MFIOX vs. TIBDX
MFIOX (MFS Income Fund) and TIBDX (TIAA-CREF Core Bond Fund) are both Intermediate Core-Plus Bond funds. Over the past 10 years, MFIOX returned 2.70%/yr vs 1.92%/yr for TIBDX. A 0.73 correlation means they provide meaningful diversification when combined. MFIOX charges 0.73%/yr vs 0.29%/yr for TIBDX.
Performance
MFIOX vs. TIBDX - Performance Comparison
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Returns By Period
The year-to-date returns for both stocks are quite close, with MFIOX having a 0.46% return and TIBDX slightly lower at 0.45%. Over the past 10 years, MFIOX has outperformed TIBDX with an annualized return of 2.70%, while TIBDX has yielded a comparatively lower 1.92% annualized return.
MFIOX
- 1D
- 0.17%
- 1M
- 0.75%
- YTD
- 0.46%
- 6M
- 0.67%
- 1Y
- 4.60%
- 3Y*
- 5.00%
- 5Y*
- 0.54%
- 10Y*
- 2.70%
TIBDX
- 1D
- 0.11%
- 1M
- 0.71%
- YTD
- 0.45%
- 6M
- 0.71%
- 1Y
- 4.64%
- 3Y*
- 4.22%
- 5Y*
- 0.10%
- 10Y*
- 1.92%
MFIOX vs. TIBDX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MFIOX MFS Income Fund | 0.46% | 7.37% | 2.66% | 7.46% | -14.14% | -0.28% | 9.47% | 11.36% | -2.38% | 5.73% |
TIBDX TIAA-CREF Core Bond Fund | 0.45% | 7.38% | 1.95% | 5.63% | -13.68% | -0.95% | 8.10% | 9.57% | -0.64% | 4.48% |
Correlation
The correlation between MFIOX and TIBDX is 0.92, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.92 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.95 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.96 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.90 |
Correlation (All Time) Calculated using the full available price history since Jun 14, 1999 | 0.73 |
The correlation between MFIOX and TIBDX shifts across timeframes, from 0.73 (all time) to 0.95 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
MFIOX vs. TIBDX — Risk / Return Rank
MFIOX
TIBDX
MFIOX vs. TIBDX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Income Fund (MFIOX) and TIAA-CREF Core Bond Fund (TIBDX). 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.
| MFIOX | TIBDX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.02 | ||
| Sortino ratioReturn per unit of downside risk | +0.05 | ||
| Omega ratioGain probability vs. loss probability | 1.24 | 1.23 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.70 | 1.69 | +0.02 |
| Martin ratioReturn relative to average drawdown | 5.18 | 4.96 | +0.22 |
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Drawdowns
MFIOX vs. TIBDX - Drawdown Comparison
The maximum MFIOX drawdown since its inception was -19.07%, roughly equal to the maximum TIBDX drawdown of -18.82%. Use the drawdown chart below to compare losses from any high point for MFIOX and TIBDX.
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Drawdown Indicators
| MFIOX | TIBDX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.07% | -18.82% | -0.25% |
Max Drawdown (1Y)Largest decline over 1 year | -2.81% | -2.98% | +0.17% |
Max Drawdown (3Y)Largest decline over 3 years | -5.88% | -6.29% | +0.41% |
Max Drawdown (5Y)Largest decline over 5 years | -19.07% | -18.82% | -0.25% |
Max Drawdown (10Y)Largest decline over 10 years | -19.07% | -18.82% | -0.25% |
Current DrawdownCurrent decline from peak | -1.14% | -1.43% | +0.29% |
Average DrawdownAverage peak-to-trough decline | -2.18% | -2.30% | +0.12% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.92% | 1.01% | -0.09% |
Volatility
MFIOX vs. TIBDX - Volatility Comparison
MFS Income Fund (MFIOX) and TIAA-CREF Core Bond Fund (TIBDX) have volatilities of 1.12% and 1.10%, 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
| MFIOX | TIBDX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.12% | 1.10% | +0.02% |
Volatility (6M)Calculated over the trailing 6-month period | 2.71% | 2.95% | -0.24% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.65% | 3.88% | -0.23% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.52% | 5.64% | -0.12% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.88% | 4.74% | +0.14% |
MFIOX vs. TIBDX - Expense Ratio Comparison
MFIOX has a 0.73% expense ratio, which is higher than TIBDX's 0.29% expense ratio.
Dividends
MFIOX vs. TIBDX - Dividend Comparison
MFIOX's dividend yield for the trailing twelve months is around 4.70%, more than TIBDX's 4.46% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MFIOX MFS Income Fund | 4.70% | 4.70% | 5.04% | 4.72% | 2.24% | 3.29% | 2.80% | 3.04% | 3.07% | 3.26% | 3.61% | 4.35% |
TIBDX TIAA-CREF Core Bond Fund | 4.46% | 4.34% | 3.60% | 3.22% | 2.44% | 2.39% | 4.45% | 3.09% | 2.88% | 2.93% | 3.80% | 4.68% |
Frequently Asked Questions
With a correlation of 0.92, MFIOX and TIBDX 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.
MFIOX has higher volatility (1.12%) compared to TIBDX (1.10%). In terms of maximum drawdown, MFIOX dropped -19.07% vs TIBDX's -18.82%.
MFIOX currently has the higher Sharpe Ratio (1.32 vs 1.30), 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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