How the S&P 500 hides weakness in the U.S. Market

SP500

Key zone: 7,750 - 7,850

Buy: 7,900 (on a confirmed breakout at 7,850); target 8,100; StopLoss 7,840

Sell: 7,750 (on strong negative fundamentals); target 7,550; StopLoss 7,810

The U.S. stock market looks considerably stronger than it actually is. The S&P 500 remains near its all-time high, yet a significant portion of its constituent companies have already retreated sharply from their peaks. Elevated Treasury yields remain an additional source of pressure.

Record index levels are becoming increasingly less representative of the overall market's condition.

A reminder:

On October 7, the S&P 500 closed down 0.22% at 7,801.77 points. The previous day, the index had closed at a record level of approximately 7,819 points. Thus, even after the correction, it remained just 0.22% below its all-time high.

The picture within the index, however, is considerably weaker:

• More than 40% of its constituents were trading at least 20% below their 52-week highs.
• 212 companies were already in individual bear-market territory.
• 17 companies had lost more than 50% of their value from their peaks.
• Over the past 12 months, the S&P 500 had gained 15.3%, while its year-to-date return in 2026 stood at 12.2%.

This creates a paradox: the index itself continues to rise, while fewer and fewer of its constituents participate in the advance. The real danger for the market is not so much the weakness of individual stocks as the concentration of gains among a narrow group of the largest companies.

The explanation lies in how the S&P 500 is constructed. The index is weighted by market capitalization adjusted for shares available for public trading, or free float. As a result, movements in the largest constituents have a far greater impact on the index's overall performance than changes in the prices of most other stocks.

For example, if a company has an 8.4% weight in the index, a 10% increase in its share price adds approximately 0.84 percentage points to the S&P 500, assuming the prices of all other constituents remain unchanged. Consequently, gains in a handful of giants can completely offset declines in dozens or even hundreds of smaller-cap companies.

That is why an S&P 500 record alone is no longer sufficient to assess the health of the U.S. stock market. The key question becomes market breadth: how many companies are actually supporting the uptrend?

In this environment, traders need to monitor several indicators simultaneously:

• S&P 500 Equal Weight / S&P 500: a sustained increase in the ratio would indicate that gains are beginning to spread beyond the largest companies.
• Percentage of stocks above their 200-day moving averages: an increase would signal an improvement in the market's medium-term structure.
• 10-year Treasury yield: stabilization or a decline could ease pressure on interest-rate-sensitive segments.
• Ratio of new 52-week highs to new 52-week lows: an improvement in this indicator would signal reduced selling activity.

Depending on how these indicators behave, the market could follow one of three paths:

• Broadening rally — positive scenario. If Treasury yields begin to decline and corporate earnings remain strong, capital could return to financials, industrials, consumer sectors, and other lagging segments. The S&P 500 rally would then gain a broader foundation.
• Continued concentration — base-case scenario. The largest technology companies continue to support the index near record levels, while most other stocks remain under pressure. In this case, selecting individual stocks becomes more important than simply buying the index.
• Correction in market leaders — negative scenario. Another increase in Treasury yields or deteriorating earnings expectations for the technology sector could prompt investors to take profits in the largest constituents. Given the current concentration, a decline in these stocks could quickly drag down the entire index.

So What Is the Bottom Line?

High market capitalization does not mean the market is broadly healthy. At the same time, the current situation does not guarantee a decline in the S&P 500. The largest technology companies still hold strong competitive positions, while investment in AI infrastructure supports expectations for further growth in corporate earnings.

The probability of each scenario cannot be assessed without a quantitative model. But as long as the index remains near record highs primarily because of a limited number of leaders, betting on the broad market becomes a less obvious choice. Under these conditions, it is more important to control risk, compare the relative strength of individual stocks, and seek confirmation of price movements through market-breadth indicators.

For the S&P 500 to gain truly sustainable momentum for its next stage of growth, new highs in Nvidia and other technology giants will not be enough. Buyers must also return to the hundreds of companies that remain outside the main rally.

So we act wisely and avoid unnecessary risks.

Profits to y’all!