May 2023 Stock Losers on News, Micro Caps Included
Ranked by the close-to-close change of the trading session each announcement landed in. How this is measured.
Data through the
session.
22
of 22 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 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/02/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/28/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 19.0% bigger, at -54.45%.
Month end -70.10% on
Close before and after
$20.10 to $10.90 split-adjusted
Session open, high, low
$21.20, $22.25, $10.00
Opening gap
+5.47%
Close inside the session range
0.07 of the range, where 1.00 is the high
Session volume
668,032 shares, $7,281,549
Baseline gap
3 calendar days from the pre-news close to the measured session
13
NEPTMore than one ranked move this month2+ ranked moves
-45.68%
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
18.9% of the drop was recovered five sessions later.
Month end -36.66% on
This month ended before the fifth session after the move.
Close before and after
$14.43 to $8.23 split-adjusted
Session open, high, low
$9.14, $9.20, $8.10
Opening gap
-36.66%
Close inside the session range
0.12 of the range, where 1.00 is the high
Session volume
20,700,494 shares, $170,365,066
Relative volume
16.9x 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
18
QTEKMore than one ranked move this month2+ ranked moves
-40.27%
against the close of 05/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
70.2x 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
19
BIOLMore than one ranked move this month2+ ranked moves
-39.91%
against the close of 05/23/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
2.5% of the drop was recovered five sessions later.
Month end -41.70% on
This month ended before the fifth session after the move.
Close before and after
$13.98 to $8.40 as traded
Session open, high, low
$9.70, $9.70, $7.10
Opening gap
-30.62%
Close inside the session range
0.50 of the range, where 1.00 is the high
Session volume
489,439 shares, $4,111,288
Relative volume
30.3x 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
20
IONMMore than one ranked move this month2+ ranked moves
-39.90%
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 14.9% bigger, at -44.62%.
Month end -47.51% on
Close before and after
$6.23 to $3.81 split-adjusted
Session open, high, low
$3.91, $4.21, $3.46
Opening gap
-37.24%
Close inside the session range
0.47 of the range, where 1.00 is the high
Session volume
7,885,081 shares, $30,042,159
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
24
QTEKMore than one ranked move this month2+ ranked moves
-38.70%
against the close of 05/23/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/26/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/23/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 04/28/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/16/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/16/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/22/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
FDA & RegulatoryRelease reads positive, stock fell 32.83%
against the close of 05/02/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/22/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/08/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/19/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/17/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/30/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/08/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/08/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/18/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
66.1% of the drop was recovered five sessions later.
Month end -20.39% on
Close before and after
$30.90 to $22.50 as traded
Session open, high, low
$28.80, $28.80, $20.70
Opening gap
-6.80%
Close inside the session range
0.22 of the range, where 1.00 is the high
Session volume
145,839 shares, $3,281,378
Relative volume
11.5x 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
74
IONMMore than one ranked move this month2+ ranked moves
-26.91%
against the close of 05/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/25/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/08/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/08/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/02/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/05/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/08/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 10.0% bigger, at -28.23%.
Month end -31.61% on
Close before and after
$34.33 to $25.52 split-adjusted
Session open, high, low
$24.00, $25.64, $23.03
Opening gap
-30.09%
Close inside the session range
0.95 of the range, where 1.00 is the high
Session volume
983,634 shares, $25,102,340
Relative volume
6.9x 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
NEPTMore than one ranked move this monthrelease reads positive2+ ranked moves
-25.59%
against the close of 05/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Other AnnouncementRelease reads positive, stock fell 25.59%
against the close of 05/24/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/11/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/01/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/15/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/16/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 75.4% bigger, at -43.34%.
Month end -51.06% on
Close before and after
$14.00 to $10.54 as traded
Session open, high, low
$13.60, $14.06, $10.32
Opening gap
-2.86%
Close inside the session range
0.06 of the range, where 1.00 is the high
Session volume
749,480 shares, $7,899,519
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
94
BIOLMore than one ranked move this month2+ ranked moves
-24.69%
against the close of 05/04/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/03/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/12/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/09/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/22/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/02/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
against the close of 05/10/2023session reconstructedSession detailMarket cap is not shown on months older than a year, because only today's figure exists.
Five sessions later the drop was 18.6% bigger, at -28.09%.
Month end -31.30% on
Close before and after
$21.15 to $16.14 split-adjusted
Session open, high, low
$17.00, $17.69, $15.68
Opening gap
-19.62%
Close inside the session range
0.23 of the range, where 1.00 is the high
Session volume
16,390,788 shares, $264,547,318
Relative volume
12.9x 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
NYSE and Nasdaq companies with a market capitalization of $5M or more, measured today, including the $5M to $25M band. 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.329 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.Exclude the $5M to $25M band
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.
3 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 May 2023, the median decliner’s drop was 12.0% larger five sessions later; the largest catalyst group was Earnings, 48 of the 100 events, at a median of -27.5%.
Close-to-close change on the measured trading session, against the previous close.
NYSE and Nasdaq companies with a market capitalization of $5M or more, measured today, including the $5M to $25M band. The exchange is the one recorded on each announcement, and a release naming several tickers records one venue for all of them. A session that changed hands for less than $25,000 in total is not ranked, because a percentage set by a handful of shares is a print rather than a move. On a board older than a year a fund is identified by its name alone, because an instrument class describes whoever holds the ticker today.
Median change since the measured close as a share of the drop
Day +1
99.0% of 100
3.0%larger drop, of 100
Day +5
96.0% of 99
12.0%larger drop, of 99
Month end
93.6% of 94
21.0%larger drop, of 94
Month end falls before day +5 for 13 of these 94 events, so this row is not a later horizon than the one above it. 94 of the 100 events have a month-end close later than the measured session; 4 have it on the measured session itself, and 2 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 May 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-market46.0%
Intraday3.0%
After hours51.0%
Volume against normal
Under 5x16 events, 16.5%
5x to 20x51 events, 52.6%
Over 20x30 events, 30.9%
3 events have too little trading history for a relative volume, and are not in the tiers above.
Industry
Pharmaceutical preparations11 events, 11.0%
Surgical & medical instruments & apparatus8 events, 8.0%
8 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 April 2023
100 events from April 2023 in the comparable window.
April 2023 median -26.2%, selected from the 8,149 events in that month's eligible pool.
May 2023 median -31.8%, 5.6 points steeper than April 2023. May 2023's median is taken over the 100 ranked rows, selected from the 10,523 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 $5M or more, measured today, including the $5M to $25M band. 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.
