thetaOwl

Market Movers — Volume

Compared to prior trading day

Total Symbols: 20
Avg Change: +724.7%
Most Active Sector: Healthcare
As of: Aug 18, 2026

Biggest Increase

#SymbolPriceVol ChangeAvg VolumeSector
1
NMRANeumora Therapeutics, Inc.
$1.64+3860.9%
12754
Healthcare
2
BOCBoston Omaha Corporation
$13.90+1956.3%
1974
Industrials
3
UGIUGI Corporation
$38.39+1638.4%
3303
Utilities
4
REIRing Energy, Inc.
$1.44+1506.4%
10763
Energy
5
ALECAlector, Inc.
$2.21+1168.8%
1218
Healthcare
6
AVDAmerican Vanguard Corporation
$2.17+1168.6%
444
Basic Materials
7
CMPXCompass Therapeutics, Inc.
$2.39+1086.4%
24713
Healthcare
8
CTMXCytomX Therapeutics, Inc.
$3.39+1078.8%
9324
Healthcare
9
ASXASE Technology Holding Co., Ltd
$36.41+984.5%
52969
Technology
10
AMLXAmylyx Pharmaceuticals, Inc.
$35.11+950.3%
19010
Healthcare

Biggest Decrease

#SymbolPriceVol ChangeAvg VolumeSector
1
LYGLloyds Banking Group Plc
$6.06-98.8%
261
Financial Services
2
FRFirst Industrial Realty Trust,
$62.37-97.3%
57
Real Estate
3
ERIIEnergy Recovery, Inc.
$7.88-96.0%
209
Industrials
4
ARAYAccuray Incorporated
$0.31-94.1%
310
Healthcare
5
ACICAmerican Coastal Insurance Corp
$9.51-90.4%
595
Financial Services
6
TNETTriNet Group, Inc.
$69.84-89.1%
313
Industrials
7
SPHRSphere Entertainment Co.
$164.22-85.8%
1606
Communication Services
8
NANano Labs Ltd
$1.83-84.5%
108
Technology
9
HBANHuntington Bancshares Incorpora
$17.66-84.4%
5216
Financial Services
10
TTAMTitan America SA
$15.14-84.1%
173
Basic Materials
How to Use Volume Movers

Use volume movers to spot where options behavior changed the most on the close, then confirm whether the shift came with tradable liquidity and a clear catalyst.

Big changes in one options metric can be noisy or one-off, so always check the broader chain before acting.