NMPAX vs. VNVYX

Last updated Aug 4, 2026

NMPAX (Columbia Mid Cap Index Fund) and VNVYX (Natixis Funds Trust II Vaughan Nelson Mid Cap Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, NMPAX returned 10.37%/yr vs 10.92%/yr for VNVYX. Their correlation of 0.92 means they have usually moved in the same direction. NMPAX charges 0.20%/yr vs 0.90%/yr for VNVYX.

Performance

NMPAX vs. VNVYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Mid Cap Index Fund (NMPAX) and Natixis Funds Trust II Vaughan Nelson Mid Cap Fund (VNVYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with NMPAX having a 14.46% return and VNVYX slightly higher at 14.52%. Over the past 10 years, NMPAX has underperformed VNVYX with an annualized return of 10.37%, while VNVYX has yielded a comparatively higher 10.92% annualized return.

NMPAX

• 1D: -0.13%
• 1M: -1.14%
• 6M: 9.08%
• YTD: 14.46%
• 1Y: 22.53%
• 3Y*: 12.83%
• 5Y*: 8.30%
• 10Y*: 10.37%
• ALL TIME*: 9.52%

VNVYX

• 1D: 0.52%
• 1M: -3.87%
• 6M: 6.29%
• YTD: 14.52%
• 1Y: 20.49%
• 3Y*: 18.85%
• 5Y*: 10.74%
• 10Y*: 10.92%
• ALL TIME*: 11.95%

*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)
NMPAX Columbia Mid Cap Index Fund	$0.00	$0.00	$0.00
VNVYX Natixis Funds Trust II Vaughan Nelson Mid Cap Fund	$0.00	$0.00	$0.00

NMPAX vs. VNVYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NMPAX Columbia Mid Cap Index Fund	14.46%	7.23%	13.67%	16.32%	-13.27%	24.66%	8.71%	25.99%	-11.44%	15.84%
VNVYX Natixis Funds Trust II Vaughan Nelson Mid Cap Fund	14.52%	12.17%	19.45%	16.53%	-10.59%	21.82%	10.92%	30.53%	-15.98%	13.21%

Correlation

The correlation between NMPAX and VNVYX is 0.69, 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.	0.69
Correlation (3Y) Balances recent behavior with more history.	0.75
Correlation (5Y) Shows whether the relationship held over a longer period.	0.83
Correlation (10Y) Provides a long-term view across more market conditions.	0.88
Correlation (All Time) Calculated using the full available price history since Oct 31, 2008	0.92

Over the past year, the correlation between NMPAX and VNVYX has dropped to 0.69 - well below their long-term average of 0.92, suggesting their price drivers have been diverging.

Return for Risk

NMPAX vs. VNVYX — Risk / Return Rank

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

NMPAX

NMPAX Risk / Return Rank: 50
NMPAX Sharpe Ratio Rank: 41
NMPAX Sortino Ratio Rank: 43
NMPAX Omega Ratio Rank: 39
NMPAX Calmar Ratio Rank: 67
NMPAX Martin Ratio Rank: 61

VNVYX

VNVYX Risk / Return Rank: 37
VNVYX Sharpe Ratio Rank: 31
VNVYX Sortino Ratio Rank: 34
VNVYX Omega Ratio Rank: 30
VNVYX Calmar Ratio Rank: 49
VNVYX Martin Ratio Rank: 40

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.

NMPAX vs. VNVYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Mid Cap Index Fund (NMPAX) and Natixis Funds Trust II Vaughan Nelson Mid Cap Fund (VNVYX). 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.

	NMPAX	VNVYX	Difference
Sharpe ratio: Return per unit of total volatility	1.33	1.11	+0.22
Sortino ratio: Return per unit of downside risk	1.99	1.73	+0.26
Omega ratio: Gain probability vs. loss probability	1.24	1.20	+0.04
Calmar ratio: Return relative to maximum drawdown	2.36	1.98	+0.37
Martin ratio: Return relative to average drawdown	8.57	6.20	+2.37

NMPAX vs. VNVYX - Sharpe Ratio Comparison

The current NMPAX Sharpe Ratio is 1.33, which is comparable to the VNVYX Sharpe Ratio of 1.11. The chart below compares the historical Sharpe Ratios of NMPAX and VNVYX, 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

NMPAX vs. VNVYX - Drawdown Comparison

The maximum NMPAX drawdown since its inception was -54.31%, which is greater than VNVYX's maximum drawdown of -42.81%. Use the drawdown chart below to compare losses from any high point for NMPAX and VNVYX.

Drawdown Indicators

	NMPAX	VNVYX	Difference
Max Drawdown Largest peak-to-trough decline	-54.31%	-42.81%	-11.50%
Max Drawdown (1Y) Largest decline over 1 year	-8.84%	-12.19%	+3.35%
Max Drawdown (3Y) Largest decline over 3 years	-24.03%	-22.60%	-1.43%
Max Drawdown (5Y) Largest decline over 5 years	-24.03%	-22.60%	-1.43%
Max Drawdown (10Y) Largest decline over 10 years	-42.09%	-42.81%	+0.72%
Current Drawdown Current decline from peak	-2.39%	-8.58%	+6.19%
Average Drawdown Average peak-to-trough decline	-7.68%	-6.22%	-1.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.43%	3.63%	-1.20%

Volatility

NMPAX vs. VNVYX - Volatility Comparison

The current volatility for Columbia Mid Cap Index Fund (NMPAX) is 3.40%, while Natixis Funds Trust II Vaughan Nelson Mid Cap Fund (VNVYX) has a volatility of 5.87%. This indicates that NMPAX experiences smaller price fluctuations and is considered to be less risky than VNVYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NMPAX	VNVYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.40%	5.87%	-2.47%
Volatility (6M) Calculated over the trailing 6-month period	11.64%	16.60%	-4.96%
Volatility (1Y) Calculated over the trailing 1-year period	15.71%	21.80%	-6.09%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.64%	19.44%	+0.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.07%	20.77%	+0.30%

NMPAX vs. VNVYX - Expense Ratio Comparison

NMPAX has a 0.20% expense ratio, which is lower than VNVYX's 0.90% expense ratio.

Dividends

NMPAX vs. VNVYX - Dividend Comparison

NMPAX's dividend yield for the trailing twelve months is around 10.45%, less than VNVYX's 39.09% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NMPAX Columbia Mid Cap Index Fund	10.45%	9.34%	11.35%	7.97%	11.65%	18.03%	5.96%	5.70%	10.06%	7.66%	7.97%	10.12%
VNVYX Natixis Funds Trust II Vaughan Nelson Mid Cap Fund	39.09%	45.02%	11.91%	0.53%	3.46%	16.14%	12.25%	1.07%	9.78%	2.71%	3.33%	2.58%

Frequently Asked Questions

Can I hold both NMPAX and VNVYX in my portfolio?

NMPAX and VNVYX have a correlation of 0.69, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, NMPAX or VNVYX?

VNVYX has higher volatility (5.87%) compared to NMPAX (3.40%). In terms of maximum drawdown, NMPAX dropped -54.31% vs VNVYX's -42.81%.

Which has better risk-adjusted returns?

NMPAX currently has the higher Sharpe Ratio (1.33 vs 1.11), 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.