Applied Digital (APLD) had the lowest return in April 2020 by a mid-cap US stock, returning -58.7%.

ASSET	MONTH	% RETURN
Applied Digital (APLD)	April 2020	-58.72%
Inventrust Properties (IVT)	April 2020	-51.11%
Quantum Computing (QUBT)	April 2020	-27.01%
Weatherford International (WFRD)	April 2020	-24.37%
Telecom Argentina SA ADR (TEO)	April 2020	-22.29%
Sphere Entertainment (SPHR)	April 2020	-17.3%
Power Solutions International, Inc Common Stock (PSIX)	April 2020	-16.3%
Dillard's (DDS)	April 2020	-16.11%
Tidewater (TDW)	April 2020	-15.29%
RLI (RLI)	April 2020	-13.14%
Pearson PLC ADR (PSO)	April 2020	-12.54%
Golub Capital BDC (GBDC)	April 2020	-11.73%
WD-40 (WDFC)	April 2020	-11.72%
WM Technology (MAPSW)	April 2020	-9.77%
Golar LNG (GLNG)	April 2020	-8.52%
Beam Therapeutics (BEAM)	April 2020	-7.86%
California Water Service (CWT)	April 2020	-7.52%
Laureate Education (LAUR)	April 2020	-7.16%
TFS Financial (TFSL)	April 2020	-7.14%
Balchem (BCPC)	April 2020	-6.81%
Kemper (KMPR)	April 2020	-6.01%
Ormat Technologies (ORA)	April 2020	-5.9%
Grupo Simec SAB de CV ADR (SIM)	April 2020	-5.3%
Pampa Energia SA ADR (PAM)	April 2020	-4.36%
89bio (ETNB)	April 2020	-4.04%

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