But here’s the thing, efficiency is great until it’s not.

Futures for the main stock indexes were mostly pointing down after the so-called Magnificent Seven stocks slid for a second ...

Dow, S&P 500, and Nasdaq futures are rising in premarket trading as the stock market looks ahead to the Federal Reserve's Jackson Hole Symposium.

A widely owned member of the "Magnificent Seven" is activist investor Bill Ackman's prized new holding. The ancillary ...

The S&P 500 is at its most expensive by this measure. These stocks have bucked the trend. The U.S. benchmark just hit its highest price/trailing sales ratio ever The broad U.S. stock market is trading ...

The S&P 500 Index ($SPX ) (SPY ) today is down by -1.01%, the Dow Jones Industrials Index ($DOWI ) (DIA ) is down by -0.27%, ...

SPY's market cap weighting hides a heavy bet on the Magnificent Seven, making it less diversified than many investors realize ...

The weighting of Mag 7 stocks in the S&P 500 just soared past 34%. Find out why that matters from a historical perspective, ...