Stock Market Breadth Signals Potential Opportunity

Veteran investor warns against panic selling during market shifts

Mar. 30, 2026 at 1:05pm

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A seasoned investment manager with over 25 years of experience is cautioning investors against making hasty decisions to sell during periods of declining stock market breadth. The author, a partner at RIA Advisors in Houston, Texas, argues that the single most damaging move investors can make is to sell when market breadth narrows, as this often represents an opportunity rather than a reason to panic.

Why it matters

Market breadth, which measures the participation of individual stocks in an overall market move, is considered an important indicator of the health and sustainability of a market rally. When breadth starts to deteriorate, it can signal an impending downturn, leading many investors to react by selling. However, this veteran investor contends that such periods often present buying opportunities for those who can maintain discipline.

The details

The author, who has experience ranging from private banking and investment management to private and venture capital, believes that most investors make the mistake of selling when market breadth starts to narrow. He argues that this knee-jerk reaction can be detrimental, as declining breadth may actually signal a shift in the market that savvy investors can capitalize on.

  • The article was published on March 30, 2026.

The players

Lance Roberts

A partner at RIA Advisors in Houston, Texas, with over 25 years of experience in the investing world, including roles in private banking, investment management, and private and venture capital.

RIA Advisors

A Houston-based investment advisory firm where Lance Roberts is a partner.

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What they’re saying

“The single most damaging decision most investors make during periods of falling stock market breadth is selling.”

— Lance Roberts, Partner, RIA Advisors

The takeaway

This article serves as a reminder for investors to maintain discipline and avoid panic selling during periods of market volatility and narrowing breadth. The author's extensive experience suggests that such shifts can often present opportunities for those willing to stay the course and capitalize on the market's long-term potential.