The S&P 500 (^GSPC) is considered a broad market index. But is that really accurate when so much of its concentration is focused on only a handful of stocks?

In this episode of Stocks In Translation, Yahoo Finance markets and data editor Jared Blikre examines “market concentration,” when only a few stocks in an index or investor portfolio account for most of the gains.

Joined by Yahoo Finance's Sydnee Fried and The Lead-Lag Reports publisher Michael Gayed, the group dives into the debate over the narrow bull market. “It’s debatable as to whether the S&P 500 is really a diversified index anymore,” adds Gayed. “When you’ve got a select number of stocks that are diving the entire momentum play across the board.” Gayed provides a path to diversification for passive, index-only investors. He also explains how when the markets react to economic data, it's trading algorithms sending stocks higher and lower, not humans.

Bilkre and crew also discuss zombie companies, the Pareto Principle, and Japan’s influence on last week’s volatility. “The carry trade has been going on for years. You don’t resolve that in 48 hours,” adds Gayed.

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Find this episode's transcripts and more episodes of Stocks in Translation at https://www.cerveza-artesanal.com/videos/series/stocks-in-translation

This post was written by John Tejada.