close later than the measured session; 4 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 2022
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-market56.0%
Intraday7.0%
After hours37.0%
Volume against normal
Under 5x27 events, 27.3%
5x to 20x53 events, 53.5%
Over 20x19 events, 19.2%
1 event has too little trading history for a relative volume, and is not in the tiers above.
Industry
Pharmaceutical Preparations13 events, 13.0%
Biological Products, (no Diagnostic Substances)5 events, 5.0%
Surgical & Medical Instruments & Apparatus4 events, 4.0%
4 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 2022
100 events in the comparable window.
September 2022 median -19.3%, selected from the 7,654 events in that month's eligible pool
October 2022 median -20.9%, 1.6 points steeper than September 2022. October 2022's median is taken over the 100 ranked rows, selected from the 9,568 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.
