Baytex Energy (BTE) had the highest return in April 2018 by a mid-cap US stock or mid-cap US stock, returning 63.1%.

ASSET	MONTH	% RETURN
Baytex Energy (BTE)	April 2018	63.14%
Applied Digital (APLD)	April 2018	39.02%
Nextdecade (NEXT)	April 2018	37.35%
Chord Energy (CHRD)	April 2018	37.19%
Scorpio Tankers (STNG)	April 2018	35.71%
SM Energy (SM)	April 2018	34.31%
Aya Gold & Silver Inc Common Shares (AYA)	April 2018	33.72%
Vericel Corp Ord (VCEL)	April 2018	33.5%
Enova International (ENVA)	April 2018	33.49%
Weatherford International (WFRD)	April 2018	30.52%
OFG Bancorp (OFG)	April 2018	29.19%
Applied Opt (AAOI)	April 2018	28.51%
CleanSpark (CLSK)	April 2018	27.07%
Novocure (NVCR)	April 2018	26.68%
Transocean (RIG)	April 2018	25.97%
Xenon Pharmaceuticals (XENE)	April 2018	24.49%
Uniqure (QURE)	April 2018	24.31%
Patterson-UTI Energy (PTEN)	April 2018	24.25%
Archrock (AROC)	April 2018	24.14%
Magnite (MGNI)	April 2018	23.86%
Caesars Entertainment (CZR)	April 2018	22.91%
Ternium SA ADR (TX)	April 2018	22.1%
Endeavour Silver (EXK)	April 2018	21.95%
Imax (IMAX)	April 2018	21.78%
FTI Consulting (FCN)	April 2018	20.99%

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