BIREX vs. CNREX

Last updated Jun 5, 2026

BIREX (BlackRock Real Estate Securities Fund) and CNREX (Commonwealth Real Estate Securities Fund) are both REIT funds. Over the past 10 years, BIREX returned 6.43%/yr vs 5.65%/yr for CNREX. Their correlation of 0.85 suggests significant overlap in exposure. BIREX charges 0.75%/yr vs 2.44%/yr for CNREX.

Performance

BIREX vs. CNREX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Real Estate Securities Fund (BIREX) and Commonwealth Real Estate Securities Fund (CNREX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BIREX achieves a 12.31% return, which is significantly higher than CNREX's 5.45% return. Over the past 10 years, BIREX has outperformed CNREX with an annualized return of 6.43%, while CNREX has yielded a comparatively lower 5.65% annualized return.

BIREX

• 1D: -0.06%
• 1M: -0.42%
• YTD: 12.31%
• 6M: 11.54%
• 1Y: 14.24%
• 3Y*: 10.52%
• 5Y*: 3.23%
• 10Y*: 6.43%

CNREX

• 1D: -0.64%
• 1M: -0.64%
• YTD: 5.45%
• 6M: 4.17%
• 1Y: 2.38%
• 3Y*: 8.27%
• 5Y*: 2.86%
• 10Y*: 5.65%

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

BIREX vs. CNREX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BIREX BlackRock Real Estate Securities Fund	12.31%	3.08%	3.75%	13.57%	-27.58%	46.24%	-4.17%	27.75%	-2.95%	6.19%
CNREX Commonwealth Real Estate Securities Fund	5.45%	-2.53%	5.97%	23.54%	-23.80%	33.89%	-2.86%	28.68%	-14.70%	14.60%

Correlation

The correlation between BIREX and CNREX 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	0.78
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Jan 3, 2013	0.85

The correlation between BIREX and CNREX has been stable across timeframes, ranging from 0.76 to 0.85 - a consistent structural relationship.

Return for Risk

BIREX vs. CNREX — Risk / Return Rank

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

BIREX

BIREX Risk / Return Rank: 19
BIREX Sharpe Ratio Rank: 16
BIREX Sortino Ratio Rank: 15
BIREX Omega Ratio Rank: 15
BIREX Calmar Ratio Rank: 23
BIREX Martin Ratio Rank: 24

CNREX

CNREX Risk / Return Rank: 4
CNREX Sharpe Ratio Rank: 4
CNREX Sortino Ratio Rank: 4
CNREX Omega Ratio Rank: 4
CNREX Calmar Ratio Rank: 4
CNREX Martin Ratio Rank: 4

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.

BIREX vs. CNREX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Real Estate Securities Fund (BIREX) and Commonwealth Real Estate Securities Fund (CNREX). 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.

	BIREX	CNREX	Difference
Sharpe ratio: Return per unit of total volatility	1.11	0.18	+0.93
Sortino ratio: Return per unit of downside risk	1.56	0.39	+1.17
Omega ratio: Gain probability vs. loss probability	1.20	1.04	+0.16
Calmar ratio: Return relative to maximum drawdown	1.77	0.21	+1.56
Martin ratio: Return relative to average drawdown	5.84	0.53	+5.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BIREX vs. CNREX - Sharpe Ratio Comparison

The current BIREX Sharpe Ratio is 1.11, which is higher than the CNREX Sharpe Ratio of 0.18. The chart below compares the historical Sharpe Ratios of BIREX and CNREX, 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

	BIREX	CNREX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.11	0.18	+0.93
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.17	0.16	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.31	0.30	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.20	+0.19

Drawdowns

BIREX vs. CNREX - Drawdown Comparison

The maximum BIREX drawdown since its inception was -41.92%, smaller than the maximum CNREX drawdown of -68.03%. Use the drawdown chart below to compare losses from any high point for BIREX and CNREX.

Drawdown Indicators

	BIREX	CNREX	Difference
Max Drawdown Largest peak-to-trough decline	-41.92%	-68.03%	+26.11%
Max Drawdown (1Y) Largest decline over 1 year	-8.16%	-13.38%	+5.22%
Max Drawdown (3Y) Largest decline over 3 years	-18.05%	-20.67%	+2.62%
Max Drawdown (5Y) Largest decline over 5 years	-34.76%	-31.39%	-3.37%
Max Drawdown (10Y) Largest decline over 10 years	-41.92%	-44.62%	+2.70%
Current Drawdown Current decline from peak	-2.47%	-6.14%	+3.67%
Average Drawdown Average peak-to-trough decline	-9.73%	-14.98%	+5.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.47%	5.39%	-2.92%

Volatility

BIREX vs. CNREX - Volatility Comparison

The current volatility for BlackRock Real Estate Securities Fund (BIREX) is 3.74%, while Commonwealth Real Estate Securities Fund (CNREX) has a volatility of 4.77%. This indicates that BIREX experiences smaller price fluctuations and is considered to be less risky than CNREX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BIREX	CNREX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.74%	4.77%	-1.03%
Volatility (6M) Calculated over the trailing 6-month period	9.45%	11.56%	-2.11%
Volatility (1Y) Calculated over the trailing 1-year period	13.00%	15.39%	-2.39%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.75%	17.68%	+1.07%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.89%	19.01%	+1.88%

BIREX vs. CNREX - Expense Ratio Comparison

BIREX has a 0.75% expense ratio, which is lower than CNREX's 2.44% expense ratio.

Dividends

BIREX vs. CNREX - Dividend Comparison

BIREX's dividend yield for the trailing twelve months is around 2.71%, less than CNREX's 2.97% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BIREX BlackRock Real Estate Securities Fund	2.71%	2.98%	2.88%	2.87%	4.36%	1.63%	2.16%	1.93%	3.07%	9.88%	6.72%	6.75%
CNREX Commonwealth Real Estate Securities Fund	2.97%	3.13%	1.83%	0.00%	0.59%	0.68%	0.00%	0.85%	0.72%	0.34%	0.00%	1.52%

Frequently Asked Questions

Can I hold both BIREX and CNREX in my portfolio?

BIREX and CNREX 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, BIREX or CNREX?

CNREX has higher volatility (4.77%) compared to BIREX (3.74%). In terms of maximum drawdown, BIREX dropped -41.92% vs CNREX's -68.03%.

Which has better risk-adjusted returns?

BIREX currently has the higher Sharpe Ratio (1.11 vs 0.18), 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.