VIEIX vs. SSMKX
VIEIX (Vanguard Extended Market Index Fund Institutional Shares) and SSMKX (State Street Small/Mid Cap Equity Index Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, VIEIX returned 11.74%/yr vs 12.04%/yr for SSMKX. Their 1.00 correlation means they have historically moved very closely together. VIEIX charges 0.04%/yr vs 0.04%/yr for SSMKX.
Performance
VIEIX vs. SSMKX - Performance Comparison
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Returns By Period
The year-to-date returns for both stocks are quite close, with VIEIX having a 13.51% return and SSMKX slightly lower at 13.33%. Both investments have delivered pretty close results over the past 10 years, with VIEIX having a 11.74% annualized return and SSMKX not far ahead at 12.04%.
VIEIX
- 1D
- -0.41%
- 1M
- -3.02%
- 6M
- 10.17%
- YTD
- 13.51%
- 1Y
- 23.28%
- 3Y*
- 15.99%
- 5Y*
- 6.11%
- 10Y*
- 11.74%
- ALL TIME*
- 9.03%
SSMKX
- 1D
- -0.48%
- 1M
- -2.89%
- 6M
- 9.84%
- YTD
- 13.33%
- 1Y
- 23.89%
- 3Y*
- 16.42%
- 5Y*
- 6.77%
- 10Y*
- 12.04%
- ALL TIME*
- 12.23%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
VIEIX vs. SSMKX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VIEIX Vanguard Extended Market Index Fund Institutional Shares | 13.51% | 11.42% | 15.49% | 26.97% | -26.46% | 12.46% | 32.24% | 28.05% | -9.36% | 18.12% |
SSMKX State Street Small/Mid Cap Equity Index Fund | 13.33% | 12.77% | 17.20% | 25.20% | -25.49% | 12.38% | 32.41% | 27.82% | -9.02% | 18.16% |
Correlation
The correlation between VIEIX and SSMKX is 1.00 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 1.00 |
Correlation (3Y) Balances recent behavior with more history. | 1.00 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 1.00 |
Correlation (10Y) Provides a long-term view across more market conditions. | 1.00 |
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016 | 1.00 |
The correlation between VIEIX and SSMKX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.
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Return for Risk
VIEIX vs. SSMKX — Risk / Return Rank
VIEIX
SSMKX
VIEIX vs. SSMKX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Extended Market Index Fund Institutional Shares (VIEIX) and State Street Small/Mid Cap Equity Index Fund (SSMKX). 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.
| VIEIX | SSMKX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.06 | ||
| Sortino ratioReturn per unit of downside risk | -0.08 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.22 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 2.03 | 2.15 | -0.11 |
| Martin ratioReturn relative to average drawdown | 6.88 | 7.47 | -0.58 |
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Drawdowns
VIEIX vs. SSMKX - Drawdown Comparison
The maximum VIEIX drawdown since its inception was -58.03%, which is greater than SSMKX's maximum drawdown of -41.65%. Use the drawdown chart below to compare losses from any high point for VIEIX and SSMKX.
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Drawdown Indicators
| VIEIX | SSMKX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -58.03% | -41.65% | -16.38% |
Max Drawdown (1Y)Largest decline over 1 year | -10.25% | -10.03% | -0.22% |
Max Drawdown (3Y)Largest decline over 3 years | -26.84% | -26.31% | -0.53% |
Max Drawdown (5Y)Largest decline over 5 years | -36.32% | -35.19% | -1.13% |
Max Drawdown (10Y)Largest decline over 10 years | -41.62% | -41.65% | +0.03% |
Current DrawdownCurrent decline from peak | -4.13% | -3.87% | -0.26% |
Average DrawdownAverage peak-to-trough decline | -13.77% | -8.59% | -5.18% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.02% | 2.88% | +0.14% |
Volatility
VIEIX vs. SSMKX - Volatility Comparison
Vanguard Extended Market Index Fund Institutional Shares (VIEIX) and State Street Small/Mid Cap Equity Index Fund (SSMKX) have volatilities of 3.88% and 3.92%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VIEIX | SSMKX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.88% | 3.92% | -0.04% |
Volatility (6M)Calculated over the trailing 6-month period | 13.31% | 13.24% | +0.07% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.81% | 17.53% | +0.28% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.40% | 22.31% | +0.09% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.34% | 22.24% | +0.10% |
VIEIX vs. SSMKX - Expense Ratio Comparison
VIEIX has a 0.04% expense ratio, which is lower than SSMKX's 0.05% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
VIEIX vs. SSMKX - Dividend Comparison
VIEIX's dividend yield for the trailing twelve months is around 1.04%, less than SSMKX's 4.50% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
SSMKX State Street Small/Mid Cap Equity Index Fund | 4.50% | 5.10% | 2.12% | 2.56% | 17.09% | 9.69% | 1.47% | 5.75% | 3.68% | 5.52% | 1.30% | 0.00% |
VIEIX Vanguard Extended Market Index Fund Institutional Shares | 1.04% | 1.14% | 1.10% | 1.26% | 1.16% | 1.14% | 1.08% | 1.31% | 1.67% | 1.27% | 1.45% | 1.37% |
Frequently Asked Questions
With a correlation of 1.00, VIEIX and SSMKX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
SSMKX has higher volatility (3.92%) compared to VIEIX (3.88%). In terms of maximum drawdown, VIEIX dropped -58.03% vs SSMKX's -41.65%.
SSMKX currently has the higher Sharpe Ratio (1.23 vs 1.17), 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.
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