Compare how a symbol performed in different years to validate seasonal patterns.
What YoY Comparison Shows
- Whether a pattern is consistent or driven by outliers
- How recent years compare to historical averages
- If the pattern is strengthening or weakening
How to Use on SeasOptima
- Go to any symbol page
- Scroll to Year-over-Year Comparison
- Select years to compare (e.g., last 5 vs last 15)
- Look for convergence or divergence
Reading the Chart
| Pattern | What It Means |
|---|---|
| Lines cluster together | Consistent pattern - reliable |
| Lines spread apart | Inconsistent - use caution |
| Recent years differ from old | Pattern may be changing |
| All years follow same shape | Strong seasonal tendency |
Past performance does not guarantee future results.
Practical Example
S&P 500 in Q4:
- Most years show October dip, November rally
- Years that diverge: 2008, 2018 (bear markets)
- Observation: Q4 strength has historically required bull market context
Red Flags
- Only 1-2 years driving the average
- Recent years consistently different from long-term
- High standard deviation between years
- Fundamentals have changed (e.g., company pivot)
Analytical Tip
Combine YoY with Market Regime filter. If 80% of bull market years align but bear market years diverge - the pattern has historically only worked in bull markets.
This is statistical analysis of historical data, not investment advice. Always do your own research.
Generated with SeasOptima.
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