Reinsurance Group of America (RGA) had the lowest return in 1997 by a large-cap US stock, returning -94.7%.

ASSET	YEAR	% RETURN
Reinsurance Group of America (RGA)	1997	-94.71%
Telkom Indonesia (Persero) Tbk PT ADR Rep 100 B (TLK)	1997	-67.86%
Leonardo DRS, Inc Common Stock (DRS)	1997	-65.08%
Royal Gold (RGLD)	1997	-64.49%
Agnico Eagle Mines (AEM)	1997	-60.98%
IDEXX Laboratories (IDXX)	1997	-56.36%
Kinross Gold (KGC)	1997	-51.75%
Korea Electric Power Corp ADR (KEP)	1997	-49.58%
Cheniere Energy (LNG)	1997	-48.5%
Regeneron Pharmaceuticals (REGN)	1997	-46.9%
Freeport-McMoran Copper & Gold (FCX)	1997	-45.8%
Western Digital (WDC)	1997	-43.61%
Laboratory Corporation of America (LH)	1997	-39.13%
AngloGold Ashanti (AU)	1997	-37.88%
Apple (AAPL)	1997	-37.85%
MasTec (MTZ)	1997	-34.64%
Nike (NKE)	1997	-34.11%
Gold Fields Ltd ADR (GFI)	1997	-34.08%
Newmont Goldcorp (NEM)	1997	-33.02%
BHP (BHP)	1997	-31.88%
Advanced Micro Devices (AMD)	1997	-31.4%
Rogers Communications (RCI)	1997	-30.36%
Suzano Papel e Celulose SA ADR (SUZ)	1997	-29.06%
Penske Automotive (PAG)	1997	-28.54%
ArcelorMittal SA ADR (MT)	1997	-27.62%

Large-cap stocks are treated as having a market cap of $10B+.