IRCZX vs. WISIX

Last updated Jun 5, 2026

IRCZX (AB International Small Cap Portfolio) and WISIX (William Blair International Small Cap Growth Fund) are both Foreign Small & Mid Cap Equities funds. Over the past 10 years, IRCZX returned 8.76%/yr vs 6.03%/yr for WISIX. Their correlation of 0.83 suggests significant overlap in exposure. IRCZX charges 1.07%/yr vs 1.23%/yr for WISIX.

Performance

IRCZX vs. WISIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AB International Small Cap Portfolio (IRCZX) and William Blair International Small Cap Growth Fund (WISIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with IRCZX having a 13.06% return and WISIX slightly lower at 12.52%. Over the past 10 years, IRCZX has outperformed WISIX with an annualized return of 8.76%, while WISIX has yielded a comparatively lower 6.03% annualized return.

IRCZX

• 1D: -1.03%
• 1M: -0.32%
• YTD: 13.06%
• 6M: 16.08%
• 1Y: 26.80%
• 3Y*: 20.09%
• 5Y*: 7.58%
• 10Y*: 8.76%

WISIX

• 1D: -0.06%
• 1M: 1.28%
• YTD: 12.52%
• 6M: 15.10%
• 1Y: 12.18%
• 3Y*: 10.90%
• 5Y*: 0.48%
• 10Y*: 6.03%

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

IRCZX vs. WISIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IRCZX AB International Small Cap Portfolio	13.06%	34.96%	7.69%	13.19%	-20.89%	12.49%	8.23%	19.37%	-17.67%	32.14%
WISIX William Blair International Small Cap Growth Fund	12.52%	15.31%	0.80%	14.72%	-34.99%	11.01%	29.09%	34.22%	-24.27%	32.71%

Correlation

The correlation between IRCZX and WISIX is 0.76, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.76
Correlation (3Y) Calculated over the trailing 3-year period	0.79
Correlation (5Y) Calculated over the trailing 5-year period	0.83
Correlation (10Y) Calculated over the trailing 10-year period	0.83
Correlation (All Time) Calculated using the full available price history since Jan 5, 2016	0.83

The correlation between IRCZX and WISIX has been stable across timeframes, ranging from 0.76 to 0.83 - a consistent structural relationship.

Return for Risk

IRCZX vs. WISIX — Risk / Return Rank

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

IRCZX

IRCZX Risk / Return Rank: 46
IRCZX Sharpe Ratio Rank: 47
IRCZX Sortino Ratio Rank: 44
IRCZX Omega Ratio Rank: 50
IRCZX Calmar Ratio Rank: 42
IRCZX Martin Ratio Rank: 48

WISIX

WISIX Risk / Return Rank: 14
WISIX Sharpe Ratio Rank: 13
WISIX Sortino Ratio Rank: 13
WISIX Omega Ratio Rank: 14
WISIX Calmar Ratio Rank: 16
WISIX Martin Ratio Rank: 13

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.

IRCZX vs. WISIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AB International Small Cap Portfolio (IRCZX) and William Blair International Small Cap Growth Fund (WISIX). 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.

	IRCZX	WISIX	Difference
Sharpe ratio: Return per unit of total volatility	1.94	0.98	+0.96
Sortino ratio: Return per unit of downside risk	2.69	1.45	+1.24
Omega ratio: Gain probability vs. loss probability	1.37	1.19	+0.18
Calmar ratio: Return relative to maximum drawdown	2.41	1.33	+1.08
Martin ratio: Return relative to average drawdown	9.65	3.69	+5.96
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IRCZX vs. WISIX - Sharpe Ratio Comparison

The current IRCZX Sharpe Ratio is 1.94, which is higher than the WISIX Sharpe Ratio of 0.98. The chart below compares the historical Sharpe Ratios of IRCZX and WISIX, 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

	IRCZX	WISIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.94	0.98	+0.96
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.49	0.03	+0.46
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.54	0.35	+0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.35	+0.21

Drawdowns

IRCZX vs. WISIX - Drawdown Comparison

The maximum IRCZX drawdown since its inception was -44.50%, smaller than the maximum WISIX drawdown of -64.84%. Use the drawdown chart below to compare losses from any high point for IRCZX and WISIX.

Drawdown Indicators

	IRCZX	WISIX	Difference
Max Drawdown Largest peak-to-trough decline	-44.50%	-64.84%	+20.34%
Max Drawdown (1Y) Largest decline over 1 year	-11.59%	-10.09%	-1.50%
Max Drawdown (3Y) Largest decline over 3 years	-13.74%	-17.90%	+4.16%
Max Drawdown (5Y) Largest decline over 5 years	-34.68%	-47.76%	+13.08%
Max Drawdown (10Y) Largest decline over 10 years	-44.50%	-47.76%	+3.26%
Current Drawdown Current decline from peak	-2.53%	-9.81%	+7.28%
Average Drawdown Average peak-to-trough decline	-9.35%	-16.56%	+7.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.89%	3.62%	-0.73%

Volatility

IRCZX vs. WISIX - Volatility Comparison

AB International Small Cap Portfolio (IRCZX) has a higher volatility of 5.01% compared to William Blair International Small Cap Growth Fund (WISIX) at 4.53%. This indicates that IRCZX's price experiences larger fluctuations and is considered to be riskier than WISIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IRCZX	WISIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.01%	4.53%	+0.48%
Volatility (6M) Calculated over the trailing 6-month period	12.15%	11.37%	+0.78%
Volatility (1Y) Calculated over the trailing 1-year period	14.37%	13.71%	+0.66%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.69%	17.29%	-1.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.16%	17.35%	-1.19%

IRCZX vs. WISIX - Expense Ratio Comparison

IRCZX has a 1.07% expense ratio, which is lower than WISIX's 1.23% expense ratio.

Dividends

IRCZX vs. WISIX - Dividend Comparison

IRCZX's dividend yield for the trailing twelve months is around 13.66%, more than WISIX's 0.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IRCZX AB International Small Cap Portfolio	13.66%	15.44%	2.70%	2.95%	1.07%	3.88%	1.14%	1.96%	10.24%	3.79%	2.72%	0.00%
WISIX William Blair International Small Cap Growth Fund	0.54%	0.61%	1.78%	0.88%	0.21%	16.20%	2.09%	0.31%	13.84%	9.94%	0.36%	2.31%

Frequently Asked Questions

Can I hold both IRCZX and WISIX in my portfolio?

IRCZX and WISIX have a correlation of 0.76, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IRCZX or WISIX?

IRCZX has higher volatility (5.01%) compared to WISIX (4.53%). In terms of maximum drawdown, IRCZX dropped -44.50% vs WISIX's -64.84%.

Which has better risk-adjusted returns?

IRCZX currently has the higher Sharpe Ratio (1.94 vs 0.98), 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.