PTSHX vs. PAIPX

Last updated Jun 26, 2026

PTSHX (PIMCO Short Term Fund) and PAIPX (PIMCO Short Asset Investment Fund) are both Ultrashort Bond funds from PIMCO. Over the past 10 years, PTSHX returned 3.01%/yr vs 2.53%/yr for PAIPX. At a 0.36 correlation, their price movements are largely independent. Both charge a 0.45% expense ratio.

Performance

PTSHX vs. PAIPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO Short Term Fund (PTSHX) 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, PTSHX achieves a 2.03% return, which is significantly higher than PAIPX's 1.91% return. Over the past 10 years, PTSHX has outperformed PAIPX with an annualized return of 3.01%, while PAIPX has yielded a comparatively lower 2.53% annualized return.

PTSHX

• 1D: 0.00%
• 1M: 0.46%
• YTD: 2.03%
• 6M: 2.42%
• 1Y: 5.09%
• 3Y*: 5.69%
• 5Y*: 3.69%
• 10Y*: 3.01%

PAIPX

• 1D: 0.10%
• 1M: 0.41%
• YTD: 1.91%
• 6M: 2.25%
• 1Y: 4.76%
• 3Y*: 5.16%
• 5Y*: 3.38%
• 10Y*: 2.53%

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

PTSHX vs. PAIPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PTSHX PIMCO Short Term Fund	2.03%	4.88%	6.43%	6.09%	-0.55%	0.02%	2.75%	2.74%	1.51%	2.43%
PAIPX PIMCO Short Asset Investment Fund	1.91%	4.83%	5.93%	4.55%	-0.00%	-0.19%	1.12%	2.56%	1.90%	1.82%

Correlation

The correlation between PTSHX and PAIPX is 0.42, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.42
Correlation (3Y) Calculated over the trailing 3-year period	0.34
Correlation (5Y) Calculated over the trailing 5-year period	0.38
Correlation (10Y) Calculated over the trailing 10-year period	0.40
Correlation (All Time) Calculated using the full available price history since Jun 1, 2012	0.36

Return for Risk

PTSHX vs. PAIPX — Risk / Return Rank

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

PTSHX

PTSHX Risk / Return Rank: 99
PTSHX Sharpe Ratio Rank: 98
PTSHX Sortino Ratio Rank: 100
PTSHX Omega Ratio Rank: 99
PTSHX Calmar Ratio Rank: 100
PTSHX Martin Ratio Rank: 100

PAIPX

PAIPX Risk / Return Rank: 100
PAIPX Sharpe Ratio Rank: 99
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.

PTSHX vs. PAIPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO Short Term Fund (PTSHX) 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.

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.

	PTSHX	PAIPX	Difference
Sharpe ratio: Return per unit of total volatility	3.56	4.01	-0.46
Sortino ratio: Return per unit of downside risk	12.09	26.93	-14.84
Omega ratio: Gain probability vs. loss probability	4.01	16.49	-12.48
Calmar ratio: Return relative to maximum drawdown	24.86	47.86	-23.00
Martin ratio: Return relative to average drawdown	81.06	189.18	-108.12

PTSHX vs. PAIPX - Sharpe Ratio Comparison

The current PTSHX Sharpe Ratio is 3.56, which is comparable to the PAIPX Sharpe Ratio of 4.01. The chart below compares the historical Sharpe Ratios of PTSHX 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.

Drawdowns

PTSHX vs. PAIPX - Drawdown Comparison

The maximum PTSHX drawdown since its inception was -5.12%, which is greater than PAIPX's maximum drawdown of -3.49%. Use the drawdown chart below to compare losses from any high point for PTSHX and PAIPX.

Drawdown Indicators

	PTSHX	PAIPX	Difference
Max Drawdown Largest peak-to-trough decline	-5.12%	-3.49%	-1.63%
Max Drawdown (1Y) Largest decline over 1 year	-0.21%	-0.10%	-0.11%
Max Drawdown (3Y) Largest decline over 3 years	-0.41%	-1.20%	+0.79%
Max Drawdown (5Y) Largest decline over 5 years	-2.33%	-1.64%	-0.69%
Max Drawdown (10Y) Largest decline over 10 years	-4.79%	-3.49%	-1.30%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.19%	-0.15%	-0.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.06%	0.03%	+0.03%

Volatility

PTSHX vs. PAIPX - Volatility Comparison

PIMCO Short Term Fund (PTSHX) has a higher volatility of 0.42% compared to PIMCO Short Asset Investment Fund (PAIPX) at 0.32%. This indicates that PTSHX's price experiences larger fluctuations and is considered to be riskier than PAIPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PTSHX	PAIPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.42%	0.32%	+0.10%
Volatility (6M) Calculated over the trailing 6-month period	0.97%	0.80%	+0.17%
Volatility (1Y) Calculated over the trailing 1-year period	1.44%	1.19%	+0.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.40%	1.67%	-0.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.34%	1.35%	-0.01%

PTSHX vs. PAIPX - Expense Ratio Comparison

Both PTSHX and PAIPX have an expense ratio of 0.45%.

Dividends

PTSHX vs. PAIPX - Dividend Comparison

PTSHX's dividend yield for the trailing twelve months is around 4.43%, more than PAIPX's 3.92% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PAIPX PIMCO Short Asset Investment Fund	3.92%	4.29%	5.04%	4.04%	1.21%	0.31%	1.00%	2.53%	2.28%	1.81%	1.21%	0.78%
PTSHX PIMCO Short Term Fund	4.43%	4.75%	5.16%	4.51%	2.80%	0.63%	1.78%	2.92%	2.65%	1.69%	1.67%	1.57%

Frequently Asked Questions

Can I hold both PTSHX and PAIPX in my portfolio?

PTSHX and PAIPX have a correlation of 0.42, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PTSHX or PAIPX?

PTSHX has higher volatility (0.42%) compared to PAIPX (0.32%). In terms of maximum drawdown, PTSHX dropped -5.12% vs PAIPX's -3.49%.

Which has better risk-adjusted returns?

PAIPX currently has the higher Sharpe Ratio (4.01 vs 3.56), 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.