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 20 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 01/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 5.8% bigger, at -80.91%.
Month end -81.56% on 2023-01-31
Close before and after
$10.79 to $2.54 split-adjusted
Session open, high, low
$2.37, $2.83, $2.32
Opening gap
-78.04%
Close inside the session range
0.43 of the range, where 1.00 is the high
Session volume
28,551,518 shares, $72,520,856
Relative volume
39.8x 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
2
BTBMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-69.43%
against the close of 01/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
17.2% of the drop was recovered five sessions later.
Month end -45.82% on 2023-01-31
Close before and after
$11.00 to $4.24 split-adjusted
Session open, high, low
$4.38, $4.55, $4.02
Opening gap
-60.18%
Close inside the session range
0.42 of the range, where 1.00 is the high
Session volume
33,570,121 shares, $142,337,313
Relative volume
12.5x 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
5
SIDUMore than one ranked move this month2+ ranked moves
-53.94%
against the close of 01/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
57.9% of the drop was recovered five sessions later.
Month end -53.94% on 2023-01-31same session
This month ended before the fifth session after the move.
Close before and after
$89.01 to $41.00 split-adjusted
Session open, high, low
$38.30, $44.00, $37.50
Opening gap
-56.97%
Close inside the session range
0.54 of the range, where 1.00 is the high
Session volume
217,539 shares, $8,919,099
Relative volume
56.5x 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
6
VERBAlso on the opposite board this monthon both boards
-47.63%
against the close of 01/23/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 42.5% bigger, at -47.90%.
Month end -46.48% on 2023-01-31
Close before and after
$10.50 to $6.97 split-adjusted
Session open, high, low
$6.42, $6.98, $5.81
Opening gap
-38.86%
Close inside the session range
0.99 of the range, where 1.00 is the high
Session volume
4,634,940 shares, $32,305,532
Relative volume
16.3x 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
13
BREAMore than one ranked move this month2+ ranked moves
-32.78%
against the close of 01/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 24.0% bigger, at -40.66%.
Month end -46.47% on 2023-01-31
This month ended before the fifth session after the move.
Close before and after
$4.82 to $3.24 as traded
Session open, high, low
$3.40, $3.79, $2.81
Opening gap
-29.46%
Close inside the session range
0.44 of the range, where 1.00 is the high
Session volume
496,498 shares, $1,608,654
Baseline gap
3 calendar days from the pre-news close to the measured session
14
KERNAlso on the opposite board this monthrelease reads positiveon both boards
-31.46%
against the close of 01/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Other AnnouncementRelease reads positive, stock fell 31.11%
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 2.5% bigger, at -31.56%.
Month end -32.32% on 2023-01-31
Close before and after
$2.63 to $1.82 split-adjusted
Session open, high, low
$1.50, $2.00, $1.45
Opening gap
-42.97%
Close inside the session range
0.67 of the range, where 1.00 is the high
Session volume
7,928,206 shares, $14,429,335
Relative volume
8.7x 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
19
BBBYAlso on the opposite board this monthon both boards
-29.87%
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 0.3% bigger, at -29.43%.
Month end -24.72% on 2023-01-31
Close before and after
$37.34 to $26.38 as traded
Session open, high, low
$27.03, $31.14, $24.33
Opening gap
-27.61%
Close inside the session range
0.30 of the range, where 1.00 is the high
Session volume
600,493 shares, $15,841,005
Relative volume
16.1x 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
21
BTBMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-29.21%
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/20/2023session 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 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
45.1% of the drop was recovered five sessions later.
Month end -17.61% on 2023-01-31
Close before and after
$30.21 to $23.23 split-adjusted
Session open, high, low
$29.00, $29.25, $20.98
Opening gap
-4.01%
Close inside the session range
0.27 of the range, where 1.00 is the high
Session volume
2,151,316 shares, $49,975,071
Relative volume
15.6x 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
28
HOLOAlso on the opposite board this monthon both boards
-23.08%
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 11.4% bigger, at -25.70%.
Month end -21.33% on 2023-01-31
This month ended before the fifth session after the move.
Close before and after
$91,520.00 to $70,400.00 split-adjusted
Session open, high, low
$86,320.00, $95,376.00, $69,440.00
Opening gap
-5.68%
Close inside the session range
0.04 of the range, where 1.00 is the high
Session volume
57 shares, $4,012,800
Relative volume
1.0x 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
29
GERNAlso on the opposite board this monthon both boards
-22.26%
against the close of 01/04/2023session 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 0.94% above the pre-news price.
Month end +3.45% on 2023-01-31
Close before and after
$3.19 to $2.48 split-adjusted
Session open, high, low
$3.00, $3.02, $2.34
Opening gap
-5.96%
Close inside the session range
0.21 of the range, where 1.00 is the high
Session volume
37,685,501 shares, $93,460,042
Relative volume
7.5x 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
30
BBAIAlso on the opposite board this monthon both boards
-22.18%
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Offering / Dilutioncatalyst from a later release the same session
Five sessions later the drop was 6.8% bigger, at -22.49%.
Month end -22.15% on 2023-01-31
Close before and after
$35.30 to $27.87 as traded
Session open, high, low
$27.16, $28.80, $26.11
Opening gap
-23.06%
Close inside the session range
0.65 of the range, where 1.00 is the high
Session volume
1,760,836 shares, $49,074,499
Relative volume
27.4x 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
BREAMore than one ranked move this month2+ ranked moves
-20.37%
against the close of 01/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
65.4% of the drop was recovered five sessions later.
Month end -7.71% on 2023-01-31
This month ended before the fifth session after the move.
Close before and after
$3.76 to $3.01 as traded
Session open, high, low
$3.00, $3.30, $2.87
Opening gap
-20.21%
Close inside the session range
0.33 of the range, where 1.00 is the high
Session volume
919,569 shares, $2,767,903
Relative volume
8.4x 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
38
GNSAlso on the opposite board this monthon both boards
-19.27%
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/23/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/20/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/20/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 42.0% bigger, at -24.73%.
Month end -12.90% on 2023-01-31
Close before and after
$11.20 to $9.25 as traded
Session open, high, low
$13.27, $16.98, $9.23
Opening gap
+18.48%
Close inside the session range
0.00 of the range, where 1.00 is the high
Session volume
134,670 shares, $1,245,698
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
52
ATNFAlso on the opposite board this monthon both boards
-17.36%
against the close of 01/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Offering / Dilutioncatalyst from a later release the same session
17.3% of the drop was recovered five sessions later.
Month end +0.15% on 2023-01-31
Close before and after
$6.69 to $5.59 split-adjusted
Session open, high, low
$6.08, $6.13, $5.42
Opening gap
-9.12%
Close inside the session range
0.24 of the range, where 1.00 is the high
Session volume
87,198,027 shares, $487,436,971
Relative volume
4.6x 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
61
NVCRAlso on the opposite board this monthon both boards
-16.32%
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
29.1% of the drop was recovered five sessions later.
Month end -15.58% on 2023-01-31
This month ended before the fifth session after the move.
Close before and after
$16.43 to $13.89 as traded
Session open, high, low
$16.08, $16.15, $13.86
Opening gap
-2.13%
Close inside the session range
0.01 of the range, where 1.00 is the high
Session volume
1,737,688 shares, $24,136,486
Relative volume
3.0x 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
68
HLBZMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-15.12%
against the close of 01/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 20.9% bigger, at -17.84%.
Month end -11.35% on 2023-01-31
This month ended before the fifth session after the move.
Close before and after
$48.53 to $41.37 split-adjusted
Session open, high, low
$48.00, $48.00, $40.81
Opening gap
-1.09%
Close inside the session range
0.08 of the range, where 1.00 is the high
Session volume
93,445 shares, $3,865,820
Relative volume
4.9x 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
72
GRRRAlso on the opposite board this monthon both boards
-14.68%
against the close of 01/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
92.9% of the drop was recovered five sessions later.
Month end -7.04% on 2023-01-31
Close before and after
$7.96 to $6.82 split-adjusted
Session open, high, low
$8.06, $8.06, $6.40
Opening gap
+1.26%
Close inside the session range
0.25 of the range, where 1.00 is the high
Session volume
761,768 shares, $5,195,258
Relative volume
6.7x the median of the 20 sessions before the pre-news close
Baseline gap
3 calendar days from the pre-news close to the measured session
77
SIDUMore than one ranked move this month2+ ranked moves
-14.18%
against the close of 01/13/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
68.8% of the drop was recovered five sessions later.
Month end -25.65% on 2023-01-31
Close before and after
$11.30 to $9.70 split-adjusted
Session open, high, low
$11.20, $11.40, $9.31
Opening gap
-0.88%
Close inside the session range
0.19 of the range, where 1.00 is the high
Session volume
138,342 shares, $1,342,056
Relative volume
3.6x 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
79
AKLIAlso on the opposite board this monthon both boards
-14.07%
against the close of 01/05/2023session 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 9.63% above the pre-news price.
Month end +17.04% on 2023-01-31
Close before and after
$1.35 to $1.16 as traded
Session open, high, low
$1.30, $1.30, $1.07
Opening gap
-3.70%
Close inside the session range
0.39 of the range, where 1.00 is the high
Session volume
399,506 shares, $463,427
Relative volume
3.5x 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
80
VORBAlso on the opposite board this monthon both boards
-13.99%
against the close of 01/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/06/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
38.2% of the drop was recovered five sessions later.
Month end -7.91% on 2023-01-31
This month ended before the fifth session after the move.
Close before and after
$27.17 to $23.74 as traded
Session open, high, low
$26.87, $26.87, $23.45
Opening gap
-1.10%
Close inside the session range
0.09 of the range, where 1.00 is the high
Session volume
499,966 shares, $11,869,193
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
96
HLBZMore than one ranked move this monthAlso on the opposite board this month2+ ranked moveson both boards
-12.59%
against the close of 01/27/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 01/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 12/30/2022session 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
71.2% of the drop was recovered five sessions later.
Month end +40.62% on 2023-01-31
Close before and after
$123.18 to $108.10 split-adjusted
Session open, high, low
$118.47, $118.80, $104.64
Opening gap
-3.82%
Close inside the session range
0.24 of the range, where 1.00 is the high
Session volume
231,402,818 shares, $25,014,644,626
Relative volume
1.7x 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
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.262 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
3 candidate events for this board could not be anchored to a trading session and are not listed.
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 January 2023, the median decliner had recovered 17.3% of its drop five sessions later; the largest catalyst group was Other Announcement, 33 of the 100 events, at a median of -15.7%.
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.
Fewer than 10 events in this group, so no figures are shown.
M&A / Acquisition
4
4.0%
Fewer than 10 events in this group, so no figures are shown.
The day +5 figures are measured over the events in each group that have a five-session close, the count printed beside them, not over every event in the group.
Median change since the measured close as a share of the drop
Day +1
96.0% of 99
1.2%recovered, of 99
Day +5
87.9% of 99
17.3%recovered, of 99
Month end
79.2% of 96
21.0%recovered, of 96
Month end falls before day +5 for 21 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; 3 have it on the measured session itself, and 1 has 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 January 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-market49.0%
Intraday6.0%
After hours45.0%
Volume against normal
Under 5x34 events, 34.7%
5x to 20x48 events, 49.0%
Over 20x16 events, 16.3%
2 events have too little trading history for a relative volume, and are not in the tiers above.
Industry
Pharmaceutical Preparations20 events, 20.0%
Surgical & Medical Instruments & Apparatus8 events, 8.0%
Biological Products, (no Diagnostic Substances)4 events, 4.0%
Services-prepackaged Software3 events, 3.0%
Biological Products, (no Disgnostic Substances)2 events, 2.0%
Radiotelephone Communications2 events, 2.0%
30 other industries, 31 events
Industry not known: 30.0%
5 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 December 2022
100 events in the comparable window.
December 2022 median -26.1%, selected from the 5,912 events in that month's eligible pool
January 2023 median -17.4%, 8.7 points shallower than December 2022. January 2023's median is taken over the 100 ranked rows, selected from the 8,124 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.
