BGSAX vs. MAPYX

Last updated Jun 20, 2026

BGSAX (BlackRock Technology Opportunities Fund Investor A) and MAPYX (BlackRock Pennsylvania Municipal Bond Fund) are both mutual funds - BGSAX is a Technology Equities fund managed by BlackRock, while MAPYX is a Municipal Bonds fund managed by BlackRock. Over the past 10 years, BGSAX returned 25.97%/yr vs 1.96%/yr for MAPYX. At a correlation of -0.07, they often move in opposite directions. BGSAX charges 1.20%/yr vs 0.54%/yr for MAPYX.

Performance

BGSAX vs. MAPYX - Performance Comparison

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

Returns By Period

In the year-to-date period, BGSAX achieves a 43.57% return, which is significantly higher than MAPYX's 2.07% return. Over the past 10 years, BGSAX has outperformed MAPYX with an annualized return of 25.97%, while MAPYX has yielded a comparatively lower 1.96% annualized return.

BGSAX

• 1D: 4.46%
• 1M: 9.19%
• YTD: 43.57%
• 6M: 44.34%
• 1Y: 67.10%
• 3Y*: 38.82%
• 5Y*: 16.37%
• 10Y*: 25.97%

MAPYX

• 1D: 0.10%
• 1M: 2.18%
• YTD: 2.07%
• 6M: 2.49%
• 1Y: 8.45%
• 3Y*: 4.70%
• 5Y*: 0.77%
• 10Y*: 1.96%

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

BGSAX vs. MAPYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
MAPYX BlackRock Pennsylvania Municipal Bond Fund	2.07%	5.20%	3.57%	5.80%	-12.40%	3.18%	4.29%	6.67%	0.73%	5.78%

Correlation

The correlation between BGSAX and MAPYX is 0.09, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.09
Correlation (3Y) Calculated over the trailing 3-year period	0.07
Correlation (5Y) Calculated over the trailing 5-year period	0.10
Correlation (10Y) Calculated over the trailing 10-year period	0.06
Correlation (All Time) Calculated using the full available price history since May 15, 2000	-0.07

The correlation between BGSAX and MAPYX shifts across timeframes, from -0.07 (all time) to 0.10 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

BGSAX vs. MAPYX — Risk / Return Rank

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

BGSAX

BGSAX Risk / Return Rank: 69
BGSAX Sharpe Ratio Rank: 80
BGSAX Sortino Ratio Rank: 62
BGSAX Omega Ratio Rank: 66
BGSAX Calmar Ratio Rank: 83
BGSAX Martin Ratio Rank: 57

MAPYX

MAPYX Risk / Return Rank: 72
MAPYX Sharpe Ratio Rank: 85
MAPYX Sortino Ratio Rank: 88
MAPYX Omega Ratio Rank: 91
MAPYX Calmar Ratio Rank: 50
MAPYX Martin Ratio Rank: 45

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.

BGSAX vs. MAPYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Technology Opportunities Fund Investor A (BGSAX) and BlackRock Pennsylvania Municipal Bond Fund (MAPYX). 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.

	BGSAX	MAPYX	Difference
Sharpe ratio: Return per unit of total volatility	2.37	2.55	-0.18
Sortino ratio: Return per unit of downside risk	2.89	3.92	-1.02
Omega ratio: Gain probability vs. loss probability	1.40	1.63	-0.23
Calmar ratio: Return relative to maximum drawdown	3.57	2.57	+1.00
Martin ratio: Return relative to average drawdown	10.42	8.83	+1.59

BGSAX vs. MAPYX - Sharpe Ratio Comparison

The current BGSAX Sharpe Ratio is 2.37, which is comparable to the MAPYX Sharpe Ratio of 2.55. The chart below compares the historical Sharpe Ratios of BGSAX and MAPYX, 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

BGSAX vs. MAPYX - Drawdown Comparison

The maximum BGSAX drawdown since its inception was -73.75%, which is greater than MAPYX's maximum drawdown of -17.13%. Use the drawdown chart below to compare losses from any high point for BGSAX and MAPYX.

Drawdown Indicators

	BGSAX	MAPYX	Difference
Max Drawdown Largest peak-to-trough decline	-73.75%	-17.13%	-56.62%
Max Drawdown (1Y) Largest decline over 1 year	-18.49%	-3.30%	-15.19%
Max Drawdown (3Y) Largest decline over 3 years	-27.75%	-7.06%	-20.69%
Max Drawdown (5Y) Largest decline over 5 years	-49.22%	-17.13%	-32.09%
Max Drawdown (10Y) Largest decline over 10 years	-49.22%	-17.13%	-32.09%
Current Drawdown Current decline from peak	-0.29%	-0.02%	-0.27%
Average Drawdown Average peak-to-trough decline	-26.33%	-2.28%	-24.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.32%	0.96%	+5.36%

Volatility

BGSAX vs. MAPYX - Volatility Comparison

BlackRock Technology Opportunities Fund Investor A (BGSAX) has a higher volatility of 14.41% compared to BlackRock Pennsylvania Municipal Bond Fund (MAPYX) at 0.86%. This indicates that BGSAX's price experiences larger fluctuations and is considered to be riskier than MAPYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BGSAX	MAPYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	14.41%	0.86%	+13.55%
Volatility (6M) Calculated over the trailing 6-month period	23.82%	2.48%	+21.34%
Volatility (1Y) Calculated over the trailing 1-year period	27.87%	3.33%	+24.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	28.32%	5.28%	+23.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	26.19%	4.86%	+21.33%

BGSAX vs. MAPYX - Expense Ratio Comparison

BGSAX has a 1.20% expense ratio, which is higher than MAPYX's 0.54% expense ratio.

Dividends

BGSAX vs. MAPYX - Dividend Comparison

BGSAX's dividend yield for the trailing twelve months is around 9.44%, more than MAPYX's 3.81% 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%
MAPYX BlackRock Pennsylvania Municipal Bond Fund	3.81%	4.98%	4.11%	3.00%	2.17%	2.59%	3.14%	3.79%	4.03%	4.16%	4.12%	4.00%

Frequently Asked Questions

Can I hold both BGSAX and MAPYX in my portfolio?

BGSAX and MAPYX have a correlation of 0.09, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BGSAX or MAPYX?

BGSAX has higher volatility (14.41%) compared to MAPYX (0.86%). In terms of maximum drawdown, BGSAX dropped -73.75% vs MAPYX's -17.13%.

Which has better risk-adjusted returns?

MAPYX currently has the higher Sharpe Ratio (2.55 vs 2.37), 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.