RS Logo

Churn Beneath the Surface – Rising Tail Risks – February 27, 2026

Good morning,

Another week of churn beneath the market’s surface, even though the S&P 500 Index goes nowhere, has been the story of the month. While the S&P 500 looks to finish little changed, leadership continued to rotate aggressively. Severe price corrections in pockets of AI-driven technology and communications were offset by strength in the broader market — the “analog economy,” if you will — made up of businesses less dependent on AI infrastructure and hype cycles.

Despite the mixed tape and persistent crosscurrents, most primary trend indicators remain constructive, suggesting the path of least resistance still leans bullish for now.

That said, a few research observations — viewed collectively — are worth noting as we move closer to Q2 and the second half of the year.

First, from Ned Davis Research: an unusual combination of very high pessimism readings alongside new index price and breadth highs recently triggered. These two conditions rarely coexist. Extreme pessimism typically marks a bottom, not new highs. On the few historical occasions when this pairing has occurred, markets have tended to rally in the weeks immediately following the signal. However, in most instances, a bear market began roughly six months later. Rare does not mean irrelevant.

Second, earlier this week Torsten Slok, Chief Economist at Apollo Global Management, remarked:

“The U.S. economy continues to perform well. But the tail risks have increased from 10% to 30%.”

In statistical terms, the “tail” represents low-probability, high-impact outcomes — recession, financial accidents, credit events, geopolitical shocks, policy missteps, or liquidity freezes. A move from 10% to 30% suggests the probability of a significant negative disruption has roughly tripled. Not a forecast — but a meaningful shift in risk assessment.

Finally, the High-Low Logic Index registered its third-highest reading on record. Without diving into its construction, a high reading generally signals internal market conflict: many stocks simultaneously making new highs and new lows. In plain English, the market is struggling to find direction — somewhat “out of gear.” If this condition persists for several weeks, it can be consistent with a topping process.

Individually, each of these signals is manageable. In chorus, they warrant attention.

Most equity models remain bullish or neutral, and the primary trend is intact. Yet beneath the surface, the message is becoming more nuanced: momentum remains positive, but risk is rising. That does not mean a storm is imminent — but it does suggest we keep an umbrella within reach.

Be well,
Mike

Disclosure and Source

Investment advisory services offered through Robertson Stephens Wealth Management, LLC (“Robertson Stephens”), an SEC-registered investment advisor. Registration does not imply any specific level of skill or training and does not constitute an endorsement of the firm by the Commission. This material is for general informational purposes only and should not be construed as investment, tax or legal advice. It does not constitute a recommendation or offer to buy or sell any security, has not been tailored to the needs of any specific investor, and should not provide the basis for any investment decision. Please consult with your Advisor prior to making any Investment decisions. The information contained herein was compiled from sources believed to be reliable, but Robertson Stephens does not guarantee its accuracy or completeness. Information, views and opinions are current as of the date of this presentation, are based on the information available at the time, and are subject to change based on market and other conditions. Robertson Stephens assumes no duty to update this information. Unless otherwise noted, any individual opinions presented are those of the author and not necessarily those of Robertson Stephens. Performance may be compared to several indices. Indices are unmanaged and reflect the reinvestment of all income or dividends but do not reflect the deduction of any fees or expenses which would reduce returns. A complete list of Robertson Stephens Investment Office recommendations over the previous 12 months is available upon request. Past performance does not guarantee future results. Forward-looking performance targets or estimates are not guaranteed and may not be achieved. Investing entails risks, including possible loss of principal. Alternative investments are only available to qualified investors and are not suitable for all investors. Alternative investments include risks such as illiquidity, long time horizons, reduced transparency, and significant loss of principal. This material is an investment advisory publication intended for investment advisory clients and prospective clients only. Robertson Stephens only transacts business in states in which it is properly registered or is excluded or exempted from registration. A copy of Robertson Stephens’ current written disclosure brochure filed with the SEC which discusses, among other things, Robertson Stephens’ business practices, services and fees, is available through the SEC’s website at: www.adviserinfo.sec.gov. © 2026 Robertson Stephens Wealth Management, LLC. All rights reserved. Robertson Stephens is a registered trademark of Robertson Stephens Wealth Management, LLC in the United States and elsewhere. A3085

Talk To Us