TLT vs SPY: Complete Comparison
iShares 20+ Year Treasury Bond ETF vs SPDR S&P 500 ETF Trust — 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
🏆 SPY wins this comparison
Key Factors
▶Additional Metrics (5)
Bottom line: SPY wins with better expense ratio and number of holdings and 5-year return. Consider SPY for your portfolio, but TLT 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 | TLT Weight | SPY Weight | Overlap |
|---|
Top Holdings Only in TLT
Unique to TLT
| Symbol | Name | Weight |
|---|---|---|
| UST-30Y | US Treasury 30Y | 15.85% |
| UST-20Y | US Treasury 20Y | 13.85% |
| UST-25Y | US Treasury 25Y | 11.85% |
| UST-30Y-2 | US Treasury 30Y Bond 2 | 9.85% |
| UST-20Y-2 | US Treasury 20Y Bond 2 | 8.85% |
Top Holdings Only in SPY
Unique to SPY
| Symbol | Name | Weight |
|---|---|---|
| NVDA | NVDA | 7.73% |
| AAPL | AAPL | 6.82% |
| MSFT | MSFT | 6.11% |
| AMZN | AMZN | 3.81% |
| GOOGL | GOOGL | 3.08% |
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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