BUBSX vs. PAIPX

Last updated Jun 4, 2026

BUBSX (Baird Ultra Short Bond Fund) and PAIPX (PIMCO Short Asset Investment Fund) are both Ultrashort Bond funds. Over the past 10 years, BUBSX returned 2.51%/yr vs 2.51%/yr for PAIPX. At a 0.10 correlation, their price movements are largely independent. BUBSX charges 0.40%/yr vs 0.45%/yr for PAIPX.

Performance

BUBSX vs. PAIPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Baird Ultra Short Bond Fund (BUBSX) and PIMCO Short Asset Investment Fund (PAIPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BUBSX achieves a 1.41% return, which is significantly lower than PAIPX's 1.80% return. Over a longer period, both investments have demonstrated similar performance, with their 10-year annualized returns being quite close: BUBSX at 2.51% and PAIPX at 2.51%.

BUBSX

• 1D: 0.00%
• 1M: 0.23%
• YTD: 1.41%
• 6M: 1.75%
• 1Y: 4.11%
• 3Y*: 4.96%
• 5Y*: 3.45%
• 10Y*: 2.51%

PAIPX

• 1D: 0.00%
• 1M: 0.41%
• YTD: 1.80%
• 6M: 2.25%
• 1Y: 4.65%
• 3Y*: 5.16%
• 5Y*: 3.36%
• 10Y*: 2.51%

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

BUBSX vs. PAIPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BUBSX Baird Ultra Short Bond Fund	1.41%	4.53%	5.47%	5.43%	0.70%	-0.05%	1.66%	2.87%	1.61%	1.05%
PAIPX PIMCO Short Asset Investment Fund	1.80%	4.83%	5.93%	4.55%	-0.00%	-0.19%	1.12%	2.56%	1.90%	1.82%

Correlation

The correlation between BUBSX and PAIPX is 0.12, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.12
Correlation (3Y) Calculated over the trailing 3-year period	0.06
Correlation (5Y) Calculated over the trailing 5-year period	0.08
Correlation (10Y) Calculated over the trailing 10-year period	0.10
Correlation (All Time) Calculated using the full available price history since Jan 6, 2014	0.10

Return for Risk

BUBSX vs. PAIPX — Risk / Return Rank

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

BUBSX

BUBSX Risk / Return Rank: 100
BUBSX Sharpe Ratio Rank: 100
BUBSX Sortino Ratio Rank: 100
BUBSX Omega Ratio Rank: 100
BUBSX Calmar Ratio Rank: 100
BUBSX Martin Ratio Rank: 100

PAIPX

PAIPX Risk / Return Rank: 100
PAIPX Sharpe Ratio Rank: 98
PAIPX Sortino Ratio Rank: 100
PAIPX Omega Ratio Rank: 100
PAIPX Calmar Ratio Rank: 100
PAIPX Martin Ratio Rank: 100

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.

BUBSX vs. PAIPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Baird Ultra Short Bond Fund (BUBSX) and PIMCO Short Asset Investment Fund (PAIPX). 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.

	BUBSX	PAIPX	Difference
Sharpe ratio Return per unit of total volatility	6.62	3.93	+2.69
Sortino ratio Return per unit of downside risk	23.03	26.36	-3.33
Omega ratio Gain probability vs. loss probability	12.11	16.16	-4.04
Calmar ratio Return relative to maximum drawdown	41.98	46.81	-4.83
Martin ratio Return relative to average drawdown	305.78	185.02	+120.76
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BUBSX vs. PAIPX - Sharpe Ratio Comparison

The current BUBSX Sharpe Ratio is 6.62, which is higher than the PAIPX Sharpe Ratio of 3.93. The chart below compares the historical Sharpe Ratios of BUBSX and PAIPX, 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

	BUBSX	PAIPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	6.62	3.93	+2.69
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	4.56	2.02	+2.53
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	3.59	1.87	+1.72
Sharpe Ratio (All Time) Calculated using the full available price history	3.16	1.75	+1.41

Drawdowns

BUBSX vs. PAIPX - Drawdown Comparison

The maximum BUBSX drawdown since its inception was -1.88%, smaller than the maximum PAIPX drawdown of -3.49%. Use the drawdown chart below to compare losses from any high point for BUBSX and PAIPX.

Drawdown Indicators

	BUBSX	PAIPX	Difference
Max Drawdown Largest peak-to-trough decline	-1.88%	-3.49%	+1.61%
Max Drawdown (1Y) Largest decline over 1 year	-0.10%	-0.10%	0.00%
Max Drawdown (3Y) Largest decline over 3 years	-0.29%	-1.20%	+0.91%
Max Drawdown (5Y) Largest decline over 5 years	-0.83%	-1.64%	+0.81%
Max Drawdown (10Y) Largest decline over 10 years	-1.88%	-3.49%	+1.61%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.07%	-0.15%	+0.08%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	0.03%	-0.02%

Volatility

BUBSX vs. PAIPX - Volatility Comparison

The current volatility for Baird Ultra Short Bond Fund (BUBSX) is 0.16%, while PIMCO Short Asset Investment Fund (PAIPX) has a volatility of 0.32%. This indicates that BUBSX experiences smaller price fluctuations and is considered to be less risky than PAIPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BUBSX	PAIPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.16%	0.32%	-0.16%
Volatility (6M) Calculated over the trailing 6-month period	0.43%	0.85%	-0.42%
Volatility (1Y) Calculated over the trailing 1-year period	0.62%	1.19%	-0.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.76%	1.67%	-0.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.70%	1.35%	-0.65%

BUBSX vs. PAIPX - Expense Ratio Comparison

BUBSX has a 0.40% expense ratio, which is lower than PAIPX's 0.45% expense ratio.

Dividends

BUBSX vs. PAIPX - Dividend Comparison

BUBSX's dividend yield for the trailing twelve months is around 4.04%, more than PAIPX's 3.93% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BUBSX Baird Ultra Short Bond Fund	4.04%	4.24%	5.04%	4.39%	1.29%	0.25%	1.14%	2.33%	1.90%	1.04%	0.81%	0.56%
PAIPX PIMCO Short Asset Investment Fund	3.93%	4.29%	5.04%	4.04%	1.21%	0.31%	1.00%	2.53%	2.28%	1.81%	1.21%	0.78%

Frequently Asked Questions

Can I hold both BUBSX and PAIPX in my portfolio?

BUBSX and PAIPX have a correlation of 0.12, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BUBSX or PAIPX?

PAIPX has higher volatility (0.32%) compared to BUBSX (0.16%). In terms of maximum drawdown, BUBSX dropped -1.88% vs PAIPX's -3.49%.

Which has better risk-adjusted returns?

BUBSX currently has the higher Sharpe Ratio (6.62 vs 3.93), 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.