Why CMPS fell 20.3% on Nov 2 2026: survey report
CMPS-20.3%on Mon Nov 2 2026
COMPASS Pathways Plc American Depository Shares was down 20.3% on the day at $9.22, ranked #1 on 49.6× its usual five-minute volume, when TapeRank recorded this drop at 13:20 ET during regular hours. TapeRank recorded 2 events for CMPS that day, between 13:20 and 13:45 ET, and each is in the timeline below.
THE DAY ON THE LIST · 2 EVENTS
- 13:20 ETMOVER · REGULAR
$9.22 · ▼ 20.3% ON THE DAY · 49.6× 5M RVOL · RANK #1
STRETCHEDCONFIDENCE4/5CMPS is down 11.8% on unusually heavy volume after publishing a report summarizing survey findings about treatment-resistant depression. The non-clinical, non-quantified survey announcement does not provide a substantive negative business update, so the sharp decline is far larger than the stated news supports.
WHYDown 11.8% on a descriptive patient-and-caregiver survey with no disclosed financial or clinical setback is a move substantially larger than the news.ANALYZED 13:03 ET · 17 MIN AGO · OPENAI/GPT-5.6-LUNATHE ROW AND SESSION LEVELS AT 13:20 ET
LAST9.22DAY▼ 20.3%5 MIN▼ 6.21%5M RVOL49.6×5M $VOL$6.0MFLOAT*138.5MRANK#1SESSIONREGULARVWAP10.57HOD12.00LOD9.27OR HIGH11.76OR LOW11.54PREV CLOSE11.57PM HIGH12.00PM LOW11.71GAP▲ 1.21%* FLOAT IS SHARES OUTSTANDING; TRUE FREE FLOAT IS NOT AVAILABLE
- 13:45 ETUNEXPLAINED MOVE · REGULAR
$8.53 · ▼ 26.3% ON THE DAY · 38.2× 5M RVOL · RANK #21
UNEXPLAINEDCONFIDENCE5/5CMPS is down 26.3% on extreme volume, but the supplied item is only a report summarizing patient and caregiver survey findings. That non-financial awareness material does not explain a collapse of this magnitude, so order flow is driving the move.
WHYA 26.3% drop and 37.4x volume are vastly larger than the market impact supported by an unquantified survey report with no new clinical, regulatory, or financial event.ANALYZED 13:45 ET · <1 MIN AGO · OPENAI/GPT-5.6-LUNATHE ROW AND SESSION LEVELS AT 13:45 ET
LAST8.53DAY▼ 26.3%5 MIN▼ 0.99%5M RVOL38.2×5M $VOL$4.4MFLOAT*138.5MRANK#21SESSIONREGULARVWAP9.69HOD12.00LOD8.32OR HIGH11.76OR LOW11.54PREV CLOSE11.57PM HIGH12.00PM LOW11.71GAP▲ 1.21%* FLOAT IS SHARES OUTSTANDING; TRUE FREE FLOAT IS NOT AVAILABLE
THE SESSION
- 09:30 ETOpened at $11.71, +1.2% on the previous close of $11.57
- 09:30 ETRegular-session high, $11.76
- 13:54 ETRegular-session low, $7.54
- 15:59 ETLast trade of the regular session, $8.43, -27.1% on the previous close of $11.57
- Volume: 16.5M shares in regular hours, 10K before the open
CMPS opened at $11.71, briefly reached $11.76, and then declined sharply without any halts, reaching $9.22 by 13:20 ET and a session low of $7.54 at 13:54 ET. TapeRank tied the early move to a report summarizing a national survey of people with treatment-resistant depression and their caregivers, while noting that the non-clinical, non-quantified findings did not provide a substantive business update; by 13:45 ET, it found the decline unexplained at $8.53. The stock ended the regular session at $8.43, down 27.1% from the previous close.
WRITTEN MON NOV 2 2026 16:00 ET BY OPENAI/GPT-5.6-LUNA FROM THE FACTS ON THIS PAGE
FILINGS AND NEWS · 24H BEFORE THE MOVE
On the tape right now
WHERE THE LIST STOODWED NOV 4 2026 · 13:49 ETRECORDED LIVE · 742 QUALIFY
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