SCOAX vs. VBMPX
SCOAX (SEI Institutional Investments Trust Core Fixed Income Fund) and VBMPX (Vanguard Total Bond Market Index Fund Institutional Plus Shares) are both mutual funds - SCOAX is a Intermediate Core Bond fund managed by SEI, while VBMPX is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Float Adjusted Index. Over the past 10 years, SCOAX returned 1.61%/yr vs 1.30%/yr for VBMPX. Their correlation of 0.93 means they have usually moved in the same direction. SCOAX charges 0.36%/yr vs 0.02%/yr for VBMPX.
Performance
SCOAX vs. VBMPX - Performance Comparison
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Returns By Period
The year-to-date returns for both investments are quite close, with SCOAX having a -0.72% return and VBMPX slightly higher at -0.69%. Over the past 10 years, SCOAX has outperformed VBMPX with an annualized return of 1.61%, while VBMPX has yielded a comparatively lower 1.30% annualized return.
SCOAX
- 1D
- 0.11%
- 1M
- -1.25%
- 6M
- -0.96%
- YTD
- -0.72%
- 1Y
- 1.84%
- 3Y*
- 3.43%
- 5Y*
- -0.86%
- 10Y*
- 1.61%
- ALL TIME*
- 1.10%
VBMPX
- 1D
- 0.00%
- 1M
- -1.25%
- 6M
- -0.93%
- YTD
- -0.69%
- 1Y
- 1.68%
- 3Y*
- 3.70%
- 5Y*
- -0.43%
- 10Y*
- 1.30%
- ALL TIME*
- 2.23%
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 |
SCOAX vs. VBMPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
SCOAX SEI Institutional Investments Trust Core Fixed Income Fund | -0.72% | 7.56% | 0.82% | 5.44% | -14.84% | -1.49% | 9.49% | 9.59% | 0.11% | 5.07% |
VBMPX Vanguard Total Bond Market Index Fund Institutional Plus Shares | -0.69% | 7.18% | 1.27% | 5.75% | -13.14% | -1.95% | 7.75% | 8.74% | -0.24% | 3.58% |
Correlation
The correlation between SCOAX and VBMPX is 0.95, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.95 |
Correlation (3Y) Balances recent behavior with more history. | 0.96 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.97 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.95 |
Correlation (All Time) Calculated using the full available price history since Feb 5, 2010 | 0.93 |
The correlation between SCOAX and VBMPX has been stable across timeframes, ranging from 0.93 to 0.97 - a consistent structural relationship.
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Return for Risk
SCOAX vs. VBMPX — Risk / Return Rank
SCOAX
VBMPX
SCOAX vs. VBMPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for SEI Institutional Investments Trust Core Fixed Income Fund (SCOAX) and Vanguard Total Bond Market Index Fund Institutional Plus Shares (VBMPX). 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.
| SCOAX | VBMPX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.05 | ||
| Sortino ratioReturn per unit of downside risk | +0.09 | ||
| Omega ratioGain probability vs. loss probability | 1.14 | 1.13 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.03 | 1.00 | +0.03 |
| Martin ratioReturn relative to average drawdown | 2.52 | 2.50 | +0.02 |
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Drawdowns
SCOAX vs. VBMPX - Drawdown Comparison
The maximum SCOAX drawdown since its inception was -20.12%, which is greater than VBMPX's maximum drawdown of -18.90%. Use the drawdown chart below to compare losses from any high point for SCOAX and VBMPX.
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Drawdown Indicators
| SCOAX | VBMPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -20.12% | -18.90% | -1.22% |
Max Drawdown (1Y)Largest decline over 1 year | -3.06% | -2.89% | -0.17% |
Max Drawdown (3Y)Largest decline over 3 years | -5.95% | -4.86% | -1.09% |
Max Drawdown (5Y)Largest decline over 5 years | -19.90% | -18.12% | -1.78% |
Max Drawdown (10Y)Largest decline over 10 years | -20.12% | -18.90% | -1.22% |
Current DrawdownCurrent decline from peak | -4.77% | -3.33% | -1.44% |
Average DrawdownAverage peak-to-trough decline | -5.45% | -3.52% | -1.93% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.25% | 1.15% | +0.10% |
Volatility
SCOAX vs. VBMPX - Volatility Comparison
SEI Institutional Investments Trust Core Fixed Income Fund (SCOAX) and Vanguard Total Bond Market Index Fund Institutional Plus Shares (VBMPX) have volatilities of 0.93% and 0.96%, 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
| SCOAX | VBMPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.93% | 0.96% | -0.03% |
Volatility (6M)Calculated over the trailing 6-month period | 3.06% | 2.97% | +0.09% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.93% | 3.83% | +0.10% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.37% | 6.02% | +0.35% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.23% | 4.98% | +0.25% |
SCOAX vs. VBMPX - Expense Ratio Comparison
SCOAX has a 0.36% expense ratio, which is higher than VBMPX's 0.02% expense ratio.
Dividends
SCOAX vs. VBMPX - Dividend Comparison
SCOAX's dividend yield for the trailing twelve months is around 3.96%, more than VBMPX's 3.73% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
SCOAX SEI Institutional Investments Trust Core Fixed Income Fund | 3.96% | 4.19% | 3.57% | 2.98% | 2.11% | 1.69% | 6.04% | 4.24% | 3.16% | 3.67% | 3.79% | 4.73% |
VBMPX Vanguard Total Bond Market Index Fund Institutional Plus Shares | 3.73% | 3.88% | 3.69% | 3.11% | 2.61% | 1.81% | 2.41% | 2.75% | 2.58% | 2.58% | 2.55% | 2.85% |
Frequently Asked Questions
With a correlation of 0.95, SCOAX and VBMPX 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.
VBMPX has higher volatility (0.96%) compared to SCOAX (0.93%). In terms of maximum drawdown, SCOAX dropped -20.12% vs VBMPX's -18.90%.
SCOAX currently has the higher Sharpe Ratio (0.81 vs 0.76), 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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