ENIAX vs. PAIPX

Last updated Jun 4, 2026

ENIAX (SEI Institutional Investments Trust Opportunistic Income Fund) and PAIPX (PIMCO Short Asset Investment Fund) are both Ultrashort Bond funds. Over the past 10 years, ENIAX returned 4.17%/yr vs 2.51%/yr for PAIPX. At a 0.09 correlation, their price movements are largely independent. ENIAX charges 0.23%/yr vs 0.45%/yr for PAIPX.

Performance

ENIAX vs. PAIPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX) 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, ENIAX achieves a 1.52% return, which is significantly lower than PAIPX's 1.80% return. Over the past 10 years, ENIAX has outperformed PAIPX with an annualized return of 4.17%, while PAIPX has yielded a comparatively lower 2.51% annualized return.

ENIAX

• 1D: 0.00%
• 1M: 0.38%
• YTD: 1.52%
• 6M: 1.93%
• 1Y: 5.28%
• 3Y*: 6.69%
• 5Y*: 4.69%
• 10Y*: 4.17%

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)

ENIAX vs. PAIPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ENIAX SEI Institutional Investments Trust Opportunistic Income Fund	1.52%	6.14%	8.34%	7.94%	-1.16%	2.67%	2.47%	5.82%	1.82%	3.93%
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 ENIAX and PAIPX is -0.14, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.14
Correlation (3Y) Calculated over the trailing 3-year period	-0.02
Correlation (5Y) Calculated over the trailing 5-year period	0.04
Correlation (10Y) Calculated over the trailing 10-year period	0.10
Correlation (All Time) Calculated using the full available price history since Jun 4, 2012	0.09

The correlation between ENIAX and PAIPX shifts across timeframes, from -0.14 (1 year) to 0.10 (10 years), reflecting how their relationship changes across market environments.

Return for Risk

ENIAX vs. PAIPX — Risk / Return Rank

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

ENIAX

ENIAX Risk / Return Rank: 100
ENIAX Sharpe Ratio Rank: 100
ENIAX Sortino Ratio Rank: 100
ENIAX Omega Ratio Rank: 99
ENIAX Calmar Ratio Rank: 99
ENIAX 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.

ENIAX vs. PAIPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX) 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.

	ENIAX	PAIPX	Difference
Sharpe ratio: Return per unit of total volatility	5.58	3.93	+1.65
Sortino ratio: Return per unit of downside risk	11.95	26.36	-14.40
Omega ratio: Gain probability vs. loss probability	4.44	16.16	-11.71
Calmar ratio: Return relative to maximum drawdown	14.18	46.81	-32.63
Martin ratio: Return relative to average drawdown	87.74	185.02	-97.29
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ENIAX vs. PAIPX - Sharpe Ratio Comparison

The current ENIAX Sharpe Ratio is 5.58, which is higher than the PAIPX Sharpe Ratio of 3.93. The chart below compares the historical Sharpe Ratios of ENIAX 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

	ENIAX	PAIPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	5.58	3.93	+1.65
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.65	2.02	-0.37
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.50	1.87	-0.37
Sharpe Ratio (All Time) Calculated using the full available price history	0.67	1.75	-1.08

Drawdowns

ENIAX vs. PAIPX - Drawdown Comparison

The maximum ENIAX drawdown since its inception was -33.30%, which is greater than PAIPX's maximum drawdown of -3.49%. Use the drawdown chart below to compare losses from any high point for ENIAX and PAIPX.

Drawdown Indicators

	ENIAX	PAIPX	Difference
Max Drawdown Largest peak-to-trough decline	-33.30%	-3.49%	-29.81%
Max Drawdown (1Y) Largest decline over 1 year	-0.37%	-0.10%	-0.27%
Max Drawdown (3Y) Largest decline over 3 years	-2.11%	-1.20%	-0.91%
Max Drawdown (5Y) Largest decline over 5 years	-3.52%	-1.64%	-1.88%
Max Drawdown (10Y) Largest decline over 10 years	-13.45%	-3.49%	-9.96%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-7.79%	-0.15%	-7.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.06%	0.03%	+0.03%

Volatility

ENIAX vs. PAIPX - Volatility Comparison

The current volatility for SEI Institutional Investments Trust Opportunistic Income Fund (ENIAX) is 0.23%, while PIMCO Short Asset Investment Fund (PAIPX) has a volatility of 0.32%. This indicates that ENIAX 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

	ENIAX	PAIPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.23%	0.32%	-0.09%
Volatility (6M) Calculated over the trailing 6-month period	0.69%	0.85%	-0.16%
Volatility (1Y) Calculated over the trailing 1-year period	0.95%	1.19%	-0.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.86%	1.67%	+1.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.79%	1.35%	+1.44%

ENIAX vs. PAIPX - Expense Ratio Comparison

ENIAX has a 0.23% expense ratio, which is lower than PAIPX's 0.45% expense ratio.

Dividends

ENIAX vs. PAIPX - Dividend Comparison

ENIAX's dividend yield for the trailing twelve months is around 5.93%, more than PAIPX's 3.93% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ENIAX SEI Institutional Investments Trust Opportunistic Income Fund	5.93%	6.00%	6.78%	5.33%	4.07%	2.66%	2.96%	4.32%	3.96%	3.02%	2.75%	2.54%
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 ENIAX and PAIPX in my portfolio?

ENIAX and PAIPX have a correlation of -0.14, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ENIAX or PAIPX?

PAIPX has higher volatility (0.32%) compared to ENIAX (0.23%). In terms of maximum drawdown, ENIAX dropped -33.30% vs PAIPX's -3.49%.

Which has better risk-adjusted returns?

ENIAX currently has the higher Sharpe Ratio (5.58 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.