TIBDX vs. OIFIX

Last updated Jun 4, 2026

TIBDX (TIAA-CREF Core Bond Fund) and OIFIX (Optimum Fixed Income Fund) are both Intermediate Core-Plus Bond funds. Over the past 10 years, TIBDX returned 1.99%/yr vs 2.05%/yr for OIFIX. Their correlation of 0.88 suggests significant overlap in exposure. TIBDX charges 0.29%/yr vs 0.80%/yr for OIFIX.

Performance

TIBDX vs. OIFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in TIAA-CREF Core Bond Fund (TIBDX) and Optimum Fixed Income Fund (OIFIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TIBDX achieves a 0.67% return, which is significantly higher than OIFIX's 0.24% return. Both investments have delivered pretty close results over the past 10 years, with TIBDX having a 1.99% annualized return and OIFIX not far ahead at 2.05%.

TIBDX

• 1D: 0.00%
• 1M: 0.60%
• YTD: 0.67%
• 6M: 0.72%
• 1Y: 6.03%
• 3Y*: 4.33%
• 5Y*: 0.25%
• 10Y*: 1.99%

OIFIX

• 1D: 0.00%
• 1M: 0.48%
• YTD: 0.24%
• 6M: 0.27%
• 1Y: 5.79%
• 3Y*: 4.33%
• 5Y*: 0.02%
• 10Y*: 2.05%

*Multi-year figures are annualized to reflect compound growth (CAGR)

TIBDX vs. OIFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TIBDX TIAA-CREF Core Bond Fund	0.67%	7.38%	1.95%	5.63%	-13.68%	-0.95%	8.10%	9.57%	-0.64%	4.48%
OIFIX Optimum Fixed Income Fund	0.24%	7.64%	1.49%	5.90%	-13.96%	-1.78%	11.14%	8.63%	-0.70%	4.50%

Correlation

The correlation between TIBDX and OIFIX is 0.89, 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	0.89
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Jul 24, 2003	0.88

The correlation between TIBDX and OIFIX has been stable across timeframes, ranging from 0.88 to 0.94 - a consistent structural relationship.

Return for Risk

TIBDX vs. OIFIX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

TIBDX

TIBDX Risk / Return Rank: 30
TIBDX Sharpe Ratio Rank: 30
TIBDX Sortino Ratio Rank: 32
TIBDX Omega Ratio Rank: 30
TIBDX Calmar Ratio Rank: 30
TIBDX Martin Ratio Rank: 26

OIFIX

OIFIX Risk / Return Rank: 27
OIFIX Sharpe Ratio Rank: 27
OIFIX Sortino Ratio Rank: 28
OIFIX Omega Ratio Rank: 26
OIFIX Calmar Ratio Rank: 28
OIFIX Martin Ratio Rank: 25

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

TIBDX vs. OIFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TIAA-CREF Core Bond Fund (TIBDX) and Optimum Fixed Income Fund (OIFIX). 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.

	TIBDX	OIFIX	Difference
Sharpe ratio: Return per unit of total volatility	1.56	1.47	+0.09
Sortino ratio: Return per unit of downside risk	2.34	2.19	+0.14
Omega ratio: Gain probability vs. loss probability	1.29	1.27	+0.02
Calmar ratio: Return relative to maximum drawdown	2.04	1.96	+0.08
Martin ratio: Return relative to average drawdown	6.36	6.14	+0.22
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TIBDX vs. OIFIX - Sharpe Ratio Comparison

The current TIBDX Sharpe Ratio is 1.56, which is comparable to the OIFIX Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of TIBDX and OIFIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	TIBDX	OIFIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.56	1.47	+0.09
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.05	0.00	+0.04
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.42	0.42	0.00
Sharpe Ratio (All Time) Calculated using the full available price history	0.95	0.88	+0.07

Drawdowns

TIBDX vs. OIFIX - Drawdown Comparison

The maximum TIBDX drawdown since its inception was -18.82%, roughly equal to the maximum OIFIX drawdown of -19.46%. Use the drawdown chart below to compare losses from any high point for TIBDX and OIFIX.

Drawdown Indicators

	TIBDX	OIFIX	Difference
Max Drawdown Largest peak-to-trough decline	-18.82%	-19.46%	+0.64%
Max Drawdown (1Y) Largest decline over 1 year	-2.98%	-2.96%	-0.02%
Max Drawdown (3Y) Largest decline over 3 years	-6.29%	-6.67%	+0.38%
Max Drawdown (5Y) Largest decline over 5 years	-18.82%	-19.30%	+0.48%
Max Drawdown (10Y) Largest decline over 10 years	-18.82%	-19.46%	+0.64%
Current Drawdown Current decline from peak	-1.22%	-1.99%	+0.77%
Average Drawdown Average peak-to-trough decline	-2.30%	-2.93%	+0.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.95%	0.95%	0.00%

Volatility

TIBDX vs. OIFIX - Volatility Comparison

TIAA-CREF Core Bond Fund (TIBDX) and Optimum Fixed Income Fund (OIFIX) have volatilities of 1.39% and 1.43%, 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.

Volatility by Period

	TIBDX	OIFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.39%	1.43%	-0.04%
Volatility (6M) Calculated over the trailing 6-month period	2.88%	2.80%	+0.08%
Volatility (1Y) Calculated over the trailing 1-year period	3.90%	3.96%	-0.06%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.63%	5.90%	-0.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.73%	4.87%	-0.14%

TIBDX vs. OIFIX - Expense Ratio Comparison

TIBDX has a 0.29% expense ratio, which is lower than OIFIX's 0.80% expense ratio.

Dividends

TIBDX vs. OIFIX - Dividend Comparison

TIBDX's dividend yield for the trailing twelve months is around 4.45%, more than OIFIX's 3.85% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OIFIX Optimum Fixed Income Fund	3.85%	3.86%	3.97%	3.23%	3.42%	2.21%	6.88%	3.22%	2.43%	2.50%	2.17%	3.24%
TIBDX TIAA-CREF Core Bond Fund	4.45%	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

Can I hold both TIBDX and OIFIX in my portfolio?

TIBDX and OIFIX have a correlation of 0.89, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TIBDX or OIFIX?

OIFIX has higher volatility (1.43%) compared to TIBDX (1.39%). In terms of maximum drawdown, TIBDX dropped -18.82% vs OIFIX's -19.46%.

Which has better risk-adjusted returns?

TIBDX currently has the higher Sharpe Ratio (1.56 vs 1.47), 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.