No percentage is shown because no filed share count exists for MEDX at SEC XBRL. A percentage of an unknown denominator is not a smaller version of the right answer.
As of the 2026-09-30 settlement, which is 25 days ago. FINRA publishes twice a month on the seventh business day after settlement, so this cycle was published around 2026-10-09 and the next is expected around 2026-10-26. No free source anywhere has anything fresher, including sites that display this number next to a live price.
Shares sold short
1,342⊙
EVIDENCE — filed/published fact
SourceFINRA consolidated short interest
FieldcurrentShortPositionQuantity
As of2026-09-30 settlement
HowFile shrt20260930.csv in FINRA's catalog (posted ~7 business days after settlement).
Average daily volume (FINRA, the days-to-cover denominator)
495
Exchange
Nasdaq (National Market)
Reg SHO threshold listPersistent settlement failures under Reg SHO Rule 203. A delivery-failure list, not a “naked shorting” list.
Not on the list (2026-10-23)
Short interest, % of shares outstandingPercent of shares outstanding. Not percent of float, and the two are not the same number.
no filed share count held
We do not hold a filing-derived share count for MEDX, so the percentage is not computed. A percentage of an unknown denominator is not a smaller version of the right answer, so nothing is shown in its place.
Short interest history
66 settlements on record, oldest 2023-08-31. Biweekly points, from FINRA’s own archive.
Settlement
Shares short
Change
% of shares out
Days to cover
Close, USD
Value short, USD
2026-09-30
1,342
-8.8%
n/a
2.71
35.28
47,348
2026-09-15
1,472
-34.8%
n/a
0.70
34.96
51,458
2026-08-31
2,258
+0.2%
n/a
1.16
36.42
82,230
2026-08-14
2,254
+19.4%
n/a
2.18
35.69
80,454
2026-07-31
1,887
+0.2%
n/a
0.68
34.92
65,894
2026-07-15
1,884
-1.6%
n/a
0.43
34.99
65,913
2026-06-30
1,915
-0.9%
n/a
1.20
36.71
70,307
2026-06-15
1,932
-14.3%
n/a
1.08
34.33
66,326
2026-05-29
2,254
-18.0%
n/a
1.70
34.30
77,320
2026-05-15
2,750
-19.6%
n/a
3.91
32.72
89,972
2026-04-30
3,422
+3.1%
n/a
3.26
32.69
111,878
2026-04-15
3,320
-23.3%
n/a
1.76
33.24
110,342
Show the other 54 settlements, back to 2023-08-31
Settlement
Shares short
Change
% of shares out
Days to cover
Close, USD
Value short, USD
2026-03-31
4,327
+20.3%
n/a
1.80
33.31
144,132
2026-03-13
3,597
+48.8%
n/a
0.85
33.20
119,424
2026-02-27
2,418
+255.6%
n/a
2.08
35.41
85,631
2026-02-13
680
+106.7%
n/a
0.47
34.72
23,612
2026-01-30
329
+75.0%
n/a
0.08
33.51
11,024
2026-01-15
188
-84.1%
n/a
0.24
33.13
6,229
2025-12-31
1,180
+7.9%
n/a
1.23
33.20
39,179
2025-12-15
1,094
-14.5%
n/a
1.62
33.82
37,001
2025-11-28
1,280
+1154.9%
n/a
1.41
33.93
43,436
2025-11-14
102
-51.2%
n/a
0.26
32.57
3,323
2025-10-31
209
-2.3%
n/a
0.26
31.23
6,528
2025-10-15
214
+20.9%
n/a
0.11
31.62
6,767
2025-09-30
177
+8750.0%
n/a
0.32
29.89
5,291
2025-09-15
2
-90.5%
n/a
0.00
29.07
58
2025-08-29
21
-96.6%
n/a
0.02
28.59
600
2025-08-15
610
-91.7%
n/a
0.44
28.55
17,418
2025-07-31
7,362
-8.7%
n/a
2.71
27.38
201,577
2025-07-15
8,067
+40235.0%
n/a
2.16
27.34
220,542
2025-06-30
20
-96.8%
n/a
0.01
26.65
533
2025-06-13
632
-28.7%
n/a
0.22
27.10
17,126
2025-05-30
887
+27.8%
n/a
0.46
26.08
23,129
2025-05-15
694
-53.8%
n/a
0.24
25.26
17,530
2025-04-30
1,503
-39.0%
n/a
2.22
27.15
40,813
2025-04-15
2,465
-52.1%
n/a
2.34
25.11
61,893
2025-03-31
5,147
-13.0%
n/a
6.92
27.67
142,417
2025-03-14
5,915
+509.2%
n/a
2.28
28.07
166,064
2025-02-28
971
+7.5%
n/a
0.60
28.70
27,870
2025-02-14
903
+30.7%
n/a
0.62
27.76
25,067
2025-01-31
691
-27.1%
n/a
0.77
27.33
18,885
2025-01-15
948
-63.5%
n/a
1.06
25.90
24,550
2024-12-31
2,596
-77.0%
n/a
1.15
26.13
67,833
2024-12-13
11,299
+137.9%
n/a
4.46
27.36
309,084
2024-11-29
4,750
n/a
n/a
3.53
28.45
135,138
2024-10-31
1
-98.1%
n/a
0.00
29.24
29
2024-10-15
52
+40.5%
n/a
0.11
30.85
1,604
2024-09-30
37
-21.3%
n/a
0.14
30.56
1,131
2024-09-13
47
-39.7%
n/a
0.28
31.31
1,471
2024-08-30
78
n/a
n/a
0.25
31.92
2,490
2024-06-28
127
-26.6%
n/a
0.20
n/a
n/a
2024-06-14
173
+137.0%
n/a
0.30
n/a
n/a
2024-05-31
73
+32.7%
n/a
0.15
n/a
n/a
2024-05-15
55
-81.5%
n/a
0.19
n/a
n/a
2024-04-30
297
-36.3%
n/a
0.84
n/a
n/a
2024-04-15
466
+30.2%
n/a
0.30
n/a
n/a
2024-03-28
358
+20.1%
n/a
0.44
n/a
n/a
2024-03-15
298
+29700.0%
n/a
0.50
n/a
n/a
2024-02-29
1
n/a
n/a
0.00
n/a
n/a
2023-11-30
97
+0.0%
n/a
0.40
n/a
n/a
2023-11-15
97
-4.9%
n/a
0.13
n/a
n/a
2023-10-31
102
-30.6%
n/a
0.18
n/a
n/a
2023-10-13
147
+0.0%
n/a
0.53
n/a
n/a
2023-09-29
147
+0.0%
n/a
0.17
n/a
n/a
2023-09-15
147
-8.1%
n/a
0.33
n/a
n/a
2023-08-31
160
n/a
n/a
0.21
n/a
n/a
Change is against the settlement before it, and is left out where one is missing from the archive. Percent of shares outstanding divides by the filed share count dated nearest each settlement, within 200 days, so it moves when the share count does; it is not percent of float. Close and value short (shares short times that day’s close, both as traded) come from our stored daily bars, which begin 2024-07-01; earlier settlements show none rather than a figure from another source. Nothing here is split-adjusted, so a split appears as the step it was.
Different measurement // daily, and not a position
Daily short volume
This is not the number above. Short interest is the position still held short, reported twice a month. Short volume is the share of a single day’s trading that was marked as a sell-short order, published daily. Most of it is market makers hedging and closing within the same session, so a stock printing a high figure here is not that percentage sold short.
Latest session (2026-10-23)
53.0%
Average, last 10 sessions
41.4%
2026-10-2353.0%
2026-10-223.2%
2026-10-2187.6%
2026-10-2047.6%
2026-10-1976.2%
2026-10-1664.7%
2026-10-1550.5%
2026-10-146.9%
2026-10-131.4%
2026-10-1223.1%
FINRA Reg SHO consolidated daily file. Sessions with no row for MEDX are omitted rather than shown as zero.
Price context // daily bars, not short data
Where the price sits
Session of 2026-10-23, from 275 sessions of daily bars. These are price figures, not short figures, and they update daily rather than twice a month.
Close
$36.53
Volume, latest session
49
Volume vs averageAgainst its own 50-session average of 1,143, same series on both sides
0.04x
% from 52-week high ($37.90)
-3.6%
% from 52-week low ($30.79)
+18.6%
52-week performance
+15.8%
% from 50-day average ($35.91)
+1.7%
% from 200-day average ($34.55)
+5.7%
RSI, 14-dayWilder’s construction, so it matches what charting platforms print
57.8
Why there is no “% of float” here
Percent of float is the number the paid trackers lead with, and it is the one number in this category that cannot be published honestly for free. There is no free float share count: the SEC’s XBRL concept for float does not exist, and the closest one, public float, is measured in dollars and is filed once a year with the annual report. For Apple it currently reads as of March 2025, sixteen months ago.
So a free site showing percent of float is doing one of two things: quietly substituting shares outstanding, which for a heavily insider-held small company is a wildly different number, or republishing a commercial estimate it licensed. We publish the percentage that filed data supports, label it as percent of shares outstanding, and where insider Form 4 filings allow it we publish percent of float as an explicit floor: subtracting only filed direct insider holdings from shares outstanding gives a ceiling on float, so the division gives a number the true percentage can only exceed. What we will not do is print a bare “% of float” built on someone else’s estimate. Where a figure is measured, this site says what it was measured against. Read the methodology.
What days to cover means
Open short interest divided by average daily trading volume: roughly how many full sessions of normal volume it would take for every short position to be bought back. FINRA computes it per security at each settlement and we pass their figure through. This matters more than it sounds, because sites that compute their own pick their own volume window and rarely say which, so the same stock shows materially different values depending on where you look.
High short interest and high days to cover describe fuel, not ignition. They say a crowded position exists; they say nothing about whether it unwinds, and heavily shorted stocks frequently keep falling. Educational information, not investment advice.
FINRA is the owner and source of this short interest and short sale volume data. Free on every plan; not for redistribution.
MEDX short interest FAQ
How old is this MEDX short interest figure?
It is the 2026-09-30 settlement, which is 25 days ago. FINRA collects short interest twice a month and publishes on the seventh business day after each settlement date, so this was published around 2026-10-09 and the next cycle is expected around 2026-10-26. There is no fresher short interest available anywhere for free, including from tools that display it next to a live price.
Why does this show percent of shares outstanding rather than percent of float?
Because float share counts are not published by any free source. The SEC XBRL concept for float does not exist, and the nearest one is measured in dollars and comes only from the annual report. Every free site showing a float percentage is republishing a commercial estimate. We publish the percentage we can compute from filed data and label it for what it is, rather than passing shares outstanding off as float.
Where does days to cover come from?
Shares short divided by average daily volume, using FINRA’s own two published figures. We do not use FINRA’s own days-to-cover field, because it is floored at 1.00: across the current file, 7,869 securities, over a third of the market, are published at exactly 1.00 and nearly all of them are genuinely below it. One stock with a true ratio of 0.03 is published as 1.00. Sites that instead invent their own average-volume window produce a different problem, which is why the operands here are both FINRA’s.
Is high short interest a buy signal?
No. High short interest is frequently the market pricing real problems, and many heavily shorted stocks keep falling. This page measures positioning. It makes no recommendation.