Opportunities When Extremes in the Investors Intelligence Bull/Bear Ratio Occur

By LaRue Gibson on November 4, 2025

From Insights To Action

A White Paper from LRG Wealth Advisors

Since its inception in 1963, the Investors Intelligence Bull/Bear Ratio has served as one of the most respected measures of investor sentiment. Compiled weekly from the published views of professional newsletter writers, the survey categorizes respondents as bullish, bearish, or expecting a correction. The resulting ratio—bulls divided by bears—quantifies the degree of optimism or pessimism among professional market observers.

Historically, extreme optimism (high Bull/Bear ratios) has indicated overconfidence and complacency, conditions that often precede weaker equity performance. Conversely, extreme pessimism (low Bull/Bear ratios) typically signals fear and capitulation, conditions that have historically preceded strong equity recoveries. These relationships reflect one of the market’s most durable behavioral patterns: when sentiment leans too far in one direction, the next major move often unfolds the other way.

At LRG Wealth Advisors, we incorporate the Investors Intelligence Bull/Bear Ratio into our broader suite of technical and macroeconomic tools that guide tactical exposure to equities. By comparing current readings against historical percentiles, we identify when optimism or pessimism has reached levels that may warrant portfolio adjustments—whether by reducing risk exposure when enthusiasm is excessive or selectively increasing equity allocations when fear dominates.

Our intent is not to forecast short-term turning points, but to contextualize sentiment as part of a disciplined, evidence-based process. This approach helps mitigate the emotional tendencies that lead investors to buy near peaks and sell near troughs. The Bull/Bear Ratio, therefore, acts as a behavioral compass—one that complements valuation, earnings, and liquidity analysis within our tactical decision-making framework.

Methodology and Data Sources

• S&P 500 Index Pricing and Performance Data: Bloomberg Finance L.P. [January 4, 1963 through November 1, 2025]
• Investors Intelligence Bull/Bear Ratio: Investors Intelligence Weekly Sentiment Survey [January 4, 1963 through October 29, 2025]

Forward returns were measured across six horizons—63, 126, 250, 500, 750, and 1000 trading days. These equate to 3 months, 6 months, 1 year, 2 years, 3 years, and 4 years of market activity.

Excessive Optimism (≥90th Percentile)

The table below summarizes S&P 500 forward returns following periods where the Investors Intelligence Bull/Bear Ratio reached or exceeded its 90th percentile. Results indicate that market performance tends to lag typical outcomes during periods of elevated optimism.

Excessive Pessimism (≤10th Percentile)

The table below summarizes S&P 500 forward returns following periods where the Investors Intelligence Bull/Bear Ratio fell to or below its 10th percentile. Results demonstrate that deep pessimism has historically coincided with above-average forward performance, particularly over longer horizons.

Observation Summary

The table below shows the total number of S&P 500 forward return observations for each trading horizon. These represent all overlapping measurement periods from 1963 through 2025 based on available weekly Investors Intelligence Bull/Bear Ratio data. Beneath those totals, the counts for extreme sentiment readings — the top 10% (≥ 90th Percentile, excessive optimism) and bottom 10% (≤ 10th Percentile, excessive pessimism) — are shown for each respective horizon.

Across roughly three thousand data points per horizon, the distribution of extremes remains remarkably stable:

• Excessive optimism (≥ 90th Percentile) occurred in about 10 percent of total observations, consistent with the design of percentile thresholds.
• Excessive pessimism (≤ 10th Percentile) occurred with similar frequency, though these readings were more evenly distributed across longer horizons.
• The declining total number of observations at longer horizons (500–1000 days) reflects the shrinking sample size as forward-return windows lengthen.

This structure underscores the statistical symmetry of the sentiment data while emphasizing how rare but influential extremes — roughly one in ten observations — shape the market’s cyclical behavior. 

Conclusion

The Investors Intelligence Bull/Bear Ratio remains one of the most enduring and informative sentiment indicators available to market participants. More than sixty years of data confirm its contrarian value—when optimism reaches euphoric extremes, subsequent market returns tend to lag; when pessimism prevails, forward returns often exceed long-term averages.

For long-term investors, these results reinforce a fundamental principle: emotional discipline and patience tend to outperform consensus enthusiasm or despair. While extremes in sentiment occur infrequently—roughly ten percent of all recorded observations—they exert outsized influence over future market behavior. Recognizing and responding to these inflection points enables investors to align capital with opportunity rather than emotion.

At LRG Wealth Advisors, sentiment analysis serves as one input among many in our multi-factor investment process. The insights drawn from the Bull/Bear Ratio are not signals to act in isolation, but rather context for assessing risk appetite, market breadth, and valuation. By continuously updating and refining this research, we reaffirm our commitment to delivering perspective-driven investment counsel that helps clients navigate markets with clarity and conviction.

LRG Wealth Advisors
(646) 434-3134
LRGWealthAdvisors@HightowerAdvisors.com
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