Jabil Circuit (JBL) had the highest return in March 1997 by a large-cap US stock, returning 33.5%.

ASSET	MONTH	% RETURN
Jabil Circuit (JBL)	March 1997	33.51%
POSCO (PKX)	March 1997	21.8%
Corning (GLW)	March 1997	18.33%
Advanced Micro Devices (AMD)	March 1997	16.9%
NVR (NVR)	March 1997	16.35%
Valero Energy (VLO)	March 1997	15.02%
Williams-Sonoma (WSM)	March 1997	15%
Check Point Software Technologies (CHKP)	March 1997	14.69%
Applied Industrial Technologies (AIT)	March 1997	13.36%
ASML Holding NV ADR (ASML)	March 1997	12.57%
First Citizens BancShares (FCNCA)	March 1997	11.4%
Humana (HUM)	March 1997	11.39%
Best Buy (BBY)	March 1997	10.8%
Regal Beloit (RRX)	March 1997	10.69%
Apple (AAPL)	March 1997	10.59%
Coca-Cola Femsa SAB de CV ADR (KOF)	March 1997	10.35%
Allegheny Technologies (ATI)	March 1997	10.29%
Contura Energy (CTRA)	March 1997	10.23%
Dycom Industries (DY)	March 1997	10.23%
McDonald’s (MCD)	March 1997	10.2%
Hershey (HSY)	March 1997	10.19%
O’Reilly Automotive (ORLY)	March 1997	10.14%
Old Dominion Freight Line (ODFL)	March 1997	9.99%
SAP SE ADR (SAP)	March 1997	9.71%
Adobe Systems (ADBE)	March 1997	9.69%

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