Bitdeer Technologies Group Class A Ordinary Shares (BTDR) had the lowest return in October 2023 by a mid-cap US stock, returning -62%.

ASSET	MONTH	% RETURN
Bitdeer Technologies Group Class A Ordinary Shares (BTDR)	October 2023	-61.99%
Arcutis Biotherapeutics (ARQT)	October 2023	-57.22%
CommScope (VISN)	October 2023	-56.34%
VinFast Auto Ltd Ordinary Shares (VFS)	October 2023	-51.13%
Aehr Test Systems (AEHR)	October 2023	-48.73%
Penguin Solutions (PENG)	October 2023	-43.62%
Praxis Precision Medicines (PRAX)	October 2023	-42.13%
SolarEdge Technologies (SEDG)	October 2023	-39.29%
Amprius Technologies (AMPX)	October 2023	-38.09%
Ondas (ONDS)	October 2023	-37.97%
Babcock & Wilcox Enterprises (BW)	October 2023	-36.78%
Enphase Energy (ENPH)	October 2023	-33.24%
Quantum Computing (QUBT)	October 2023	-32.69%
Sezzle (SEZL)	October 2023	-31.92%
MaxLinear (MXL)	October 2023	-31.69%
Calumet Specialty Products Partners (CLMT)	October 2023	-31.28%
Nuscale Power (SMR)	October 2023	-31.02%
Compass (COMP)	October 2023	-31.01%
Chart Industries (GTLS)	October 2023	-30.95%
TransMedics (TMDX)	October 2023	-30.87%
Enerflex (EFXT)	October 2023	-30.42%
Grupo Aeroportuario del Centro Norte SAB de CV (OMAB)	October 2023	-29.98%
Wayfair (W)	October 2023	-29.48%
Perimeter Solutions (PRM)	October 2023	-28.89%
Telesat (TSAT)	October 2023	-27.92%

Mid-cap stocks are treated as having a market cap between $2B and $10B.