BIRDX vs. WFSPX
Compare and contrast key facts about iShares Developed Real Estate Index Fund (BIRDX) and iShares S&P 500 Index Fund (WFSPX).
BIRDX is managed by BlackRock. It was launched on Aug 12, 2015. WFSPX is a passively managed fund by BlackRock that tracks the performance of the S&P 500 Index. It was launched on Jul 30, 1993.
Performance
BIRDX vs. WFSPX - Performance Comparison
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BIRDX vs. WFSPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BIRDX iShares Developed Real Estate Index Fund | 1.72% | 10.27% | 1.49% | 10.38% | -24.68% | 26.90% | -8.24% | 22.33% | -4.80% | 7.56% |
WFSPX iShares S&P 500 Index Fund | -4.63% | 17.83% | 24.94% | 26.25% | -18.14% | 28.63% | 18.43% | 31.45% | -4.83% | 21.27% |
Returns By Period
In the year-to-date period, BIRDX achieves a 1.72% return, which is significantly higher than WFSPX's -4.63% return. Over the past 10 years, BIRDX has underperformed WFSPX with an annualized return of 3.21%, while WFSPX has yielded a comparatively higher 13.92% annualized return.
BIRDX
- 1D
- 1.72%
- 1M
- -8.19%
- YTD
- 1.72%
- 6M
- 0.95%
- 1Y
- 9.53%
- 3Y*
- 7.51%
- 5Y*
- 2.19%
- 10Y*
- 3.21%
WFSPX
- 1D
- 2.62%
- 1M
- -5.31%
- YTD
- -4.63%
- 6M
- -2.47%
- 1Y
- 16.96%
- 3Y*
- 18.15%
- 5Y*
- 11.69%
- 10Y*
- 13.92%
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BIRDX vs. WFSPX - Expense Ratio Comparison
BIRDX has a 0.19% expense ratio, which is higher than WFSPX's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Return for Risk
BIRDX vs. WFSPX — Risk / Return Rank
BIRDX
WFSPX
BIRDX vs. WFSPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Developed Real Estate Index Fund (BIRDX) and iShares S&P 500 Index Fund (WFSPX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
| BIRDX | WFSPX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.70 | 0.96 | -0.26 |
Sortino ratioReturn per unit of downside risk | 1.04 | 1.47 | -0.43 |
Omega ratioGain probability vs. loss probability | 1.14 | 1.22 | -0.08 |
Calmar ratioReturn relative to maximum drawdown | 0.94 | 1.49 | -0.55 |
Martin ratioReturn relative to average drawdown | 3.74 | 7.15 | -3.41 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| BIRDX | WFSPX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.70 | 0.96 | -0.26 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.11 | 0.70 | -0.58 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.17 | 0.78 | -0.61 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.20 | 0.13 | +0.07 |
Correlation
The correlation between BIRDX and WFSPX is 0.63, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.
Dividends
BIRDX vs. WFSPX - Dividend Comparison
BIRDX's dividend yield for the trailing twelve months is around 6.72%, more than WFSPX's 1.54% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BIRDX iShares Developed Real Estate Index Fund | 6.72% | 6.84% | 23.69% | 2.99% | 1.24% | 4.18% | 1.91% | 6.67% | 4.18% | 1.70% | 2.24% | 0.00% |
WFSPX iShares S&P 500 Index Fund | 1.54% | 1.72% | 1.41% | 1.50% | 2.02% | 1.82% | 1.66% | 1.99% | 2.00% | 1.62% | 2.37% | 2.49% |
Drawdowns
BIRDX vs. WFSPX - Drawdown Comparison
The maximum BIRDX drawdown since its inception was -43.03%, smaller than the maximum WFSPX drawdown of -58.21%. Use the drawdown chart below to compare losses from any high point for BIRDX and WFSPX.
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Drawdown Indicators
| BIRDX | WFSPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -43.03% | -58.21% | +15.18% |
Max Drawdown (1Y)Largest decline over 1 year | -10.81% | -12.11% | +1.30% |
Max Drawdown (5Y)Largest decline over 5 years | -32.54% | -24.51% | -8.03% |
Max Drawdown (10Y)Largest decline over 10 years | -43.03% | -33.74% | -9.29% |
Current DrawdownCurrent decline from peak | -11.17% | -6.51% | -4.66% |
Average DrawdownAverage peak-to-trough decline | -10.94% | -12.84% | +1.90% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.73% | 2.53% | +0.20% |
Volatility
BIRDX vs. WFSPX - Volatility Comparison
The current volatility for iShares Developed Real Estate Index Fund (BIRDX) is 4.71%, while iShares S&P 500 Index Fund (WFSPX) has a volatility of 5.17%. This indicates that BIRDX experiences smaller price fluctuations and is considered to be less risky than WFSPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BIRDX | WFSPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.71% | 5.17% | -0.46% |
Volatility (6M)Calculated over the trailing 6-month period | 8.39% | 9.44% | -1.05% |
Volatility (1Y)Calculated over the trailing 1-year period | 14.29% | 18.21% | -3.92% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.23% | 16.88% | +2.35% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.07% | 18.00% | +1.07% |