Forget Big Tech monopolies — the better stock-market investment is in oligopolies By: MarketWatch November 21, 2019 at 05:44 AM EST Look at health care, railroads, utilities and more within the S&P 500. Read More >> Related Stocks: AT&T Inc Alphabet-A Alphabet-C American Express Berkshire Hathaway Berkshire Hathaway CSX Corp Canadian National Railway Company China Mobile Hong Kong Ltd Cisco Systems Duke Energy Exelon Corp Facebook Hca Holdings Inc MasterCard NextEra Energy Norfolk Southern Sentinelone Inc Cl A T-Mobile US Union Pacific Univl Health Services Verizon Communications Visa