ISCB vs. VIOO

Last updated Jun 4, 2026

ISCB (iShares Morningstar Small-Cap ETF) and VIOO (Vanguard S&P Small-Cap 600 ETF) are both Small Cap Blend Equities funds - ISCB tracks the Morningstar US Small Cap Extended Index while VIOO tracks the S&P SmallCap 600 Index. Both are passively managed. Over the past 10 years, ISCB returned 9.30%/yr vs 10.67%/yr for VIOO. Their correlation of 0.93 suggests significant overlap in exposure. ISCB charges 0.04%/yr vs 0.10%/yr for VIOO.

Performance

ISCB vs. VIOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Morningstar Small-Cap ETF (ISCB) and Vanguard S&P Small-Cap 600 ETF (VIOO). 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 VIOO's 15.34% return. Over the past 10 years, ISCB has underperformed VIOO with an annualized return of 9.30%, while VIOO has yielded a comparatively higher 10.67% annualized 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%

VIOO

• 1D: -0.88%
• 1M: 1.64%
• YTD: 15.34%
• 6M: 14.20%
• 1Y: 31.68%
• 3Y*: 14.40%
• 5Y*: 5.66%
• 10Y*: 10.67%

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

ISCB vs. VIOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ISCB iShares Morningstar Small-Cap ETF	11.43%	12.46%	10.90%	19.51%	-19.04%	17.46%	6.29%	29.42%	-13.92%	12.95%
VIOO Vanguard S&P Small-Cap 600 ETF	15.34%	6.04%	8.48%	16.16%	-16.26%	26.79%	11.47%	22.68%	-8.65%	13.16%

Correlation

The correlation between ISCB and VIOO is 0.96 - 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	0.97
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Sep 10, 2010	0.93

The correlation between ISCB and VIOO has been stable across timeframes, ranging from 0.93 to 0.97 - a consistent structural relationship.

ISCB vs. VIOO - Sectors Allocation Comparison

Sectors	ISCB	VIOO
Industrials	18.5%	15.5%
Financial Services	15.9%	16.9%
Technology	14.6%	15.5%
Healthcare	13.3%	11.0%
Consumer Cyclical	11.8%	13.4%
Real Estate	8.2%	7.7%
Energy	4.9%	5.9%
Basic Materials	4.6%	5.1%
Consumer Defensive	3.4%	3.5%
Communication Services	2.6%	3.6%
Utilities	2.3%	2.0%

Return for Risk

ISCB vs. VIOO — 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

VIOO

VIOO Risk / Return Rank: 58
VIOO Sharpe Ratio Rank: 52
VIOO Sortino Ratio Rank: 54
VIOO Omega Ratio Rank: 49
VIOO Calmar Ratio Rank: 72
VIOO Martin Ratio Rank: 65

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. VIOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Morningstar Small-Cap ETF (ISCB) and Vanguard S&P Small-Cap 600 ETF (VIOO). 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	VIOO	Difference
Sharpe ratio: Return per unit of total volatility	1.80	1.82	-0.02
Sortino ratio: Return per unit of downside risk	2.60	2.64	-0.05
Omega ratio: Gain probability vs. loss probability	1.31	1.31	0.00
Calmar ratio: Return relative to maximum drawdown	3.15	3.63	-0.48
Martin ratio: Return relative to average drawdown	11.26	12.14	-0.89
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. VIOO - Sharpe Ratio Comparison

The current ISCB Sharpe Ratio is 1.80, which is comparable to the VIOO Sharpe Ratio of 1.82. The chart below compares the historical Sharpe Ratios of ISCB and VIOO, 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	VIOO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.80	1.82	-0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.27	0.27	0.00
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.41	0.47	-0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.38	0.57	-0.19

Drawdowns

ISCB vs. VIOO - Drawdown Comparison

The maximum ISCB drawdown since its inception was -61.25%, which is greater than VIOO's maximum drawdown of -44.15%. Use the drawdown chart below to compare losses from any high point for ISCB and VIOO.

Drawdown Indicators

	ISCB	VIOO	Difference
Max Drawdown Largest peak-to-trough decline	-61.25%	-44.15%	-17.10%
Max Drawdown (1Y) Largest decline over 1 year	-9.39%	-8.77%	-0.62%
Max Drawdown (3Y) Largest decline over 3 years	-26.22%	-27.93%	+1.71%
Max Drawdown (5Y) Largest decline over 5 years	-29.94%	-27.93%	-2.01%
Max Drawdown (10Y) Largest decline over 10 years	-44.18%	-44.15%	-0.03%
Current Drawdown Current decline from peak	-0.67%	-0.89%	+0.22%
Average Drawdown Average peak-to-trough decline	-9.80%	-7.33%	-2.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.63%	2.62%	+0.01%

Volatility

ISCB vs. VIOO - Volatility Comparison

iShares Morningstar Small-Cap ETF (ISCB) and Vanguard S&P Small-Cap 600 ETF (VIOO) have volatilities of 4.28% 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.

Volatility by Period

	ISCB	VIOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.28%	4.40%	-0.12%
Volatility (6M) Calculated over the trailing 6-month period	11.43%	11.71%	-0.28%
Volatility (1Y) Calculated over the trailing 1-year period	16.51%	17.59%	-1.08%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.39%	21.40%	-0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.68%	22.99%	-0.31%

ISCB vs. VIOO - Expense Ratio Comparison

ISCB has a 0.04% expense ratio, which is lower than VIOO's 0.10% 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

ISCB vs. VIOO - Dividend Comparison

ISCB's dividend yield for the trailing twelve months is around 1.27%, more than VIOO's 1.18% 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%
VIOO Vanguard S&P Small-Cap 600 ETF	1.18%	1.36%	1.48%	1.47%	1.51%	1.16%	1.09%	1.37%	1.32%	1.11%	1.06%	1.26%

Frequently Asked Questions

Can I hold both ISCB and VIOO in my portfolio?

With a correlation of 0.96, ISCB and VIOO 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 VIOO?

VIOO has higher volatility (4.40%) compared to ISCB (4.28%). In terms of maximum drawdown, ISCB dropped -61.25% vs VIOO's -44.15%.

Which ETF is better, ISCB or VIOO?

On 10-year performance, VIOO leads with 10.67% vs 9.30% for ISCB. 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 VIOO?

Over the 10-year period, VIOO has performed better with a 10.67% return vs 9.30%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, ISCB or VIOO?

ISCB is cheaper with a 0.04% expense ratio, compared with 0.10% for VIOO.

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

ISCB has the higher dividend yield at 1.27%, compared with 1.18% for VIOO.

What is the main difference between ISCB and VIOO?

ISCB tracks Morningstar US Small Cap Extended Index, while VIOO tracks S&P SmallCap 600 Index. They also come from different issuers: iShares and Vanguard. Their fees differ too: 0.04% for ISCB and 0.10% for VIOO.

Which has better risk-adjusted returns?

VIOO currently has the higher Sharpe Ratio (1.82 vs 1.80), 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.