STMSX vs. VSCIX
STMSX (SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund) and VSCIX (Vanguard Small-Cap Index Fund Institutional Shares) are both Small Cap Blend Equities funds. Over the past 10 years, STMSX returned 9.35%/yr vs 11.38%/yr for VSCIX. With a 0.98 correlation, they move nearly in lockstep. STMSX charges 1.11%/yr vs 0.04%/yr for VSCIX.
Performance
STMSX vs. VSCIX - Performance Comparison
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Returns By Period
In the year-to-date period, STMSX achieves a 13.21% return, which is significantly lower than VSCIX's 14.94% return. Over the past 10 years, STMSX has underperformed VSCIX with an annualized return of 9.35%, while VSCIX has yielded a comparatively higher 11.38% annualized return.
STMSX
- 1D
- 1.05%
- 1M
- 2.23%
- YTD
- 13.21%
- 6M
- 13.30%
- 1Y
- 26.59%
- 3Y*
- 15.64%
- 5Y*
- 6.41%
- 10Y*
- 9.35%
VSCIX
- 1D
- 0.80%
- 1M
- 4.24%
- YTD
- 14.94%
- 6M
- 14.90%
- 1Y
- 29.67%
- 3Y*
- 17.32%
- 5Y*
- 7.35%
- 10Y*
- 11.38%
STMSX vs. VSCIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
STMSX SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund | 13.21% | 8.67% | 13.34% | 12.97% | -16.91% | 23.68% | 10.41% | 21.99% | -12.34% | 15.89% |
VSCIX Vanguard Small-Cap Index Fund Institutional Shares | 14.94% | 8.85% | 12.96% | 19.52% | -17.60% | 17.74% | 19.07% | 27.40% | -9.33% | 16.25% |
Correlation
The correlation between STMSX and VSCIX is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.96 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.96 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.97 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.98 |
Correlation (All Time) Calculated using the full available price history since Jan 3, 2001 | 0.98 |
The correlation between STMSX and VSCIX has been stable across timeframes, ranging from 0.95 to 0.98 - a consistent structural relationship.
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Return for Risk
STMSX vs. VSCIX — Risk / Return Rank
STMSX
VSCIX
STMSX vs. VSCIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund (STMSX) and Vanguard Small-Cap Index Fund Institutional Shares (VSCIX). 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.
| STMSX | VSCIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.25 | ||
| Sortino ratioReturn per unit of downside risk | -0.27 | ||
| Omega ratioGain probability vs. loss probability | 1.30 | 1.33 | -0.04 |
| Calmar ratioReturn relative to maximum drawdown | 2.90 | 3.51 | -0.61 |
| Martin ratioReturn relative to average drawdown | 10.15 | 12.98 | -2.83 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| STMSX | VSCIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.69 | 1.94 | -0.25 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.28 | 0.36 | -0.08 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.41 | 0.53 | -0.12 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.35 | 0.41 | -0.06 |
Drawdowns
STMSX vs. VSCIX - Drawdown Comparison
The maximum STMSX drawdown since its inception was -60.78%, roughly equal to the maximum VSCIX drawdown of -59.66%. Use the drawdown chart below to compare losses from any high point for STMSX and VSCIX.
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Drawdown Indicators
| STMSX | VSCIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -60.78% | -59.66% | -1.12% |
Max Drawdown (1Y)Largest decline over 1 year | -9.69% | -8.97% | -0.72% |
Max Drawdown (3Y)Largest decline over 3 years | -34.36% | -25.25% | -9.11% |
Max Drawdown (5Y)Largest decline over 5 years | -34.36% | -28.13% | -6.23% |
Max Drawdown (10Y)Largest decline over 10 years | -43.16% | -41.81% | -1.35% |
Current DrawdownCurrent decline from peak | -2.32% | 0.00% | -2.32% |
Average DrawdownAverage peak-to-trough decline | -10.62% | -10.12% | -0.50% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.77% | 2.42% | +0.35% |
Volatility
STMSX vs. VSCIX - Volatility Comparison
SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund (STMSX) and Vanguard Small-Cap Index Fund Institutional Shares (VSCIX) have volatilities of 4.61% and 4.40%, 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
| STMSX | VSCIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.61% | 4.40% | +0.21% |
Volatility (6M)Calculated over the trailing 6-month period | 11.97% | 11.72% | +0.25% |
Volatility (1Y)Calculated over the trailing 1-year period | 16.64% | 16.27% | +0.37% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 23.10% | 20.72% | +2.38% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.88% | 21.57% | +1.31% |
STMSX vs. VSCIX - Expense Ratio Comparison
STMSX has a 1.11% expense ratio, which is higher than VSCIX's 0.04% expense ratio.
Dividends
STMSX vs. VSCIX - Dividend Comparison
STMSX's dividend yield for the trailing twelve months is around 3.82%, more than VSCIX's 1.19% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
STMSX SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund | 3.82% | 4.41% | 21.88% | 3.11% | 0.84% | 9.68% | 0.29% | 2.54% | 9.26% | 1.89% | 0.41% | 0.25% |
VSCIX Vanguard Small-Cap Index Fund Institutional Shares | 1.19% | 1.34% | 1.31% | 1.55% | 1.55% | 1.25% | 1.15% | 1.40% | 1.68% | 1.36% | 1.50% | 1.49% |
Frequently Asked Questions
With a correlation of 0.95, STMSX and VSCIX 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.
STMSX has higher volatility (4.61%) compared to VSCIX (4.40%). In terms of maximum drawdown, STMSX dropped -60.78% vs VSCIX's -59.66%.
VSCIX currently has the higher Sharpe Ratio (1.94 vs 1.69), 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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