TRSSX vs. WFBIX
TRSSX (T. Rowe Price Institutional Small Cap Stock Fund) and WFBIX (iShares U.S. Aggregate Bond Index Fund) are both mutual funds - TRSSX is a Small Cap Growth Equities fund managed by T. Rowe Price, while WFBIX is a Intermediate Core Bond fund managed by BlackRock. Over the past 10 years, TRSSX returned 11.86%/yr vs 1.91%/yr for WFBIX. At a correlation of -0.17, they often move in opposite directions. TRSSX charges 0.66%/yr vs 0.05%/yr for WFBIX.
Performance
TRSSX vs. WFBIX - Performance Comparison
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Returns By Period
In the year-to-date period, TRSSX achieves a 12.55% return, which is significantly higher than WFBIX's 0.43% return. Over the past 10 years, TRSSX has outperformed WFBIX with an annualized return of 11.86%, while WFBIX has yielded a comparatively lower 1.91% annualized return.
TRSSX
- 1D
- 3.51%
- 1M
- 0.85%
- YTD
- 12.55%
- 6M
- 10.15%
- 1Y
- 25.11%
- 3Y*
- 14.18%
- 5Y*
- 4.71%
- 10Y*
- 11.86%
WFBIX
- 1D
- 0.55%
- 1M
- 0.56%
- YTD
- 0.43%
- 6M
- 0.98%
- 1Y
- 4.88%
- 3Y*
- 5.33%
- 5Y*
- 0.82%
- 10Y*
- 1.91%
TRSSX vs. WFBIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TRSSX T. Rowe Price Institutional Small Cap Stock Fund | 12.55% | 8.21% | 10.93% | 17.65% | -23.36% | 16.81% | 25.07% | 33.96% | -3.07% | 15.41% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 0.43% | 7.16% | 1.43% | 9.65% | -13.03% | -1.79% | 7.40% | 8.72% | -0.08% | 3.39% |
Correlation
The correlation between TRSSX and WFBIX is 0.36, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.36 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.26 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.17 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.01 |
Correlation (All Time) Calculated using the full available price history since Mar 31, 2000 | -0.17 |
The correlation between TRSSX and WFBIX shifts across timeframes, from -0.17 (all time) to 0.36 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
TRSSX vs. WFBIX — Risk / Return Rank
TRSSX
WFBIX
TRSSX vs. WFBIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Institutional Small Cap Stock Fund (TRSSX) and iShares U.S. Aggregate Bond Index Fund (WFBIX). 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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| TRSSX | WFBIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.02 | ||
| Sortino ratioReturn per unit of downside risk | +0.06 | ||
| Omega ratioGain probability vs. loss probability | 1.23 | 1.22 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 2.18 | 1.62 | +0.56 |
| Martin ratioReturn relative to average drawdown | 8.21 | 4.66 | +3.55 |
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Drawdowns
TRSSX vs. WFBIX - Drawdown Comparison
The maximum TRSSX drawdown since its inception was -56.38%, which is greater than WFBIX's maximum drawdown of -18.68%. Use the drawdown chart below to compare losses from any high point for TRSSX and WFBIX.
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Drawdown Indicators
| TRSSX | WFBIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -56.38% | -18.68% | -37.70% |
Max Drawdown (1Y)Largest decline over 1 year | -10.73% | -3.02% | -7.71% |
Max Drawdown (3Y)Largest decline over 3 years | -30.88% | -6.09% | -24.79% |
Max Drawdown (5Y)Largest decline over 5 years | -32.12% | -17.84% | -14.28% |
Max Drawdown (10Y)Largest decline over 10 years | -37.85% | -18.68% | -19.17% |
Current DrawdownCurrent decline from peak | -0.22% | -1.50% | +1.28% |
Average DrawdownAverage peak-to-trough decline | -9.00% | -2.26% | -6.74% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.82% | 1.05% | +1.77% |
Volatility
TRSSX vs. WFBIX - Volatility Comparison
T. Rowe Price Institutional Small Cap Stock Fund (TRSSX) has a higher volatility of 6.59% compared to iShares U.S. Aggregate Bond Index Fund (WFBIX) at 1.36%. This indicates that TRSSX's price experiences larger fluctuations and is considered to be riskier than WFBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TRSSX | WFBIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.59% | 1.36% | +5.23% |
Volatility (6M)Calculated over the trailing 6-month period | 14.59% | 2.88% | +11.71% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.49% | 3.95% | +14.54% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.31% | 6.41% | +15.90% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.59% | 5.17% | +16.42% |
TRSSX vs. WFBIX - Expense Ratio Comparison
TRSSX has a 0.66% expense ratio, which is higher than WFBIX's 0.05% expense ratio.
Dividends
TRSSX vs. WFBIX - Dividend Comparison
TRSSX's dividend yield for the trailing twelve months is around 9.39%, more than WFBIX's 3.91% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
TRSSX T. Rowe Price Institutional Small Cap Stock Fund | 9.39% | 10.57% | 19.63% | 5.45% | 5.37% | 8.52% | 4.54% | 6.13% | 13.45% | 6.53% | 0.80% | 7.07% |
WFBIX iShares U.S. Aggregate Bond Index Fund | 3.91% | 3.78% | 3.68% | 6.82% | 2.60% | 2.04% | 2.43% | 2.88% | 2.71% | 2.24% | 2.25% | 2.20% |
Frequently Asked Questions
TRSSX and WFBIX have a correlation of 0.36, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
TRSSX has higher volatility (6.59%) compared to WFBIX (1.36%). In terms of maximum drawdown, TRSSX dropped -56.38% vs WFBIX's -18.68%.
TRSSX currently has the higher Sharpe Ratio (1.27 vs 1.25), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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