SIVIX vs. MOPIX

Last updated Jun 4, 2026

SIVIX (State Street Institutional Small-Cap Equity Fund) and MOPIX (MainStay WMC Small Companies Fund) are both Small Cap Blend Equities funds. Over the past 10 years, SIVIX returned 9.51%/yr vs 9.35%/yr for MOPIX. Their correlation of 0.93 suggests significant overlap in exposure. SIVIX charges 0.75%/yr vs 0.97%/yr for MOPIX.

Performance

SIVIX vs. MOPIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in State Street Institutional Small-Cap Equity Fund (SIVIX) and MainStay WMC Small Companies Fund (MOPIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SIVIX achieves a 9.31% return, which is significantly lower than MOPIX's 27.70% return. Both investments have delivered pretty close results over the past 10 years, with SIVIX having a 9.51% annualized return and MOPIX not far behind at 9.35%.

SIVIX

• 1D: 0.81%
• 1M: 2.35%
• YTD: 9.31%
• 6M: 8.62%
• 1Y: 15.25%
• 3Y*: 10.22%
• 5Y*: 4.28%
• 10Y*: 9.51%

MOPIX

• 1D: 0.76%
• 1M: 9.92%
• YTD: 27.70%
• 6M: 27.77%
• 1Y: 56.29%
• 3Y*: 23.19%
• 5Y*: 9.07%
• 10Y*: 9.35%

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

SIVIX vs. MOPIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SIVIX State Street Institutional Small-Cap Equity Fund	9.31%	0.64%	10.83%	14.23%	-14.99%	21.48%	15.19%	26.69%	-10.13%	13.22%
MOPIX MainStay WMC Small Companies Fund	27.70%	12.69%	16.07%	10.97%	-19.00%	17.55%	10.04%	17.70%	-16.42%	15.68%

Correlation

The correlation between SIVIX and MOPIX is 0.90, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Jan 5, 1999	0.93

The correlation between SIVIX and MOPIX has been stable across timeframes, ranging from 0.90 to 0.94 - a consistent structural relationship.

Return for Risk

SIVIX vs. MOPIX — Risk / Return Rank

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

SIVIX

SIVIX Risk / Return Rank: 16
SIVIX Sharpe Ratio Rank: 13
SIVIX Sortino Ratio Rank: 15
SIVIX Omega Ratio Rank: 13
SIVIX Calmar Ratio Rank: 18
SIVIX Martin Ratio Rank: 18

MOPIX

MOPIX Risk / Return Rank: 91
MOPIX Sharpe Ratio Rank: 93
MOPIX Sortino Ratio Rank: 89
MOPIX Omega Ratio Rank: 80
MOPIX Calmar Ratio Rank: 96
MOPIX Martin Ratio Rank: 95

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.

SIVIX vs. MOPIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for State Street Institutional Small-Cap Equity Fund (SIVIX) and MainStay WMC Small Companies Fund (MOPIX). 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.

	SIVIX	MOPIX	Difference
Sharpe ratio: Return per unit of total volatility	1.01	3.20	-2.19
Sortino ratio: Return per unit of downside risk	1.58	4.37	-2.79
Omega ratio: Gain probability vs. loss probability	1.18	1.53	-0.34
Calmar ratio: Return relative to maximum drawdown	1.57	6.08	-4.51
Martin ratio: Return relative to average drawdown	4.93	22.94	-18.00
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SIVIX vs. MOPIX - Sharpe Ratio Comparison

The current SIVIX Sharpe Ratio is 1.01, which is lower than the MOPIX Sharpe Ratio of 3.20. The chart below compares the historical Sharpe Ratios of SIVIX and MOPIX, 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

	SIVIX	MOPIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.01	3.20	-2.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.21	0.40	-0.19
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.45	0.40	+0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.49	-0.06

Drawdowns

SIVIX vs. MOPIX - Drawdown Comparison

The maximum SIVIX drawdown since its inception was -56.52%, smaller than the maximum MOPIX drawdown of -68.08%. Use the drawdown chart below to compare losses from any high point for SIVIX and MOPIX.

Drawdown Indicators

	SIVIX	MOPIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.52%	-68.08%	+11.56%
Max Drawdown (1Y) Largest decline over 1 year	-10.92%	-9.84%	-1.08%
Max Drawdown (3Y) Largest decline over 3 years	-25.67%	-26.99%	+1.32%
Max Drawdown (5Y) Largest decline over 5 years	-26.51%	-32.60%	+6.09%
Max Drawdown (10Y) Largest decline over 10 years	-43.92%	-48.01%	+4.09%
Current Drawdown Current decline from peak	-0.12%	0.00%	-0.12%
Average Drawdown Average peak-to-trough decline	-8.83%	-9.11%	+0.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.46%	2.60%	+0.86%

Volatility

SIVIX vs. MOPIX - Volatility Comparison

The current volatility for State Street Institutional Small-Cap Equity Fund (SIVIX) is 4.24%, while MainStay WMC Small Companies Fund (MOPIX) has a volatility of 5.92%. This indicates that SIVIX experiences smaller price fluctuations and is considered to be less risky than MOPIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SIVIX	MOPIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.24%	5.92%	-1.68%
Volatility (6M) Calculated over the trailing 6-month period	11.61%	13.71%	-2.10%
Volatility (1Y) Calculated over the trailing 1-year period	16.91%	18.68%	-1.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.29%	22.81%	-2.52%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.12%	23.38%	-2.26%

SIVIX vs. MOPIX - Expense Ratio Comparison

SIVIX has a 0.75% expense ratio, which is lower than MOPIX's 0.97% expense ratio.

Dividends

SIVIX vs. MOPIX - Dividend Comparison

SIVIX's dividend yield for the trailing twelve months is around 16.09%, more than MOPIX's 0.12% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MOPIX MainStay WMC Small Companies Fund	0.12%	0.15%	0.39%	0.33%	2.34%	29.42%	0.00%	0.50%	18.09%	8.32%	0.59%	0.37%
SIVIX State Street Institutional Small-Cap Equity Fund	16.09%	17.59%	10.99%	7.77%	4.87%	16.56%	3.16%	6.27%	19.92%	9.35%	3.38%	13.07%

Frequently Asked Questions

Can I hold both SIVIX and MOPIX in my portfolio?

SIVIX and MOPIX have a correlation of 0.90, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, SIVIX or MOPIX?

MOPIX has higher volatility (5.92%) compared to SIVIX (4.24%). In terms of maximum drawdown, SIVIX dropped -56.52% vs MOPIX's -68.08%.

Which has better risk-adjusted returns?

MOPIX currently has the higher Sharpe Ratio (3.20 vs 1.01), 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.