IPMIX vs. THPMX

Last updated Aug 1, 2026

IPMIX (Voya Index Plus MidCap Portfolio) and THPMX (Thompson MidCap Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, IPMIX returned 10.26%/yr vs 11.04%/yr for THPMX. Their correlation of 0.93 means they have usually moved in the same direction. IPMIX charges 0.60%/yr vs 1.15%/yr for THPMX.

Performance

IPMIX vs. THPMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Index Plus MidCap Portfolio (IPMIX) and Thompson MidCap Fund (THPMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IPMIX achieves a 15.43% return, which is significantly lower than THPMX's 16.70% return. Over the past 10 years, IPMIX has underperformed THPMX with an annualized return of 10.26%, while THPMX has yielded a comparatively higher 11.04% annualized return.

IPMIX

• 1D: 1.10%
• 1M: 0.04%
• 6M: 11.79%
• YTD: 15.43%
• 1Y: 23.10%
• 3Y*: 14.16%
• 5Y*: 8.95%
• 10Y*: 10.26%
• ALL TIME*: 9.91%

THPMX

• 1D: -0.41%
• 1M: 0.35%
• 6M: 13.92%
• YTD: 16.70%
• 1Y: 34.90%
• 3Y*: 15.14%
• 5Y*: 9.32%
• 10Y*: 11.04%
• ALL TIME*: 13.08%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
IPMIX Voya Index Plus MidCap Portfolio	$0.00	$0.00	$0.00
THPMX Thompson MidCap Fund	$0.00	$0.00	$0.00

IPMIX vs. THPMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IPMIX Voya Index Plus MidCap Portfolio	15.43%	8.27%	15.17%	17.49%	-14.10%	27.70%	8.18%	26.62%	-14.34%	13.66%
THPMX Thompson MidCap Fund	16.70%	20.08%	7.70%	17.01%	-14.84%	29.71%	11.97%	33.48%	-21.90%	17.10%

Correlation

The correlation between IPMIX and THPMX is 0.77, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.77
Correlation (3Y) Balances recent behavior with more history.	0.82
Correlation (5Y) Shows whether the relationship held over a longer period.	0.90
Correlation (10Y) Provides a long-term view across more market conditions.	0.91
Correlation (All Time) Calculated using the full available price history since Jan 2, 2009	0.93

The correlation between IPMIX and THPMX shifts across timeframes, from 0.77 (1 year) to 0.93 (all time), reflecting how their relationship changes across market environments.

Return for Risk

IPMIX vs. THPMX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

IPMIX

IPMIX Risk / Return Rank: 41
IPMIX Sharpe Ratio Rank: 36
IPMIX Sortino Ratio Rank: 36
IPMIX Omega Ratio Rank: 50
IPMIX Calmar Ratio Rank: 49
IPMIX Martin Ratio Rank: 35

THPMX

THPMX Risk / Return Rank: 84
THPMX Sharpe Ratio Rank: 84
THPMX Sortino Ratio Rank: 82
THPMX Omega Ratio Rank: 78
THPMX Calmar Ratio Rank: 88
THPMX Martin Ratio Rank: 88

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

IPMIX vs. THPMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Index Plus MidCap Portfolio (IPMIX) and Thompson MidCap Fund (THPMX). 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.

	IPMIX	THPMX	Difference
Sharpe ratio: Return per unit of total volatility	1.15	2.06	-0.92
Sortino ratio: Return per unit of downside risk	1.66	2.93	-1.27
Omega ratio: Gain probability vs. loss probability	1.25	1.36	-0.11
Calmar ratio: Return relative to maximum drawdown	1.87	3.20	-1.33
Martin ratio: Return relative to average drawdown	5.27	11.78	-6.51

IPMIX vs. THPMX - Sharpe Ratio Comparison

The current IPMIX Sharpe Ratio is 1.15, which is lower than the THPMX Sharpe Ratio of 2.06. The chart below compares the historical Sharpe Ratios of IPMIX and THPMX, 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

IPMIX vs. THPMX - Drawdown Comparison

The maximum IPMIX drawdown since its inception was -54.71%, which is greater than THPMX's maximum drawdown of -47.55%. Use the drawdown chart below to compare losses from any high point for IPMIX and THPMX.

Drawdown Indicators

	IPMIX	THPMX	Difference
Max Drawdown Largest peak-to-trough decline	-54.71%	-47.55%	-7.16%
Max Drawdown (1Y) Largest decline over 1 year	-12.67%	-9.90%	-2.77%
Max Drawdown (3Y) Largest decline over 3 years	-23.97%	-21.52%	-2.45%
Max Drawdown (5Y) Largest decline over 5 years	-24.28%	-25.29%	+1.01%
Max Drawdown (10Y) Largest decline over 10 years	-43.76%	-47.55%	+3.79%
Current Drawdown Current decline from peak	-6.50%	-1.43%	-5.07%
Average Drawdown Average peak-to-trough decline	-10.14%	-6.71%	-3.43%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.34%	2.69%	+1.65%

Volatility

IPMIX vs. THPMX - Volatility Comparison

The current volatility for Voya Index Plus MidCap Portfolio (IPMIX) is 3.62%, while Thompson MidCap Fund (THPMX) has a volatility of 3.92%. This indicates that IPMIX experiences smaller price fluctuations and is considered to be less risky than THPMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IPMIX	THPMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.62%	3.92%	-0.30%
Volatility (6M) Calculated over the trailing 6-month period	17.60%	11.35%	+6.25%
Volatility (1Y) Calculated over the trailing 1-year period	20.63%	15.38%	+5.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.23%	20.47%	+0.76%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.03%	22.65%	-0.62%

IPMIX vs. THPMX - Expense Ratio Comparison

IPMIX has a 0.60% expense ratio, which is lower than THPMX's 1.15% expense ratio.

Dividends

IPMIX vs. THPMX - Dividend Comparison

IPMIX's dividend yield for the trailing twelve months is around 6.54%, less than THPMX's 8.13% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IPMIX Voya Index Plus MidCap Portfolio	6.54%	7.59%	4.15%	4.66%	29.03%	1.13%	1.20%	10.96%	16.62%	7.62%	10.43%	17.41%
THPMX Thompson MidCap Fund	8.13%	9.48%	8.04%	7.60%	12.04%	9.76%	0.33%	2.93%	7.29%	7.51%	4.84%	9.46%

Frequently Asked Questions

Can I hold both IPMIX and THPMX in my portfolio?

IPMIX and THPMX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IPMIX or THPMX?

THPMX has higher volatility (3.92%) compared to IPMIX (3.62%). In terms of maximum drawdown, IPMIX dropped -54.71% vs THPMX's -47.55%.

Which has better risk-adjusted returns?

THPMX currently has the higher Sharpe Ratio (2.06 vs 1.15), 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.