BCOSX vs. BCOIX

Last updated Jun 24, 2026

BCOSX (Baird Core Plus Bond Fund) and BCOIX (Baird Core Plus Bond Fund) are both Intermediate Core-Plus Bond funds from Baird. Over the past 10 years, BCOSX returned 2.07%/yr vs 2.37%/yr for BCOIX. With a 0.97 correlation, they move nearly in lockstep. BCOSX charges 0.55%/yr vs 0.30%/yr for BCOIX.

Performance

BCOSX vs. BCOIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Baird Core Plus Bond Fund (BCOSX) and Baird Core Plus Bond Fund (BCOIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BCOSX achieves a 0.32% return, which is significantly lower than BCOIX's 0.44% return. Over the past 10 years, BCOSX has underperformed BCOIX with an annualized return of 2.07%, while BCOIX has yielded a comparatively higher 2.37% annualized return.

BCOSX

• 1D: -0.28%
• 1M: 0.71%
• YTD: 0.32%
• 6M: 0.60%
• 1Y: 4.31%
• 3Y*: 4.52%
• 5Y*: 0.42%
• 10Y*: 2.07%

BCOIX

• 1D: -0.20%
• 1M: 0.77%
• YTD: 0.44%
• 6M: 0.67%
• 1Y: 4.51%
• 3Y*: 4.79%
• 5Y*: 0.67%
• 10Y*: 2.37%

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

BCOSX vs. BCOIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BCOSX Baird Core Plus Bond Fund	0.32%	7.22%	2.26%	6.60%	-13.09%	-1.23%	8.59%	9.69%	-0.74%	4.47%
BCOIX Baird Core Plus Bond Fund	0.44%	7.47%	2.54%	6.89%	-12.86%	-1.02%	8.80%	10.11%	-0.52%	4.65%

Correlation

The correlation between BCOSX and BCOIX is 0.96 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.96
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (10Y) Calculated over the trailing 10-year period	0.97
Correlation (All Time) Calculated using the full available price history since Sep 29, 2000	0.97

The correlation between BCOSX and BCOIX has been stable across timeframes, ranging from 0.96 to 0.98 - a consistent structural relationship.

Return for Risk

BCOSX vs. BCOIX — Risk / Return Rank

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

BCOSX

BCOSX Risk / Return Rank: 23
BCOSX Sharpe Ratio Rank: 23
BCOSX Sortino Ratio Rank: 24
BCOSX Omega Ratio Rank: 22
BCOSX Calmar Ratio Rank: 26
BCOSX Martin Ratio Rank: 21

BCOIX

BCOIX Risk / Return Rank: 26
BCOIX Sharpe Ratio Rank: 25
BCOIX Sortino Ratio Rank: 27
BCOIX Omega Ratio Rank: 24
BCOIX Calmar Ratio Rank: 29
BCOIX Martin Ratio Rank: 23

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.

BCOSX vs. BCOIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Baird Core Plus Bond Fund (BCOSX) and Baird Core Plus Bond Fund (BCOIX). 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.

	BCOSX	BCOIX	Difference
Sharpe ratio: Return per unit of total volatility	1.27	1.33	-0.06
Sortino ratio: Return per unit of downside risk	1.91	2.00	-0.09
Omega ratio: Gain probability vs. loss probability	1.23	1.24	-0.01
Calmar ratio: Return relative to maximum drawdown	1.75	1.87	-0.12
Martin ratio: Return relative to average drawdown	4.87	5.27	-0.40

BCOSX vs. BCOIX - Sharpe Ratio Comparison

The current BCOSX Sharpe Ratio is 1.27, which is comparable to the BCOIX Sharpe Ratio of 1.33. The chart below compares the historical Sharpe Ratios of BCOSX and BCOIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

BCOSX vs. BCOIX - Drawdown Comparison

The maximum BCOSX drawdown since its inception was -18.39%, roughly equal to the maximum BCOIX drawdown of -18.13%. Use the drawdown chart below to compare losses from any high point for BCOSX and BCOIX.

Drawdown Indicators

	BCOSX	BCOIX	Difference
Max Drawdown Largest peak-to-trough decline	-18.39%	-18.13%	-0.26%
Max Drawdown (1Y) Largest decline over 1 year	-2.58%	-2.58%	0.00%
Max Drawdown (3Y) Largest decline over 3 years	-5.80%	-5.61%	-0.19%
Max Drawdown (5Y) Largest decline over 5 years	-18.39%	-18.13%	-0.26%
Max Drawdown (10Y) Largest decline over 10 years	-18.39%	-18.13%	-0.26%
Current Drawdown Current decline from peak	-1.33%	-1.24%	-0.09%
Average Drawdown Average peak-to-trough decline	-2.30%	-2.18%	-0.12%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.93%	0.92%	+0.01%

Volatility

BCOSX vs. BCOIX - Volatility Comparison

Baird Core Plus Bond Fund (BCOSX) has a higher volatility of 1.10% compared to Baird Core Plus Bond Fund (BCOIX) at 1.03%. This indicates that BCOSX's price experiences larger fluctuations and is considered to be riskier than BCOIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BCOSX	BCOIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.10%	1.03%	+0.07%
Volatility (6M) Calculated over the trailing 6-month period	2.62%	2.73%	-0.11%
Volatility (1Y) Calculated over the trailing 1-year period	3.57%	3.66%	-0.09%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.63%	5.65%	-0.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.66%	4.68%	-0.02%

BCOSX vs. BCOIX - Expense Ratio Comparison

BCOSX has a 0.55% expense ratio, which is higher than BCOIX's 0.30% expense ratio.

Dividends

BCOSX vs. BCOIX - Dividend Comparison

BCOSX's dividend yield for the trailing twelve months is around 3.87%, less than BCOIX's 4.35% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BCOIX Baird Core Plus Bond Fund	4.35%	4.21%	4.13%	3.58%	3.10%	2.96%	3.51%	2.96%	3.13%	2.83%	3.01%	2.84%
BCOSX Baird Core Plus Bond Fund	3.87%	3.75%	3.68%	3.17%	2.69%	2.57%	3.11%	2.60%	2.75%	2.47%	2.27%	2.49%

Frequently Asked Questions

Can I hold both BCOSX and BCOIX in my portfolio?

With a correlation of 0.96, BCOSX and BCOIX 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.

Which is riskier, BCOSX or BCOIX?

BCOSX has higher volatility (1.10%) compared to BCOIX (1.03%). In terms of maximum drawdown, BCOSX dropped -18.39% vs BCOIX's -18.13%.

Which has better risk-adjusted returns?

BCOIX currently has the higher Sharpe Ratio (1.33 vs 1.27), 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.