STMSX vs. BSIIX

Last updated Aug 1, 2026

STMSX (SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund) and BSIIX (BlackRock Strategic Income Opportunities Fund Class I) are both mutual funds - STMSX is a Small Cap Blend Equities fund managed by BlackRock, while BSIIX is a Total Bond Market fund managed by BlackRock. Over the past 10 years, STMSX returned 9.18%/yr vs 3.60%/yr for BSIIX. Their 0.24 correlation means their historical movements had little consistent relationship. STMSX charges 1.11%/yr vs 0.69%/yr for BSIIX.

Performance

STMSX vs. BSIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund (STMSX) and BlackRock Strategic Income Opportunities Fund Class I (BSIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, STMSX achieves a 15.18% return, which is significantly higher than BSIIX's 0.93% return. Over the past 10 years, STMSX has outperformed BSIIX with an annualized return of 9.18%, while BSIIX has yielded a comparatively lower 3.60% annualized return.

STMSX

• 1D: 0.81%
• 1M: -0.36%
• 6M: 10.73%
• YTD: 15.18%
• 1Y: 27.35%
• 3Y*: 13.44%
• 5Y*: 7.09%
• 10Y*: 9.18%
• ALL TIME*: 7.83%

BSIIX

• 1D: -0.10%
• 1M: -1.23%
• 6M: 0.10%
• YTD: 0.93%
• 1Y: 4.13%
• 3Y*: 6.32%
• 5Y*: 2.73%
• 10Y*: 3.60%
• ALL TIME*: 3.90%

*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)
BSIIX BlackRock Strategic Income Opportunities Fund Class I	$0.00	$0.00	$0.00
STMSX SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund	$0.00	$0.00	$0.00

STMSX vs. BSIIX - 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	15.18%	8.67%	13.34%	12.97%	-16.91%	23.68%	10.41%	21.99%	-12.34%	15.89%
BSIIX BlackRock Strategic Income Opportunities Fund Class I	0.93%	8.59%	5.22%	6.18%	-6.14%	0.80%	7.22%	7.65%	-0.42%	4.89%

Correlation

The correlation between STMSX and BSIIX is 0.46, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.46
Correlation (3Y) Balances recent behavior with more history.	0.34
Correlation (5Y) Shows whether the relationship held over a longer period.	0.33
Correlation (10Y) Provides a long-term view across more market conditions.	0.32
Correlation (All Time) Calculated using the full available price history since Feb 7, 2008	0.24

Over the past year, STMSX and BSIIX have become more correlated (0.46) than their long-term average of 0.24, meaning their price movements have been converging.

Return for Risk

STMSX vs. BSIIX — Risk / Return Rank

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

STMSX

STMSX Risk / Return Rank: 61
STMSX Sharpe Ratio Rank: 54
STMSX Sortino Ratio Rank: 59
STMSX Omega Ratio Rank: 48
STMSX Calmar Ratio Rank: 75
STMSX Martin Ratio Rank: 69

BSIIX

BSIIX Risk / Return Rank: 52
BSIIX Sharpe Ratio Rank: 57
BSIIX Sortino Ratio Rank: 65
BSIIX Omega Ratio Rank: 63
BSIIX Calmar Ratio Rank: 35
BSIIX Martin Ratio Rank: 38

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.

STMSX vs. BSIIX - 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 BlackRock Strategic Income Opportunities Fund Class I (BSIIX). 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.

	STMSX	BSIIX	Difference
Sharpe ratio: Return per unit of total volatility	1.45	1.54	-0.09
Sortino ratio: Return per unit of downside risk	2.18	2.35	-0.17
Omega ratio: Gain probability vs. loss probability	1.26	1.30	-0.04
Calmar ratio: Return relative to maximum drawdown	2.52	1.61	+0.91
Martin ratio: Return relative to average drawdown	8.83	5.86	+2.97

STMSX vs. BSIIX - Sharpe Ratio Comparison

The current STMSX Sharpe Ratio is 1.45, which is comparable to the BSIIX Sharpe Ratio of 1.54. The chart below compares the historical Sharpe Ratios of STMSX and BSIIX, 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

STMSX vs. BSIIX - Drawdown Comparison

The maximum STMSX drawdown since its inception was -60.78%, which is greater than BSIIX's maximum drawdown of -18.76%. Use the drawdown chart below to compare losses from any high point for STMSX and BSIIX.

Drawdown Indicators

	STMSX	BSIIX	Difference
Max Drawdown Largest peak-to-trough decline	-60.78%	-18.76%	-42.02%
Max Drawdown (1Y) Largest decline over 1 year	-9.69%	-2.84%	-6.85%
Max Drawdown (3Y) Largest decline over 3 years	-34.36%	-2.84%	-31.52%
Max Drawdown (5Y) Largest decline over 5 years	-34.36%	-9.13%	-25.23%
Max Drawdown (10Y) Largest decline over 10 years	-43.16%	-9.91%	-33.25%
Current Drawdown Current decline from peak	-1.96%	-1.35%	-0.61%
Average Drawdown Average peak-to-trough decline	-10.56%	-1.80%	-8.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.77%	0.78%	+1.99%

Volatility

STMSX vs. BSIIX - Volatility Comparison

SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund (STMSX) has a higher volatility of 3.62% compared to BlackRock Strategic Income Opportunities Fund Class I (BSIIX) at 0.69%. This indicates that STMSX's price experiences larger fluctuations and is considered to be riskier than BSIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	STMSX	BSIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.62%	0.69%	+2.93%
Volatility (6M) Calculated over the trailing 6-month period	12.22%	2.44%	+9.78%
Volatility (1Y) Calculated over the trailing 1-year period	16.82%	2.99%	+13.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.07%	3.03%	+20.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.83%	3.15%	+19.68%

STMSX vs. BSIIX - Expense Ratio Comparison

STMSX has a 1.11% expense ratio, which is higher than BSIIX's 0.69% expense ratio.

Dividends

STMSX vs. BSIIX - Dividend Comparison

STMSX's dividend yield for the trailing twelve months is around 3.59%, less than BSIIX's 4.83% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BSIIX BlackRock Strategic Income Opportunities Fund Class I	4.83%	5.07%	4.75%	3.33%	3.58%	2.98%	2.92%	3.54%	3.32%	3.45%	2.91%	3.19%
STMSX SEI Institutional Managed Trust Tax-Managed Small/Mid Cap Fund	3.59%	4.41%	21.88%	3.11%	0.84%	9.68%	0.29%	2.54%	9.26%	1.89%	0.41%	0.25%

Frequently Asked Questions

Can I hold both STMSX and BSIIX in my portfolio?

STMSX and BSIIX have a correlation of 0.46, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, STMSX or BSIIX?

STMSX has higher volatility (3.62%) compared to BSIIX (0.69%). In terms of maximum drawdown, STMSX dropped -60.78% vs BSIIX's -18.76%.

Which has better risk-adjusted returns?

BSIIX currently has the higher Sharpe Ratio (1.54 vs 1.45), 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.