ANSYS (ANSS) had the highest return in August 1997 by a US stock in the S&P 500 (GSPC), returning 37.5%.

ASSET	MONTH	% RETURN
ANSYS (ANSS)	August 1997	37.5%
Best Buy (BBY)	August 1997	31.24%
DR Horton (DHI)	August 1997	29.36%
Western Digital (WDC)	August 1997	24.6%
Apple (AAPL)	August 1997	23.34%
Jabil Circuit (JBL)	August 1997	21.23%
Viatris (VTRS)	August 1997	20.57%
NVR (NVR)	August 1997	20.42%
Teradyne (TER)	August 1997	19.12%
IDEXX Laboratories (IDXX)	August 1997	18.09%
Thermo Fisher Scientific (TMO)	August 1997	17.95%
Cooper Companies, Inc Common Stock (COO)	August 1997	17.86%
EOG Resources (EOG)	August 1997	17.68%
Molson Coors Brewing (TAP)	August 1997	17.53%
Skyworks Solutions (SWKS)	August 1997	17%
KLA-Tencor (KLAC)	August 1997	16.91%
MGM Resorts International (MGM)	August 1997	16.46%
Gilead Sciences (GILD)	August 1997	15.62%
Tyler Technologies (TYL)	August 1997	15.38%
Valero Energy (VLO)	August 1997	14.87%
Jacobs Solutions (J)	August 1997	14.25%
Texas Pacific Land Trust (TPL)	August 1997	14.15%
Hologic (HOLX)	August 1997	14.12%
Huntington Bancshares (HBAN)	August 1997	13.59%
Atmos Energy (ATO)	August 1997	13.48%