The U.S. stock market has become so concentrated that even broad index funds are no longer well diversified, our columnist ...

The invention of market cap-weighted indices has been beneficial for the average investor by providing a simple and efficient way to gain exposure to equity markets. We examine how elevated ...

Over the last decade, the 10 largest stocks in the Russell 1000 Growth Index rose to dizzying heights to dominate the market. Market concentration rewarded passive investors who held market weights in ...

David Kostin is seeing similarities to the dot-com bubble as "superstar" firms boost the market. Record-high market concentration will lead to a decade of weak returns, the strategist said. Kostin ...

On this episode of The Long View, Cullen Roche, founder and chief investment officer of Discipline Funds and head of Orcam Group, discusses sequence-of-returns risk during market concentration, why ...

Is your portfolio making a big bet on the Magnificent Seven? Why it matters: Mega-cap names like Nvidia, Alphabet, and Apple belong to the exclusive club that has largely driven US returns higher in ...

Since the low point of 2008, the value of global bonds and equities has grown to $255bn, more than 2.5x their starting value. In share markets, those 16 years have also seen an expansion of the ...

Goldman Sachs has issued a stark warning for U.S. equity investors, predicting significantly lower returns for the S&P 500 over the next decade due to historically high levels of market concentration.

'Mad Money' host Jim Cramer talks his take on the current market concentration and what it means for investors. Got a confidential news tip? We want to hear from you. Sign up for free newsletters and ...

(Bloomberg/Felice Maranz) — The unprecedented level of concentration in a handful of tech stocks provokes strong feelings on Wall Street. Some investors fear the top-heaviness means the bull run is on ...