MAEFX vs. BGSAX

Last updated Jun 23, 2026

MAEFX (BlackRock EuroFund Fund) and BGSAX (BlackRock Technology Opportunities Fund Investor A) are both mutual funds - MAEFX is a Europe Equities fund managed by BlackRock, while BGSAX is a Technology Equities fund managed by BlackRock. Over the past 10 years, MAEFX returned 8.21%/yr vs 25.97%/yr for BGSAX. A 0.63 correlation means they provide meaningful diversification when combined. MAEFX charges 1.10%/yr vs 1.20%/yr for BGSAX.

Performance

MAEFX vs. BGSAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock EuroFund Fund (MAEFX) and BlackRock Technology Opportunities Fund Investor A (BGSAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MAEFX achieves a 11.05% return, which is significantly lower than BGSAX's 43.57% return. Over the past 10 years, MAEFX has underperformed BGSAX with an annualized return of 8.21%, while BGSAX has yielded a comparatively higher 25.97% annualized return.

MAEFX

• 1D: 2.25%
• 1M: 7.78%
• YTD: 11.05%
• 6M: 11.20%
• 1Y: 16.49%
• 3Y*: 13.11%
• 5Y*: 6.88%
• 10Y*: 8.21%

BGSAX

• 1D: 4.46%
• 1M: 9.11%
• YTD: 43.57%
• 6M: 43.11%
• 1Y: 67.10%
• 3Y*: 38.82%
• 5Y*: 16.37%
• 10Y*: 25.97%

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

MAEFX vs. BGSAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MAEFX BlackRock EuroFund Fund	11.05%	20.07%	7.21%	20.70%	-23.85%	19.53%	19.34%	25.17%	-19.83%	22.42%
BGSAX BlackRock Technology Opportunities Fund Investor A	43.57%	19.63%	40.56%	49.09%	-43.13%	8.19%	86.27%	43.84%	2.03%	49.45%

Correlation

The correlation between MAEFX and BGSAX is 0.72, 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	0.72
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.72
Correlation (10Y) Calculated over the trailing 10-year period	0.68
Correlation (All Time) Calculated using the full available price history since May 15, 2000	0.63

The correlation between MAEFX and BGSAX has been stable across timeframes, ranging from 0.63 to 0.72 - a consistent structural relationship.

Return for Risk

MAEFX vs. BGSAX — Risk / Return Rank

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

MAEFX

MAEFX Risk / Return Rank: 10
MAEFX Sharpe Ratio Rank: 9
MAEFX Sortino Ratio Rank: 10
MAEFX Omega Ratio Rank: 10
MAEFX Calmar Ratio Rank: 10
MAEFX Martin Ratio Rank: 11

BGSAX

BGSAX Risk / Return Rank: 66
BGSAX Sharpe Ratio Rank: 78
BGSAX Sortino Ratio Rank: 56
BGSAX Omega Ratio Rank: 61
BGSAX Calmar Ratio Rank: 82
BGSAX Martin Ratio Rank: 55

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.

MAEFX vs. BGSAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock EuroFund Fund (MAEFX) and BlackRock Technology Opportunities Fund Investor A (BGSAX). 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.

	MAEFX	BGSAX	Difference
Sharpe ratio: Return per unit of total volatility	0.74	2.37	-1.63
Sortino ratio: Return per unit of downside risk	1.18	2.89	-1.71
Omega ratio: Gain probability vs. loss probability	1.14	1.40	-0.25
Calmar ratio: Return relative to maximum drawdown	0.92	3.57	-2.65
Martin ratio: Return relative to average drawdown	2.94	10.42	-7.48

MAEFX vs. BGSAX - Sharpe Ratio Comparison

The current MAEFX Sharpe Ratio is 0.74, which is lower than the BGSAX Sharpe Ratio of 2.37. The chart below compares the historical Sharpe Ratios of MAEFX and BGSAX, 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

MAEFX vs. BGSAX - Drawdown Comparison

The maximum MAEFX drawdown since its inception was -62.58%, smaller than the maximum BGSAX drawdown of -73.75%. Use the drawdown chart below to compare losses from any high point for MAEFX and BGSAX.

Drawdown Indicators

	MAEFX	BGSAX	Difference
Max Drawdown Largest peak-to-trough decline	-62.58%	-73.75%	+11.17%
Max Drawdown (1Y) Largest decline over 1 year	-17.14%	-18.49%	+1.35%
Max Drawdown (3Y) Largest decline over 3 years	-20.00%	-27.75%	+7.75%
Max Drawdown (5Y) Largest decline over 5 years	-40.47%	-49.22%	+8.75%
Max Drawdown (10Y) Largest decline over 10 years	-40.51%	-49.22%	+8.71%
Current Drawdown Current decline from peak	0.00%	-0.29%	+0.29%
Average Drawdown Average peak-to-trough decline	-11.62%	-26.33%	+14.71%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.33%	6.32%	-0.99%

Volatility

MAEFX vs. BGSAX - Volatility Comparison

The current volatility for BlackRock EuroFund Fund (MAEFX) is 8.24%, while BlackRock Technology Opportunities Fund Investor A (BGSAX) has a volatility of 14.41%. This indicates that MAEFX experiences smaller price fluctuations and is considered to be less risky than BGSAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MAEFX	BGSAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.24%	14.41%	-6.17%
Volatility (6M) Calculated over the trailing 6-month period	18.63%	23.82%	-5.19%
Volatility (1Y) Calculated over the trailing 1-year period	21.35%	27.87%	-6.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.57%	28.32%	-5.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.64%	26.19%	-4.55%

MAEFX vs. BGSAX - Expense Ratio Comparison

MAEFX has a 1.10% expense ratio, which is lower than BGSAX's 1.20% expense ratio.

Dividends

MAEFX vs. BGSAX - Dividend Comparison

MAEFX's dividend yield for the trailing twelve months is around 10.43%, more than BGSAX's 9.44% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BGSAX BlackRock Technology Opportunities Fund Investor A	9.44%	13.55%	8.68%	0.00%	0.00%	7.66%	4.86%	1.50%	1.24%	8.01%	1.17%	0.00%
MAEFX BlackRock EuroFund Fund	10.43%	11.58%	1.29%	1.24%	0.76%	0.00%	0.00%	0.45%	2.81%	1.19%	2.32%	1.64%

Frequently Asked Questions

Can I hold both MAEFX and BGSAX in my portfolio?

MAEFX and BGSAX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MAEFX or BGSAX?

BGSAX has higher volatility (14.41%) compared to MAEFX (8.24%). In terms of maximum drawdown, MAEFX dropped -62.58% vs BGSAX's -73.75%.

Which has better risk-adjusted returns?

BGSAX currently has the higher Sharpe Ratio (2.37 vs 0.74), 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.