XILSX vs. OSTIX

Last updated Jun 4, 2026

XILSX (Pioneer ILS Interval Fund) and OSTIX (Osterweis Strategic Income Fund) are both High Yield Bonds funds. Over the past 5 years, XILSX returned 12.34%/yr vs 4.41%/yr for OSTIX. At a correlation of -0.01, they often move in opposite directions. XILSX charges 1.88%/yr vs 0.84%/yr for OSTIX.

Performance

XILSX vs. OSTIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Pioneer ILS Interval Fund (XILSX) and Osterweis Strategic Income Fund (OSTIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, XILSX achieves a 7.97% return, which is significantly higher than OSTIX's 1.67% return.

XILSX

• 1D: 0.00%
• 1M: 0.97%
• YTD: 7.97%
• 6M: 10.49%
• 1Y: 24.81%
• 3Y*: 19.66%
• 5Y*: 12.34%
• 10Y*: —

OSTIX

• 1D: 0.00%
• 1M: 0.92%
• YTD: 1.67%
• 6M: 2.19%
• 1Y: 5.13%
• 3Y*: 7.26%
• 5Y*: 4.41%
• 10Y*: 5.13%

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

XILSX vs. OSTIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
XILSX Pioneer ILS Interval Fund	7.97%	18.70%	18.93%	18.65%	1.23%	-1.10%	7.37%	2.60%	-2.11%	-8.83%
OSTIX Osterweis Strategic Income Fund	1.67%	4.04%	8.03%	12.29%	-5.94%	5.48%	9.01%	5.36%	-0.66%	4.97%

Correlation

The correlation between XILSX and OSTIX is -0.10, 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	-0.10
Correlation (3Y) Calculated over the trailing 3-year period	-0.04
Correlation (5Y) Calculated over the trailing 5-year period	-0.02
Correlation (All Time) Calculated using the full available price history since Feb 2, 2017	-0.01

Return for Risk

XILSX vs. OSTIX — Risk / Return Rank

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

XILSX

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

OSTIX

OSTIX Risk / Return Rank: 89
OSTIX Sharpe Ratio Rank: 92
OSTIX Sortino Ratio Rank: 93
OSTIX Omega Ratio Rank: 95
OSTIX Calmar Ratio Rank: 81
OSTIX Martin Ratio Rank: 87

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.

XILSX vs. OSTIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Pioneer ILS Interval Fund (XILSX) and Osterweis Strategic Income Fund (OSTIX). 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.

	XILSX	OSTIX	Difference
Sharpe ratio Return per unit of total volatility	8.17	3.10	+5.07
Sortino ratio Return per unit of downside risk	81.24	4.63	+76.60
Omega ratio Gain probability vs. loss probability	43.21	1.75	+41.46
Calmar ratio Return relative to maximum drawdown	117.99	3.70	+114.29
Martin ratio Return relative to average drawdown	805.46	16.77	+788.69
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

XILSX vs. OSTIX - Sharpe Ratio Comparison

The current XILSX Sharpe Ratio is 8.17, which is higher than the OSTIX Sharpe Ratio of 3.10. The chart below compares the historical Sharpe Ratios of XILSX and OSTIX, 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

	XILSX	OSTIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	8.17	3.10	+5.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	3.29	1.47	+1.82
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	1.74	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.63	2.35	-0.72

Drawdowns

XILSX vs. OSTIX - Drawdown Comparison

The maximum XILSX drawdown since its inception was -14.53%, which is greater than OSTIX's maximum drawdown of -10.06%. Use the drawdown chart below to compare losses from any high point for XILSX and OSTIX.

Drawdown Indicators

	XILSX	OSTIX	Difference
Max Drawdown Largest peak-to-trough decline	-14.53%	-10.06%	-4.47%
Max Drawdown (1Y) Largest decline over 1 year	-0.21%	-1.42%	+1.21%
Max Drawdown (3Y) Largest decline over 3 years	-2.36%	-3.27%	+0.91%
Max Drawdown (5Y) Largest decline over 5 years	-6.27%	-9.75%	+3.48%
Max Drawdown (10Y) Largest decline over 10 years	—	-10.06%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-4.91%	-0.94%	-3.97%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.03%	0.31%	-0.28%

Volatility

XILSX vs. OSTIX - Volatility Comparison

The current volatility for Pioneer ILS Interval Fund (XILSX) is 0.43%, while Osterweis Strategic Income Fund (OSTIX) has a volatility of 0.52%. This indicates that XILSX experiences smaller price fluctuations and is considered to be less risky than OSTIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	XILSX	OSTIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.43%	0.52%	-0.09%
Volatility (6M) Calculated over the trailing 6-month period	2.11%	1.34%	+0.77%
Volatility (1Y) Calculated over the trailing 1-year period	3.08%	1.69%	+1.39%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.77%	3.01%	+0.76%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.93%	2.96%	+0.97%

XILSX vs. OSTIX - Expense Ratio Comparison

XILSX has a 1.88% expense ratio, which is higher than OSTIX's 0.84% expense ratio.

Dividends

XILSX vs. OSTIX - Dividend Comparison

XILSX's dividend yield for the trailing twelve months is around 8.81%, more than OSTIX's 4.75% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
OSTIX Osterweis Strategic Income Fund	4.75%	3.96%	5.25%	5.72%	4.72%	4.03%	3.85%	4.74%	4.66%	4.58%	5.23%	5.98%
XILSX Pioneer ILS Interval Fund	8.81%	9.51%	13.06%	12.82%	2.68%	2.04%	5.20%	6.63%	6.40%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both XILSX and OSTIX in my portfolio?

XILSX and OSTIX have a correlation of -0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, XILSX or OSTIX?

OSTIX has higher volatility (0.52%) compared to XILSX (0.43%). In terms of maximum drawdown, XILSX dropped -14.53% vs OSTIX's -10.06%.

Which has better risk-adjusted returns?

XILSX currently has the higher Sharpe Ratio (8.17 vs 3.10), 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.