Upstart Holdings (UPST) had the lowest return in August 2023 by a mid-cap US stock, returning -52.1%.

ASSET	MONTH	% RETURN
Upstart Holdings (UPST)	August 2023	-52.1%
D-Wave Quantum (QBTS)	August 2023	-49.12%
Magnite (MGNI)	August 2023	-45%
Quantumscape (QS)	August 2023	-44.74%
DigitalOcean (DOCN)	August 2023	-44.55%
Lemonade (LMND)	August 2023	-40.15%
Icahn Enterprises (IEP)	August 2023	-39.03%
Riot Blockchain (RIOT)	August 2023	-37.4%
Rigetti Computing (RGTI)	August 2023	-37.28%
Peloton Interactive (PTON)	August 2023	-33.05%
Doximity (DOCS)	August 2023	-32.43%
Spirit Aerosystems (SPR)	August 2023	-32.12%
Novocure (NVCR)	August 2023	-31.93%
Nio Inc Class A ADR (NIO)	August 2023	-30.89%
Lufax (LU)	August 2023	-30.06%
TransMedics (TMDX)	August 2023	-29.3%
Nordstrom (JWN)	August 2023	-28.35%
Hesai Group American Depositary Share, each ADS represents one Class B ordinary share (HSAI)	August 2023	-27.88%
Etsy (ETSY)	August 2023	-26.84%
PureCycle Technologies (PCTTW)	August 2023	-26.82%
Foot Locker (FL)	August 2023	-26.49%
Mister Car Wash, Inc Common Stock (MCW)	August 2023	-26.27%
Immunitybio (IBRX)	August 2023	-26.15%
TMC the metals (TMC)	August 2023	-26.04%
Polestar Automotive Holding UK PLC Class A ADS (PSNY)	August 2023	-26%

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