ISCB vs. SEIS

Last updated Jun 4, 2026

ISCB (iShares Morningstar Small-Cap ETF) and SEIS (SEI Select Small Cap ETF) are both Small Cap Blend Equities funds. ISCB is passively managed, while SEIS is actively managed. Over the past year, ISCB returned 29.48% vs 28.28% for SEIS. With a 0.95 correlation, they move nearly in lockstep. ISCB charges 0.04%/yr vs 0.55%/yr for SEIS.

Performance

ISCB vs. SEIS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Morningstar Small-Cap ETF (ISCB) and SEI Select Small Cap ETF (SEIS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ISCB achieves a 11.43% return, which is significantly lower than SEIS's 13.79% return.

ISCB

• 1D: -0.67%
• 1M: 2.77%
• YTD: 11.43%
• 6M: 11.42%
• 1Y: 29.48%
• 3Y*: 16.41%
• 5Y*: 5.72%
• 10Y*: 9.30%

SEIS

• 1D: -0.66%
• 1M: 2.34%
• YTD: 13.79%
• 6M: 13.11%
• 1Y: 28.28%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

ISCB vs. SEIS - Yearly Performance Comparison

	2026 (YTD)	2025	2024
ISCB iShares Morningstar Small-Cap ETF	11.43%	12.46%	1.93%
SEIS SEI Select Small Cap ETF	13.79%	9.81%	1.14%

Correlation

The correlation between ISCB and SEIS is 0.95, 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	0.95
Correlation (All Time) Calculated using the full available price history since Oct 11, 2024	0.95

The correlation between ISCB and SEIS has been stable across timeframes, ranging from 0.95 to 0.95 - a consistent structural relationship.

Return for Risk

ISCB vs. SEIS — Risk / Return Rank

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

ISCB

ISCB Risk / Return Rank: 56
ISCB Sharpe Ratio Rank: 52
ISCB Sortino Ratio Rank: 53
ISCB Omega Ratio Rank: 49
ISCB Calmar Ratio Rank: 63
ISCB Martin Ratio Rank: 62

SEIS

SEIS Risk / Return Rank: 47
SEIS Sharpe Ratio Rank: 44
SEIS Sortino Ratio Rank: 45
SEIS Omega Ratio Rank: 41
SEIS Calmar Ratio Rank: 52
SEIS Martin Ratio Rank: 51

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.

ISCB vs. SEIS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Morningstar Small-Cap ETF (ISCB) and SEI Select Small Cap ETF (SEIS). 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.

	ISCB	SEIS	Difference
Sharpe ratio: Return per unit of total volatility	1.80	1.50	+0.30
Sortino ratio: Return per unit of downside risk	2.60	2.22	+0.38
Omega ratio: Gain probability vs. loss probability	1.31	1.26	+0.04
Calmar ratio: Return relative to maximum drawdown	3.15	2.54	+0.61
Martin ratio: Return relative to average drawdown	11.26	8.43	+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.

ISCB vs. SEIS - Sharpe Ratio Comparison

The current ISCB Sharpe Ratio is 1.80, which is comparable to the SEIS Sharpe Ratio of 1.50. The chart below compares the historical Sharpe Ratios of ISCB and SEIS, 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

	ISCB	SEIS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.80	1.50	+0.30
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.41	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.38	0.70	-0.32

Drawdowns

ISCB vs. SEIS - Drawdown Comparison

The maximum ISCB drawdown since its inception was -61.25%, which is greater than SEIS's maximum drawdown of -26.08%. Use the drawdown chart below to compare losses from any high point for ISCB and SEIS.

Drawdown Indicators

	ISCB	SEIS	Difference
Max Drawdown Largest peak-to-trough decline	-61.25%	-26.08%	-35.17%
Max Drawdown (1Y) Largest decline over 1 year	-9.39%	-11.18%	+1.79%
Max Drawdown (3Y) Largest decline over 3 years	-26.22%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-29.94%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-44.18%	—	—
Current Drawdown Current decline from peak	-0.67%	-0.67%	0.00%
Average Drawdown Average peak-to-trough decline	-9.80%	-6.00%	-3.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.63%	3.36%	-0.73%

Volatility

ISCB vs. SEIS - Volatility Comparison

The current volatility for iShares Morningstar Small-Cap ETF (ISCB) is 4.28%, while SEI Select Small Cap ETF (SEIS) has a volatility of 5.42%. This indicates that ISCB experiences smaller price fluctuations and is considered to be less risky than SEIS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ISCB	SEIS	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.28%	5.42%	-1.14%
Volatility (6M) Calculated over the trailing 6-month period	11.43%	13.72%	-2.29%
Volatility (1Y) Calculated over the trailing 1-year period	16.51%	18.89%	-2.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.39%	22.11%	-0.72%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.68%	22.11%	+0.57%

ISCB vs. SEIS - Expense Ratio Comparison

ISCB has a 0.04% expense ratio, which is lower than SEIS's 0.55% expense ratio.

Dividends

ISCB vs. SEIS - Dividend Comparison

ISCB's dividend yield for the trailing twelve months is around 1.27%, more than SEIS's 0.37% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ISCB iShares Morningstar Small-Cap ETF	1.27%	1.38%	1.31%	1.49%	1.63%	1.26%	1.26%	1.25%	1.60%	1.24%	1.58%	1.40%
SEIS SEI Select Small Cap ETF	0.37%	0.59%	0.23%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both ISCB and SEIS in my portfolio?

With a correlation of 0.95, ISCB and SEIS 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.

Which is riskier, ISCB or SEIS?

SEIS has higher volatility (5.42%) compared to ISCB (4.28%). In terms of maximum drawdown, ISCB dropped -61.25% vs SEIS's -26.08%.

Which ETF is better, ISCB or SEIS?

On 1-year performance, ISCB leads with 29.48% vs 28.28% for SEIS. On fees, ISCB is cheaper at 0.04% per year. On volatility, ISCB has been the lower-risk option at 4.28%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, ISCB or SEIS?

Over the 1-year period, ISCB has performed better with a 29.48% return vs 28.28%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, ISCB or SEIS?

ISCB is cheaper with a 0.04% expense ratio, compared with 0.55% for SEIS.

Which ETF pays a higher dividend yield, ISCB or SEIS?

ISCB has the higher dividend yield at 1.27%, compared with 0.37% for SEIS.

What is the main difference between ISCB and SEIS?

They also come from different issuers: iShares and SEI. Their fees differ too: 0.04% for ISCB and 0.55% for SEIS.

Which has better risk-adjusted returns?

ISCB currently has the higher Sharpe Ratio (1.80 vs 1.50), 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.