SIHY vs. PTY

Last updated Jun 14, 2026

SIHY (Harbor Scientific Alpha High-Yield ETF) and PTY (PIMCO Corporate & Income Opportunity Fund) are both funds - SIHY is a High Yield Bonds fund tracking the ICE BofA US High Yield, while PTY is a Corporate Bonds fund managed by PIMCO. Over the past 3 years, SIHY returned 9.46%/yr vs 7.73%/yr for PTY. At a 0.40 correlation, their price movements are largely independent. SIHY charges 0.48%/yr vs 1.19%/yr for PTY.

Performance

SIHY vs. PTY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Harbor Scientific Alpha High-Yield ETF (SIHY) and PIMCO Corporate & Income Opportunity Fund (PTY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SIHY achieves a 2.17% return, which is significantly higher than PTY's -3.70% return.

SIHY

• 1D: -0.09%
• 1M: 1.34%
• YTD: 2.17%
• 6M: 2.61%
• 1Y: 8.13%
• 3Y*: 9.46%
• 5Y*: —
• 10Y*: —

PTY

• 1D: 0.26%
• 1M: -0.51%
• YTD: -3.70%
• 6M: -3.85%
• 1Y: -4.11%
• 3Y*: 7.73%
• 5Y*: -0.75%
• 10Y*: 8.71%

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

SIHY vs. PTY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
SIHY Harbor Scientific Alpha High-Yield ETF	2.17%	8.13%	8.67%	13.31%	-7.73%	0.18%
PTY PIMCO Corporate & Income Opportunity Fund	-3.70%	-0.51%	19.87%	22.56%	-18.71%	-11.60%

Correlation

The correlation between SIHY and PTY is 0.29, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.29
Correlation (3Y) Calculated over the trailing 3-year period	0.30
Correlation (All Time) Calculated using the full available price history since Sep 16, 2021	0.40

The correlation between SIHY and PTY shifts across timeframes, from 0.29 (1 year) to 0.40 (all time), reflecting how their relationship changes across market environments.

Return for Risk

SIHY vs. PTY — Risk / Return Rank

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

SIHY

SIHY Risk / Return Rank: 66
SIHY Sharpe Ratio Rank: 65
SIHY Sortino Ratio Rank: 75
SIHY Omega Ratio Rank: 71
SIHY Calmar Ratio Rank: 57
SIHY Martin Ratio Rank: 64

PTY

PTY Risk / Return Rank: 2
PTY Sharpe Ratio Rank: 2
PTY Sortino Ratio Rank: 2
PTY Omega Ratio Rank: 1
PTY Calmar Ratio Rank: 2
PTY Martin Ratio Rank: 2

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.

SIHY vs. PTY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Harbor Scientific Alpha High-Yield ETF (SIHY) and PIMCO Corporate & Income Opportunity Fund (PTY). 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.

	SIHY	PTY	Difference
Sharpe ratio: Return per unit of total volatility	1.90	-0.42	+2.32
Sortino ratio: Return per unit of downside risk	2.96	-0.50	+3.46
Omega ratio: Gain probability vs. loss probability	1.37	0.92	+0.44
Calmar ratio: Return relative to maximum drawdown	2.51	-0.29	+2.80
Martin ratio: Return relative to average drawdown	10.38	-0.57	+10.95

SIHY vs. PTY - Sharpe Ratio Comparison

The current SIHY Sharpe Ratio is 1.90, which is higher than the PTY Sharpe Ratio of -0.42. The chart below compares the historical Sharpe Ratios of SIHY and PTY, 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

SIHY vs. PTY - Drawdown Comparison

The maximum SIHY drawdown since its inception was -13.30%, smaller than the maximum PTY drawdown of -60.86%. Use the drawdown chart below to compare losses from any high point for SIHY and PTY.

Drawdown Indicators

	SIHY	PTY	Difference
Max Drawdown Largest peak-to-trough decline	-13.30%	-60.86%	+47.56%
Max Drawdown (1Y) Largest decline over 1 year	-3.17%	-15.44%	+12.27%
Max Drawdown (3Y) Largest decline over 3 years	-5.36%	-16.04%	+10.68%
Max Drawdown (5Y) Largest decline over 5 years	—	-41.38%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-46.55%	—
Current Drawdown Current decline from peak	-0.09%	-12.60%	+12.51%
Average Drawdown Average peak-to-trough decline	-2.76%	-8.61%	+5.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.76%	7.89%	-7.13%

Volatility

SIHY vs. PTY - Volatility Comparison

The current volatility for Harbor Scientific Alpha High-Yield ETF (SIHY) is 1.19%, while PIMCO Corporate & Income Opportunity Fund (PTY) has a volatility of 2.64%. This indicates that SIHY experiences smaller price fluctuations and is considered to be less risky than PTY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SIHY	PTY	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.19%	2.64%	-1.45%
Volatility (6M) Calculated over the trailing 6-month period	3.12%	7.49%	-4.37%
Volatility (1Y) Calculated over the trailing 1-year period	4.18%	10.80%	-6.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.56%	17.39%	-9.83%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.56%	21.19%	-13.63%

SIHY vs. PTY - Expense Ratio Comparison

SIHY has a 0.48% expense ratio, which is lower than PTY's 1.19% expense ratio.

Dividends

SIHY vs. PTY - Dividend Comparison

SIHY's dividend yield for the trailing twelve months is around 7.23%, less than PTY's 12.15% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PTY PIMCO Corporate & Income Opportunity Fund	12.15%	11.05%	9.92%	10.77%	13.12%	9.16%	8.74%	8.37%	10.63%	9.48%	12.09%	11.92%
SIHY Harbor Scientific Alpha High-Yield ETF	7.23%	7.61%	7.54%	7.06%	6.31%	1.30%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both SIHY and PTY in my portfolio?

SIHY and PTY have a correlation of 0.29, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SIHY or PTY?

PTY has higher volatility (2.64%) compared to SIHY (1.19%). In terms of maximum drawdown, SIHY dropped -13.30% vs PTY's -60.86%.

Which has better risk-adjusted returns?

SIHY currently has the higher Sharpe Ratio (1.90 vs -0.42), 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.