IBB vs VTI: Complete Comparison
iShares Biotechnology ETF vs Vanguard Total Stock Market ETF — overlap, correlation, performance & risk analysis
Visual Overlap
Price Performance
Historical price comparison over 3M
📈Performance Comparison
⚠️Risk Metrics
Interpretation:
- 📊 Lower volatility = smoother ride
- ⚡ Higher Sharpe/Sortino = better risk-adjusted returns
- ⚠️ Smaller max drawdown = less worst-case pain
- 📈 Beta > 1 = more volatile than S&P 500
⚔️Head-to-Head Comparison
🏆 VTI wins this comparison
Key Factors
▶Additional Metrics (5)
Bottom line: VTI wins with better expense ratio and number of holdings and 5-year return. Consider VTI for your portfolio, but IBB is still a solid choice if you prefer its specific advantages.
Detailed Overlap Analysis
0 shared holdings representing 0.0% portfolio overlap
Top Shared Holdings
| # | Stock | IBB Weight | VTI Weight | Overlap |
|---|
Top Holdings Only in IBB
Unique to IBB
| Symbol | Name | Weight |
|---|---|---|
| VRTX | VRTX | 7.36% |
| AMGN | AMGN | 7.27% |
| GILD | GILD | 6.99% |
| REGN | REGN | 6.07% |
| ALNY | ALNY | 4.56% |
Top Holdings Only in VTI
Unique to VTI
| Symbol | Name | Weight |
|---|---|---|
| AAPL | Apple Inc | 5.80% |
| MSFT | Microsoft Corp | 5.45% |
| NVDA | NVIDIA Corp | 4.25% |
| AMZN | Amazon.com Inc | 3.00% |
| META | Meta Platforms Inc | 2.02% |
Price Correlation
How We Calculate Overlap
We use the minimum weight method with normalization to calculate portfolio overlap:
Overlap = Σ 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.
📊 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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