The top 10 stocks in the S&P 500 account for an outsized share of the index’s market cap and of its stellar 2024 performance. Goldman Sachs Research’s David Kostin, chief US equity strategist, and Owen Lamont, senior vice president and portfolio manager at Acadian Asset Management LLC, discuss whether investor concerns over today’s high US equity market concentration are warranted. This episode explores the latest Top of Mind report, Market Concentration: How Big a Worry?