Oracle (ORCL) had the lowest return in August 1996 by a mega-cap US stock, returning -9.9%.

ASSET	MONTH	% RETURN
Oracle (ORCL)	August 1996	-9.9%
Toyota Motor Corporation ADR (TM)	August 1996	-3.02%
Costco Wholesale (COST)	August 1996	-2.45%
Morgan Stanley (MS)	August 1996	-1.29%
ASML Holding NV ADR (ASML)	August 1996	-0.97%
Bank of America (BAC)	August 1996	-0.87%
Exxon Mobil (XOM)	August 1996	-0.78%
American Express (AXP)	August 1996	-0.28%
McDonald’s (MCD)	August 1996	0.43%
Procter & Gamble (PG)	August 1996	0.57%
Cisco Systems (CSCO)	August 1996	0.96%
Shell PLC ADR (SHEL)	August 1996	1.01%
Raytheon Technologies (RTX)	August 1996	1.07%
GE Aerospace (GE)	August 1996	1.22%
Berkshire Hathaway (BRK.B)	August 1996	1.56%
Applied Materials (AMAT)	August 1996	1.57%
Berkshire Hathaway (BRK.A)	August 1996	1.62%
Walt Disney (DIS)	August 1996	1.79%
Eli Lilly and (LLY)	August 1996	1.93%
Merck (MRK)	August 1996	2.24%
Royal Bank of Canada (RY)	August 1996	2.55%
Abbott Laboratories (ABT)	August 1996	2.56%
Chevron (CVX)	August 1996	2.9%
Citigroup (C)	August 1996	3.27%
Johnson & Johnson (JNJ)	August 1996	3.51%

Mega-cap stocks are treated as having a market cap of $200B+.