Ranked by the close-to-close change of the trading session each announcement landed in. How this is measured.
Data as of the trading session of
,
21
of 21 completed market sessions produced ranked moves.
That date is the last ranked session, not the last priced one, so follow-through dates run later.
On 100 of these rows the measured session was reconstructed from the announcement time, because it predates our stored session records.
Every percentage on a row, the follow-through readings included, is measured against that row's own pre-news close, which the row names. A day +5 reading is therefore the move from before the announcement, not a further change on top of the headline percentage.
Rows are ordered by the move measured when the board was ranked. A percentage recomputed from the session's own closing prices can sit a little above or below its neighbours; the rank is the one the measured move gave the row.
against the close of 06/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 0.9% bigger, at -78.81%.
Month end -71.48% on 2022-06-30
Close before and after
$128.85 to $28.20 split-adjusted
Session open, high, low
$47.40, $52.95, $27.30
Opening gap
-63.21%
Close inside the session range
0.04 of the range, where 1.00 is the high
Session volume
2,336,668 shares, $65,894,038
Relative volume
109.9x 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
2
CNXAMore than one ranked move this month2+ ranked moves
-71.03%
against the close of 06/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/01/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Other AnnouncementRelease reads positive, stock fell 45.42%
Five sessions later the drop was 15.4% bigger, at -52.40%.
Month end -67.63% on 2022-06-30
Close before and after
$11.03 to $6.02 as traded
Session open, high, low
$9.80, $9.80, $4.51
Opening gap
-11.15%
Close inside the session range
0.29 of the range, where 1.00 is the high
Session volume
7,246,106 shares, $43,621,558
Relative volume
23.6x 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
9
ASPNAlso on the opposite board this monthon both boards
-42.69%
against the close of 06/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 21.2% bigger, at -49.31%.
Month end -51.72% on 2022-06-30
Close before and after
$116.00 to $68.80 as traded
Session open, high, low
$78.80, $82.00, $67.20
Opening gap
-32.07%
Close inside the session range
0.11 of the range, where 1.00 is the high
Session volume
22,962 shares, $1,579,786
Relative volume
13.2x 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
12
FULCMore than one ranked move this month2+ ranked moves
-39.18%
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 10.4% bigger, at -43.26%.
Month end -39.43% on 2022-06-30
Close before and after
$8.09 to $4.92 split-adjusted
Session open, high, low
$6.68, $6.80, $3.21
Opening gap
-17.43%
Close inside the session range
0.48 of the range, where 1.00 is the high
Session volume
8,414,567 shares, $41,399,670
Relative volume
14.3x 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
BTCMMore than one ranked move this month2+ ranked moves
-39.07%
against the close of 06/22/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/15/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 53.4% bigger, at -56.38%.
Month end -36.75% on 2022-06-30same session
This month ended before the fifth session after the move.
Close before and after
$71.30 to $45.10 as traded
Session open, high, low
$70.70, $72.10, $43.50
Opening gap
-0.84%
Close inside the session range
0.06 of the range, where 1.00 is the high
Session volume
18,093 shares, $815,994
Relative volume
2.8x 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
16
BTCMMore than one ranked move this month2+ ranked moves
-36.60%
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 1.4% bigger, at -37.11%.
Month end -68.04% on 2022-06-30
Close before and after
$19.40 to $12.30 as traded
Session open, high, low
$17.40, $17.70, $11.80
Opening gap
-10.31%
Close inside the session range
0.08 of the range, where 1.00 is the high
Session volume
235,753 shares, $2,899,762
Relative volume
3.2x 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
17
BOXDMore than one ranked move this month2+ ranked moves
-35.21%
against the close of 06/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 111.3% bigger, at -74.41%.
Month end -66.42% on 2022-06-30
Close before and after
$5.51 to $3.57 as traded
Session open, high, low
$4.92, $4.99, $3.43
Opening gap
-10.71%
Close inside the session range
0.09 of the range, where 1.00 is the high
Session volume
4,958,030 shares, $17,700,167
Relative volume
14.5x 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
18
QTNTAlso on the opposite board this monthon both boards
-35.00%
against the close of 06/23/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/15/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/23/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/27/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/01/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 29.8% bigger, at -35.24%.
Month end -36.89% on 2022-06-30
This month ended before the fifth session after the move.
Close before and after
$8.24 to $6.00 as traded
Session open, high, low
$7.60, $7.60, $5.27
Opening gap
-7.77%
Close inside the session range
0.32 of the range, where 1.00 is the high
Session volume
168,613 shares, $1,012,352
Relative volume
20.7x 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
28
BSGMAlso on the opposite board this monthon both boards
-26.29%
against the close of 06/23/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 20.4% bigger, at -29.09%.
Month end -35.37% on 2022-06-30
Close before and after
$0.8200 to $0.6218 split-adjusted
Session open, high, low
$0.6300, $0.7190, $0.5700
Opening gap
-23.17%
Close inside the session range
0.35 of the range, where 1.00 is the high
Session volume
6,512,381 shares, $4,049,399
Relative volume
20.6x 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
33
AERCAlso on the opposite board this monthon both boards
-23.72%
against the close of 06/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/31/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/23/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
53.3% of the drop was recovered five sessions later.
Month-end is not shown: no closing price is available for 2022-06-30.
Close before and after
$60.55 to $47.80 split-adjusted
Session open, high, low
$49.30, $50.24, $47.80
Opening gap
-18.58%
Close inside the session range
0.00 of the range, where 1.00 is the high
Session volume
2,269 shares, $108,458
Relative volume
8.3x 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
46
ACERAlso on the opposite board this monthon both boards
-21.02%
against the close of 06/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/02/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/21/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 69.7% bigger, at -32.65%.
Month end -44.48% on 2022-06-30
Close before and after
$126.80 to $102.40 split-adjusted
Session open, high, low
$110.60, $111.00, $92.60
Opening gap
-12.78%
Close inside the session range
0.53 of the range, where 1.00 is the high
Session volume
70,176 shares, $7,186,022
Relative volume
3.3x 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
60
VIEWAlso on the opposite board this monthon both boards
-19.15%
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/31/2022session 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 34.97% above the pre-news price.
Month end +118.21% on 2022-06-30
Close before and after
$5.49 to $4.45 split-adjusted
Session open, high, low
$5.47, $5.56, $4.41
Opening gap
-0.36%
Close inside the session range
0.03 of the range, where 1.00 is the high
Session volume
194,415 shares, $865,147
Relative volume
0.9x 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
63
BOXDMore than one ranked move this month2+ ranked moves
-18.77%
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/14/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/15/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/15/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/02/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/31/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/03/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/22/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/24/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/13/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/31/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/31/2022session 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 30.03% above the pre-news price.
Month end +80.18% on 2022-06-30
Close before and after
$6.76 to $5.73 split-adjusted
Session open, high, low
$6.84, $6.87, $5.72
Opening gap
+1.18%
Close inside the session range
0.01 of the range, where 1.00 is the high
Session volume
56,546 shares, $324,009
Relative volume
0.9x 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
87
CNXAMore than one ranked move this month2+ ranked moves
-15.23%
against the close of 06/15/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/28/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/24/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 37.4% bigger, at -20.65%.
Month end -21.70% on 2022-06-30
This month ended before the fifth session after the move.
Close before and after
$13.92 to $11.83 as traded
Session open, high, low
$14.13, $14.70, $11.62
Opening gap
+1.47%
Close inside the session range
0.07 of the range, where 1.00 is the high
Session volume
146,669 shares, $1,734,728
Relative volume
1.6x 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
90
KSCPAlso on the opposite board this monthon both boards
-14.89%
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/06/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
11.6% of the drop was recovered five sessions later.
Month end -13.83% on 2022-06-30
Close before and after
$29.71 to $25.32 split-adjusted
Session open, high, low
$25.29, $27.38, $24.73
Opening gap
-14.88%
Close inside the session range
0.22 of the range, where 1.00 is the high
Session volume
21,634,802 shares, $547,793,187
Relative volume
2.7x 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
93
FULCMore than one ranked move this month2+ ranked moves
-14.63%
against the close of 06/10/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/29/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/09/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/15/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/16/2022session 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 7.14% above the pre-news price.
Month end +10.90% on 2022-06-30
Close before and after
$2.66 to $2.28 as traded
Session open, high, low
$2.65, $2.67, $2.28
Opening gap
-0.38%
Close inside the session range
0.00 of the range, where 1.00 is the high
Session volume
26,608 shares, $60,666
Relative volume
4.1x 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
98
ZENAlso on the opposite board this monthon both boards
-14.26%
against the close of 06/08/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/17/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 06/07/2022session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 125.7% bigger, at -31.75%.
Month end -29.60% on 2022-06-30
Close before and after
$27.94 to $24.01 split-adjusted
Session open, high, low
$25.80, $25.90, $22.82
Opening gap
-7.66%
Close inside the session range
0.39 of the range, where 1.00 is the high
Session volume
597,590 shares, $14,348,136
Relative volume
4.8x 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
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.549 smaller events this month are held out of this month's eligible pool; switch to include them.207 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.
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.
1 event was left out of this board because the ticker had not traded for more than 10 days before the measured session, so no comparable prior close exists.
Company names are not shown on months older than a year, because only the current holder of each ticker is known.
Whole board, unfiltered
In June 2022, the median decliner was 2.5% deeper below its pre-news close five sessions later; the largest catalyst group was Other Announcement, 28 of the 100 events, at a median of -18.1%.
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
100.0% of 100
4.1%deeper below baseline, of 100
Day +5
92.0% of 100
2.5%deeper below baseline, of 100
Month end
89.8% of 88
24.0%deeper below baseline, of 88
Month end falls before day +5 for 13 of these 88 events, so this row is not a later horizon than the one above it. 88 of the 100 events have a month-end close later than the measured session; 11 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 June 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-market51.0%
Intraday10.0%
After hours39.0%
Volume against normal
Under 5x43 events, 43.0%
5x to 20x40 events, 40.0%
Over 20x17 events, 17.0%
Industry
Pharmaceutical Preparations18 events, 18.0%
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 May 2022
100 events in the comparable window.
May 2022 median -28.6%, selected from the 11,368 events in that month's eligible pool
June 2022 median -20.7%, 7.9 points shallower than May 2022. June 2022's median is taken over the 100 ranked rows, selected from the 7,855 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.
