IBB vs DIA: Complete Comparison
iShares Biotechnology ETF vs SPDR Dow Jones Industrial Average ETF โ overlap, correlation, performance & risk analysis
Visual Overlap
Price Performance
Historical price comparison over 3M
๐Performance Comparison
โ ๏ธRisk Metrics
Interpretation:
- ๐ Lower volatility = smoother ride
- โก Higher Sharpe/Sortino = better risk-adjusted returns
- โ ๏ธ Smaller max drawdown = less worst-case pain
- ๐ Beta > 1 = more volatile than S&P 500
โ๏ธHead-to-Head Comparison
๐ DIA wins this comparison
Key Factors
โถAdditional Metrics (5)
Bottom line: DIA wins with better expense ratio and 5-year return. Consider DIA for your portfolio, but IBB is still a solid choice if you prefer its specific advantages.
Detailed Overlap Analysis
1 shared holdings representing 7.3% portfolio overlap
Top Shared Holdings
| # | Stock | IBB Weight | DIA Weight | Overlap |
|---|---|---|---|---|
| 1 | AMGN AMGN | 7.27% | 5.85% | 5.85% |
Overlap by Sector
Showing top 5 sectors by overlap contribution
Top Holdings Only in IBB
Unique to IBB
| Symbol | Name | Weight |
|---|---|---|
| VRTX | VRTX | 7.36% |
| GILD | GILD | 6.99% |
| REGN | REGN | 6.07% |
| ALNY | ALNY | 4.56% |
| INSM | INSM | 3.43% |
Top Holdings Only in DIA
Unique to DIA
| Symbol | Name | Weight |
|---|---|---|
| UNH | UnitedHealth Group | 9.85% |
| GS | Goldman Sachs | 8.25% |
| MSFT | Microsoft Corp | 6.85% |
| HD | Home Depot | 6.65% |
| CAT | Caterpillar Inc | 6.25% |
Price Correlation
How We Calculate Overlap
We use the minimum weight method with normalization to calculate portfolio overlap:
Overlap = ฮฃ min(weightA, weightB) for each shared holdingNormalization: Holdings weights are normalized to sum to 100% before comparison. This ensures accurate overlap calculations even when analyzing partial holdings data (e.g., top 50 positions).
Conservative approach: We consider only the smaller allocation for each shared position, giving you a realistic view of true portfolio overlap.
๐ This analysis is based on publicly available holdings data. For the most current and complete holdings information, please visit the official ETF provider websites.
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