TSBIX vs. FIBUX
TSBIX (TIAA-CREF Core Impact Bond Fund Institutional Class) and FIBUX (Fidelity Flex U.S. Bond Index Fund) are both Total Bond Market funds. Over the past 5 years, TSBIX returned 0.04%/yr vs -0.57%/yr for FIBUX. Their correlation of 0.95 means they have usually moved in the same direction. TSBIX charges 0.35%/yr vs 0.00%/yr for FIBUX.
Performance
TSBIX vs. FIBUX - Performance Comparison
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Returns By Period
In the year-to-date period, TSBIX achieves a -0.52% return, which is significantly higher than FIBUX's -0.85% return.
TSBIX
- 1D
- -0.22%
- 1M
- -1.44%
- 6M
- -0.88%
- YTD
- -0.52%
- 1Y
- 2.58%
- 3Y*
- 5.11%
- 5Y*
- 0.04%
- 10Y*
- 1.85%
- ALL TIME*
- 2.38%
FIBUX
- 1D
- -0.22%
- 1M
- -1.43%
- 6M
- -0.97%
- YTD
- -0.85%
- 1Y
- 1.53%
- 3Y*
- 3.79%
- 5Y*
- -0.57%
- 10Y*
- —
- ALL TIME*
- 1.61%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
TSBIX vs. FIBUX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TSBIX TIAA-CREF Core Impact Bond Fund Institutional Class | -0.52% | 8.69% | 3.32% | 6.05% | -14.43% | -1.03% | 7.43% | 8.94% | 0.08% | 4.19% |
FIBUX Fidelity Flex U.S. Bond Index Fund | -0.85% | 7.20% | 1.31% | 5.46% | -13.41% | -2.16% | 7.08% | 8.58% | 0.12% | 3.81% |
Correlation
The correlation between TSBIX and FIBUX is 0.94, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.94 |
Correlation (3Y) Balances recent behavior with more history. | 0.96 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.97 |
Correlation (All Time) Calculated using the full available price history since Mar 9, 2017 | 0.95 |
The correlation between TSBIX and FIBUX has been stable across timeframes, ranging from 0.94 to 0.97 - a consistent structural relationship.
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Return for Risk
TSBIX vs. FIBUX — Risk / Return Rank
TSBIX
FIBUX
TSBIX vs. FIBUX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for TIAA-CREF Core Impact Bond Fund Institutional Class (TSBIX) and Fidelity Flex U.S. Bond Index Fund (FIBUX). 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.
| TSBIX | FIBUX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.26 | ||
| Sortino ratioReturn per unit of downside risk | +0.39 | ||
| Omega ratioGain probability vs. loss probability | 1.16 | 1.11 | +0.04 |
| Calmar ratioReturn relative to maximum drawdown | 1.15 | 0.82 | +0.32 |
| Martin ratioReturn relative to average drawdown | 2.88 | 1.99 | +0.89 |
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Drawdowns
TSBIX vs. FIBUX - Drawdown Comparison
The maximum TSBIX drawdown since its inception was -19.21%, roughly equal to the maximum FIBUX drawdown of -19.76%. Use the drawdown chart below to compare losses from any high point for TSBIX and FIBUX.
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Drawdown Indicators
| TSBIX | FIBUX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.21% | -19.76% | +0.55% |
Max Drawdown (1Y)Largest decline over 1 year | -2.87% | -2.97% | +0.10% |
Max Drawdown (3Y)Largest decline over 3 years | -4.92% | -5.08% | +0.16% |
Max Drawdown (5Y)Largest decline over 5 years | -19.10% | -18.34% | -0.76% |
Max Drawdown (10Y)Largest decline over 10 years | -19.21% | — | — |
Current DrawdownCurrent decline from peak | -2.50% | -4.70% | +2.20% |
Average DrawdownAverage peak-to-trough decline | -3.53% | -5.76% | +2.23% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.14% | 1.22% | -0.08% |
Volatility
TSBIX vs. FIBUX - Volatility Comparison
TIAA-CREF Core Impact Bond Fund Institutional Class (TSBIX) and Fidelity Flex U.S. Bond Index Fund (FIBUX) have volatilities of 0.95% and 0.99%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TSBIX | FIBUX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.95% | 0.99% | -0.04% |
Volatility (6M)Calculated over the trailing 6-month period | 2.93% | 3.02% | -0.09% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.71% | 3.87% | -0.16% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.83% | 6.04% | -0.21% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.85% | 5.09% | -0.24% |
TSBIX vs. FIBUX - Expense Ratio Comparison
TSBIX has a 0.35% expense ratio, which is higher than FIBUX's 0.00% expense ratio.
Dividends
TSBIX vs. FIBUX - Dividend Comparison
TSBIX's dividend yield for the trailing twelve months is around 4.44%, more than FIBUX's 3.82% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FIBUX Fidelity Flex U.S. Bond Index Fund | 3.82% | 3.95% | 3.65% | 2.93% | 1.62% | 1.18% | 2.32% | 2.96% | 2.70% | 2.45% | 0.00% | 0.00% |
TSBIX TIAA-CREF Core Impact Bond Fund Institutional Class | 4.44% | 5.38% | 5.10% | 3.77% | 2.31% | 1.69% | 4.56% | 3.68% | 2.63% | 2.45% | 3.19% | 2.89% |
Frequently Asked Questions
With a correlation of 0.94, TSBIX and FIBUX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
FIBUX has higher volatility (0.99%) compared to TSBIX (0.95%). In terms of maximum drawdown, TSBIX dropped -19.21% vs FIBUX's -19.76%.
TSBIX currently has the higher Sharpe Ratio (0.89 vs 0.64), 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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