NioCorp Developments Ltd Common Stock (NB) had the best month between 2019 and 2023 by a small-cap US stock in March 2023, returning 706,566.7%.

ASSET	MONTH	% RETURN
NioCorp Developments Ltd Common Stock (NB)	March 2023	706,566.67%
Integra Resources (ITRG)	July 2020	465,455.56%
SS Innovations International Inc Common Stock (SSII)	January 2022	3,150%
AMTD Digital (HKD)	July 2022	2,978.85%
Osisko Development (ODV)	December 2019	2,660%
Fubotv (FUBO)	February 2019	2,367.25%
Diversified Energy (DEC)	December 2023	1,675.19%
Osisko Development (ODV)	December 2020	1,566.67%
NRx Pharmaceuticals (NRXPW)	December 2020	1,242.86%
Eastman Kodak (KODK)	July 2020	875.45%
NioCorp Developments Ltd Common Stock (NB)	June 2019	760%
NioCorp Developments Ltd Common Stock (NB)	July 2019	760%
NioCorp Developments Ltd Common Stock (NB)	April 2019	740%
Newegg Commerce (NEGG)	January 2020	731.43%
Lightwave Logic (LWLG)	June 2021	698.34%
Hycroft Mining (HYMC)	March 2022	641.94%
NioCorp Developments Ltd Common Stock (NB)	February 2020	633.33%
AMC Entertainment (AMC)	January 2021	502.73%
Ocugen (OCGN)	February 2021	498.69%
Capricor Therapeutics (CAPR)	April 2020	488.24%
Cogent Biosciences (COGT)	July 2020	484.91%
Advent Technologies (ADNWW)	November 2020	467.06%
Pharvaris (PHVS)	December 2022	425.7%
Ocugen (OCGN)	December 2020	422.86%
American Battery Technology Company Common Stock (ABAT)	December 2020	409.09%

Small-cap stocks are treated as having a market cap between $300M and $2B.