SPY vs IWB: Complete Comparison
SPDR S&P 500 ETF Trust vs iShares Russell 1000 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 SPY wins this comparison
Key Factors
โถAdditional Metrics (5)
Bottom line: SPY wins with better expense ratio. Consider SPY for your portfolio, but IWB is still a solid choice if you prefer its specific advantages.
Detailed Overlap Analysis
420 shared holdings representing 80.3% portfolio overlap
Top Shared Holdings
| # | Stock | SPY Weight | IWB Weight | Overlap |
|---|---|---|---|---|
| 1 | NVDA NVDA | 7.73% | 6.89% | 6.89% |
| 2 | AAPL AAPL | 6.82% | 6.43% | 6.43% |
| 3 | MSFT MSFT | 6.11% | 5.78% | 5.78% |
| 4 | AMZN AMZN | 3.81% | 3.45% | 3.45% |
| 5 | GOOGL GOOGL | 3.08% | 2.89% | 2.89% |
| 6 | AVGO AVGO | 2.79% | 2.94% | 2.79% |
| 7 | GOOG GOOG | 2.47% | 2.36% | 2.36% |
| 8 | META META | 2.45% | 2.31% | 2.31% |
| 9 | TSLA TSLA | 2.30% | 1.96% | 1.96% |
| 10 | BRK-B BRK-B | 1.55% | 1.46% | 1.46% |
Overlap by Sector
Showing top 5 sectors by overlap contribution
Top Holdings Only in SPY
Unique to SPY
| Symbol | Name | Weight |
|---|---|---|
| PLTR | PLTR | 0.75% |
| BAC | BAC | 0.64% |
| AMD | AMD | 0.59% |
| HD | HD | 0.58% |
| PG | PG | 0.57% |
Top Holdings Only in IWB
Unique to IWB
| Symbol | Name | Weight |
|---|---|---|
| SPOT | SPOT | 0.28% |
| NU | NU | 0.18% |
| MRVL | MRVL | 0.13% |
| DASH | DASH | 0.13% |
| VRT | VRT | 0.11% |
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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