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 04/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
1.8% of the drop was recovered five sessions later.
Month end -70.05% on 2023-04-28
Close before and after
$6.51 to $2.08 as traded
Session open, high, low
$2.59, $2.60, $2.00
Opening gap
-60.22%
Close inside the session range
0.13 of the range, where 1.00 is the high
Session volume
6,138,621 shares, $12,768,332
Relative volume
799.0x 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
2
HILSAlso on the opposite board this monthon both boards
-59.49%
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 55.6% bigger, at -78.76%.
Month-end is not shown: no closing price is available for 2023-04-28.
Close before and after
$0.2250 to $0.1111 as traded
Session open, high, low
$0.1579, $0.1800, $0.1061
Opening gap
-29.82%
Close inside the session range
0.07 of the range, where 1.00 is the high
Session volume
71,011,369 shares, $7,889,363
Relative volume
122.4x 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
5
PLXPMore than one ranked move this month2+ ranked moves
-49.43%
against the close of 04/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 11.8% bigger, at -51.75%.
Month end -49.95% on 2023-04-28
This month ended before the fifth session after the move.
Close before and after
$0.8191 to $0.4400 as traded
Session open, high, low
$0.7510, $0.8700, $0.4271
Opening gap
-8.31%
Close inside the session range
0.03 of the range, where 1.00 is the high
Session volume
694,308 shares, $305,496
Relative volume
66.2x 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
9
BBBYMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-43.82%
against the close of 04/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 03/31/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 16.6% bigger, at -41.76%.
Month end -54.83% on 2023-04-28
Close before and after
$52.80 to $33.90 split-adjusted
Session open, high, low
$36.00, $37.35, $33.30
Opening gap
-31.82%
Close inside the session range
0.15 of the range, where 1.00 is the high
Session volume
347,213 shares, $11,770,521
Relative volume
44.3x 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
16
BBBYMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-35.68%
against the close of 04/21/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 19.1% bigger, at -39.12%.
Month end -7.76% on 2023-04-28
This month ended before the fifth session after the move.
Close before and after
$22.18 to $14.89 as traded
Session open, high, low
$20.83, $21.09, $14.45
Opening gap
-6.09%
Close inside the session range
0.07 of the range, where 1.00 is the high
Session volume
73,583 shares, $1,095,835
Relative volume
6.0x 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
19
VERBMore than one ranked move this monthrelease reads positive2+ ranked moves
-32.52%
against the close of 04/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Other AnnouncementRelease reads positive, stock fell 32.52%
against the close of 03/31/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/14/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/06/2023session 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 -39.36%.
Month end -39.78% on 2023-04-28
Close before and after
$1.05 to $0.7200 as traded
Session open, high, low
$0.7584, $0.8240, $0.6800
Opening gap
-27.69%
Close inside the session range
0.28 of the range, where 1.00 is the high
Session volume
782,842 shares, $563,646
Relative volume
34.7x 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
23
AGFYAlso on the opposite board this monthon both boards
-30.33%
against the close of 04/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 11.8% bigger, at -33.20%.
Month end -25.00% on 2023-04-28
Close before and after
$10.00 to $7.03 split-adjusted
Session open, high, low
$9.70, $9.70, $6.30
Opening gap
-3.00%
Close inside the session range
0.21 of the range, where 1.00 is the high
Session volume
554,703 shares, $3,899,562
Relative volume
39.5x 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
25
VORBMore than one ranked move this month2+ ranked moves
-29.55%
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Month-end is not shown: no closing price is available for 2023-04-28.
Close before and after
$0.1675 to $0.1180 as traded
Session open, high, low
$0.1281, $0.1305, $0.1125
Opening gap
-23.52%
Close inside the session range
0.31 of the range, where 1.00 is the high
Session volume
42,926,725 shares, $5,065,354
Relative volume
2.2x 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
26
SFRMore than one ranked move this month2+ ranked moves
-28.81%
against the close of 04/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 103.7% bigger, at -58.69%.
Month end -60.95% on 2023-04-28
This month ended before the fifth session after the move.
Close before and after
$1.77 to $1.26 as traded
Session open, high, low
$1.75, $1.95, $1.05
Opening gap
-1.13%
Close inside the session range
0.23 of the range, where 1.00 is the high
Session volume
1,658,046 shares, $2,089,138
Relative volume
41.6x 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
27
PLXPMore than one ranked move this month2+ ranked moves
-27.80%
against the close of 04/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Month-end is not shown: no closing price is available for 2023-04-28.
Close before and after
$0.1205 to $0.0870 as traded
Session open, high, low
$0.0953, $0.1555, $0.0825
Opening gap
-20.91%
Close inside the session range
0.06 of the range, where 1.00 is the high
Session volume
50,382,179 shares, $4,383,250
Relative volume
168.9x 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
28
SFRMore than one ranked move this month2+ ranked moves
-27.78%
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/20/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
23.4% of the drop was recovered five sessions later.
Month end -14.99% on 2023-04-28
This month ended before the fifth session after the move.
Close before and after
$35.75 to $26.70 split-adjusted
Session open, high, low
$30.70, $30.70, $25.29
Opening gap
-14.13%
Close inside the session range
0.26 of the range, where 1.00 is the high
Session volume
2,204,691 shares, $58,865,250
Relative volume
5.6x 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
37
QBTSMore than one ranked move this month2+ ranked moves
-24.83%
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/14/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 47.5% bigger, at -35.14%.
Month end -39.64% on 2023-04-28
Close before and after
$15.11 to $11.51 split-adjusted
Session open, high, low
$11.28, $11.71, $10.62
Opening gap
-25.35%
Close inside the session range
0.82 of the range, where 1.00 is the high
Session volume
5,745,780 shares, $66,133,928
Relative volume
14.6x 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
GSMGAlso on the opposite board this monthon both boards
-23.63%
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
It recovered the whole drop and closed 4.50% above the pre-news price.
Month end +7.63% on 2023-04-28
Close before and after
$51.10 to $39.10 split-adjusted
Session open, high, low
$40.80, $44.50, $38.80
Opening gap
-20.16%
Close inside the session range
0.05 of the range, where 1.00 is the high
Session volume
9,033,955 shares, $353,227,641
Relative volume
4.5x 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
45
QBTSMore than one ranked move this month2+ ranked moves
-23.28%
against the close of 04/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
39.6% of the drop was recovered five sessions later.
Month end -23.71% on 2023-04-28
Close before and after
$0.6517 to $0.5000 split-adjusted
Session open, high, low
$0.6632, $0.6662, $0.4912
Opening gap
+1.76%
Close inside the session range
0.05 of the range, where 1.00 is the high
Session volume
3,456,959 shares, $1,728,480
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
46
VORBMore than one ranked move this month2+ ranked moves
-23.20%
against the close of 04/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 03/31/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 49.7% bigger, at -32.91%.
Month end -33.33% on 2023-04-28
Close before and after
$0.9450 to $0.7372 as traded
Session open, high, low
$0.9500, $0.9763, $0.7025
Opening gap
+0.53%
Close inside the session range
0.13 of the range, where 1.00 is the high
Session volume
276,426 shares, $203,781
Relative volume
13.3x 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
52
ANVSAlso on the opposite board this monthon both boards
-21.54%
against the close of 03/31/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/21/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/18/2023session 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
Five sessions later the drop was 39.8% bigger, at -28.78%.
Month end -28.79% on 2023-04-28
Close before and after
$1.36 to $1.08 split-adjusted
Session open, high, low
$1.38, $1.38, $0.9411
Opening gap
+1.47%
Close inside the session range
0.32 of the range, where 1.00 is the high
Session volume
600,736 shares, $648,795
Relative volume
7.6x 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
58
IMBILAlso on the opposite board this monthon both boards
-20.46%
against the close of 04/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session 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 -17.80% on 2023-04-28same session
This month ended before the fifth session after the move.
Close before and after
$18.76 to $15.42 split-adjusted
Session open, high, low
$19.02, $19.28, $15.02
Opening gap
+1.39%
Close inside the session range
0.09 of the range, where 1.00 is the high
Session volume
685,441 shares, $10,569,500
Relative volume
3.0x 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
69
IFRXAlso on the opposite board this monthon both boards
-17.67%
against the close of 04/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 15.7% bigger, at -20.33%.
Month end -17.81% on 2023-04-28
This month ended before the fifth session after the move.
Close before and after
$29.36 to $24.20 split-adjusted
Session open, high, low
$26.11, $27.13, $23.85
Opening gap
-11.07%
Close inside the session range
0.11 of the range, where 1.00 is the high
Session volume
2,734,830 shares, $66,182,886
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
71
VERBMore than one ranked move this month2+ ranked moves
-17.42%
against the close of 04/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 111.1% bigger, at -36.77%.
Month end -33.23% on 2023-04-28
Close before and after
$620.00 to $512.00 as traded
Session open, high, low
$614.00, $619.72, $504.02
Opening gap
-0.97%
Close inside the session range
0.07 of the range, where 1.00 is the high
Session volume
1,069 shares, $547,328
Relative volume
5.7x 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
72
ZFOXAlso on the opposite board this monthon both boards
-17.42%
against the close of 04/21/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/21/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
FDA & Regulatorycatalyst from a later release the same session
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/20/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 03/31/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
1.1% of the drop was recovered five sessions later.
Month end -19.80% on 2023-04-28
Close before and after
$18.03 to $15.14 split-adjusted
Session open, high, low
$16.22, $16.66, $15.04
Opening gap
-10.04%
Close inside the session range
0.06 of the range, where 1.00 is the high
Session volume
20,450,487 shares, $309,620,373
Relative volume
9.8x 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
87
KRUSAlso on the opposite board this monthon both boards
-16.00%
against the close of 04/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 03/31/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 48.3% bigger, at -22.89%.
Month end -25.56% on 2023-04-28
Close before and after
$39.32 to $33.25 as traded
Session open, high, low
$38.59, $38.59, $30.06
Opening gap
-1.86%
Close inside the session range
0.37 of the range, where 1.00 is the high
Session volume
3,395,471 shares, $112,899,411
Relative volume
7.6x 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
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.727 smaller events this month are held out of this month's eligible pool; switch to include them.270 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.
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.
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.
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.
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 April 2023, the median decliner was 16.6% deeper below its pre-news close five sessions later; the largest catalyst group was Earnings, 38 of the 100 events, at a median of -21.2%.
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
6
6.0%
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.
Median change since the measured close as a share of the drop
Day +1
99.0% of 99
1.8%deeper below baseline, of 99
Day +5
95.8% of 95
16.6%deeper below baseline, of 95
Month end
94.1% of 85
4.3%deeper below baseline, of 85
Month end falls before day +5 for 30 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; 9 have it on the measured session itself, and 6 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 April 2023
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-market42.0%
Intraday7.0%
After hours51.0%
Volume against normal
Under 5x27 events, 27.0%
5x to 20x49 events, 49.0%
Over 20x24 events, 24.0%
Industry
Pharmaceutical Preparations14 events, 14.0%
Services-prepackaged Software4 events, 4.0%
Biological Products, (no Diagnostic Substances)3 events, 3.0%
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 March 2023
100 events in the comparable window.
March 2023 median -29.1%, selected from the 9,373 events in that month's eligible pool
April 2023 median -22.1%, 7.0 points shallower than March 2023. April 2023's median is taken over the 100 ranked rows, selected from the 9,279 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.