Plug Power (PLUG) had the lowest return on September 23 by a mid-cap US stock, returning -13.7%.

ASSET	DATE	% RETURN
Plug Power (PLUG)	9/23/2025	-13.65%
Bitdeer Technologies Group Class A Ordinary Shares (BTDR)	9/23/2025	-11.91%
Opendoor Technologies (OPEN)	9/23/2025	-10.93%
Generac (GNRC)	9/23/2025	-10.72%
Enphase Energy (ENPH)	9/23/2025	-9.5%
Applied Opt (AAOI)	9/23/2025	-8%
Sunrun (RUN)	9/23/2025	-7.43%
Hut 8 Corp Common Stock (HUT)	9/23/2025	-7.18%
Hycroft Mining (HYMC)	9/23/2025	-6.92%
Lumen Technologies (LUMN)	9/23/2025	-6.75%
Polibeli Group Ltd Class A Ordinary Shares (PLBL)	9/23/2025	-6.7%
VNET Group Inc DRC (VNET)	9/23/2025	-6.5%
Aris Mining (ARMN)	9/23/2025	-6.45%
Nuscale Power (SMR)	9/23/2025	-6.43%
GeneDx (WGS)	9/23/2025	-6.3%
Sezzle (SEZL)	9/23/2025	-6.2%
BBVA Banco Frances SA ADR (BBAR)	9/23/2025	-5.88%
Hudbay Minerals (HBM)	9/23/2025	-5.82%
Riot Blockchain (RIOT)	9/23/2025	-5.74%
CleanSpark (CLSK)	9/23/2025	-5.63%
Viking Therapeutics (VKTX)	9/23/2025	-5.6%
Ringcentral (RNG)	9/23/2025	-5.45%
Grupo Financiero Galicia SA ADR (GGAL)	9/23/2025	-5.23%
Immunovant (IMVT)	9/23/2025	-5.16%
TransMedics (TMDX)	9/23/2025	-5.1%

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