IISBX vs. IPHYX

Last updated Jun 5, 2026

IISBX (Voya Short Term Bond Fund) and IPHYX (Voya High Yield Portfolio) are both mutual funds - IISBX is a Short-Term Bond fund managed by Voya, while IPHYX is a High Yield Bonds fund managed by Voya. Over the past 10 years, IISBX returned 2.03%/yr vs 4.50%/yr for IPHYX. At a 0.35 correlation, their price movements are largely independent. IISBX charges 0.35%/yr vs 0.73%/yr for IPHYX.

Performance

IISBX vs. IPHYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Short Term Bond Fund (IISBX) and Voya High Yield Portfolio (IPHYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IISBX achieves a 0.66% return, which is significantly lower than IPHYX's 1.06% return. Over the past 10 years, IISBX has underperformed IPHYX with an annualized return of 2.03%, while IPHYX has yielded a comparatively higher 4.50% annualized return.

IISBX

• 1D: 0.00%
• 1M: 0.16%
• YTD: 0.66%
• 6M: 1.16%
• 1Y: 3.30%
• 3Y*: 4.36%
• 5Y*: 1.71%
• 10Y*: 2.03%

IPHYX

• 1D: -0.23%
• 1M: 0.47%
• YTD: 1.06%
• 6M: 1.64%
• 1Y: 5.00%
• 3Y*: 7.13%
• 5Y*: 2.62%
• 10Y*: 4.50%

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

IISBX vs. IPHYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IISBX Voya Short Term Bond Fund	0.66%	4.66%	4.88%	4.38%	-5.30%	0.13%	3.66%	4.68%	1.00%	1.54%
IPHYX Voya High Yield Portfolio	1.06%	6.80%	6.74%	11.47%	-13.75%	4.15%	5.66%	15.24%	-3.18%	6.24%

Correlation

The correlation between IISBX and IPHYX is 0.60, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.60
Correlation (3Y) Calculated over the trailing 3-year period	0.52
Correlation (5Y) Calculated over the trailing 5-year period	0.47
Correlation (10Y) Calculated over the trailing 10-year period	0.38
Correlation (All Time) Calculated using the full available price history since Jan 3, 2013	0.35

Over the past year, IISBX and IPHYX have become more correlated (0.60) than their long-term average of 0.35, meaning their price movements have been converging.

Return for Risk

IISBX vs. IPHYX — Risk / Return Rank

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

IISBX

IISBX Risk / Return Rank: 53
IISBX Sharpe Ratio Rank: 40
IISBX Sortino Ratio Rank: 63
IISBX Omega Ratio Rank: 60
IISBX Calmar Ratio Rank: 54
IISBX Martin Ratio Rank: 50

IPHYX

IPHYX Risk / Return Rank: 41
IPHYX Sharpe Ratio Rank: 33
IPHYX Sortino Ratio Rank: 45
IPHYX Omega Ratio Rank: 43
IPHYX Calmar Ratio Rank: 35
IPHYX Martin Ratio Rank: 51

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.

IISBX vs. IPHYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Short Term Bond Fund (IISBX) and Voya High Yield Portfolio (IPHYX). 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.

	IISBX	IPHYX	Difference
Sharpe ratio: Return per unit of total volatility	1.77	1.64	+0.14
Sortino ratio: Return per unit of downside risk	3.24	2.79	+0.45
Omega ratio: Gain probability vs. loss probability	1.42	1.35	+0.07
Calmar ratio: Return relative to maximum drawdown	2.75	2.18	+0.57
Martin ratio: Return relative to average drawdown	9.94	10.28	-0.34
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IISBX vs. IPHYX - Sharpe Ratio Comparison

The current IISBX Sharpe Ratio is 1.77, which is comparable to the IPHYX Sharpe Ratio of 1.64. The chart below compares the historical Sharpe Ratios of IISBX and IPHYX, 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

	IISBX	IPHYX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.77	1.64	+0.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.71	0.52	+0.20
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.92	0.83	+0.09
Sharpe Ratio (All Time) Calculated using the full available price history	0.94	1.03	-0.09

Drawdowns

IISBX vs. IPHYX - Drawdown Comparison

The maximum IISBX drawdown since its inception was -8.22%, smaller than the maximum IPHYX drawdown of -32.43%. Use the drawdown chart below to compare losses from any high point for IISBX and IPHYX.

Drawdown Indicators

	IISBX	IPHYX	Difference
Max Drawdown Largest peak-to-trough decline	-8.22%	-32.43%	+24.21%
Max Drawdown (1Y) Largest decline over 1 year	-1.38%	-2.62%	+1.24%
Max Drawdown (3Y) Largest decline over 3 years	-1.38%	-3.81%	+2.43%
Max Drawdown (5Y) Largest decline over 5 years	-7.40%	-17.18%	+9.78%
Max Drawdown (10Y) Largest decline over 10 years	-8.22%	-20.45%	+12.23%
Current Drawdown Current decline from peak	-0.26%	-0.34%	+0.08%
Average Drawdown Average peak-to-trough decline	-0.89%	-2.79%	+1.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.37%	0.53%	-0.16%

Volatility

IISBX vs. IPHYX - Volatility Comparison

The current volatility for Voya Short Term Bond Fund (IISBX) is 0.81%, while Voya High Yield Portfolio (IPHYX) has a volatility of 1.05%. This indicates that IISBX experiences smaller price fluctuations and is considered to be less risky than IPHYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IISBX	IPHYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.81%	1.05%	-0.24%
Volatility (6M) Calculated over the trailing 6-month period	1.63%	2.77%	-1.14%
Volatility (1Y) Calculated over the trailing 1-year period	2.14%	3.50%	-1.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.45%	5.21%	-2.76%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.25%	5.52%	-3.27%

IISBX vs. IPHYX - Expense Ratio Comparison

IISBX has a 0.35% expense ratio, which is lower than IPHYX's 0.73% expense ratio.

Dividends

IISBX vs. IPHYX - Dividend Comparison

IISBX's dividend yield for the trailing twelve months is around 3.80%, less than IPHYX's 4.77% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IISBX Voya Short Term Bond Fund	3.80%	3.46%	4.75%	2.96%	1.61%	1.35%	2.25%	2.40%	2.54%	1.84%	1.90%	1.88%
IPHYX Voya High Yield Portfolio	4.77%	4.47%	5.90%	5.68%	4.36%	4.26%	5.03%	5.14%	6.03%	6.82%	6.44%	6.32%

Frequently Asked Questions

Can I hold both IISBX and IPHYX in my portfolio?

IISBX and IPHYX have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IISBX or IPHYX?

IPHYX has higher volatility (1.05%) compared to IISBX (0.81%). In terms of maximum drawdown, IISBX dropped -8.22% vs IPHYX's -32.43%.

Which has better risk-adjusted returns?

IISBX currently has the higher Sharpe Ratio (1.77 vs 1.64), 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.