BSPGX vs. BXMX

Last updated Jun 4, 2026

BSPGX (iShares S&P 500 Index Fund Class G) and BXMX (Nuveen S&P 500 Buy-Write Income Fund) are both S&P 500 funds. BSPGX is passively managed, while BXMX is actively managed. A 0.75 correlation means they provide meaningful diversification when combined. BSPGX charges 0.01%/yr vs 0.89%/yr for BXMX.

Performance

BSPGX vs. BXMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares S&P 500 Index Fund Class G (BSPGX) and Nuveen S&P 500 Buy-Write Income Fund (BXMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

BSPGX

• 1D: 0.13%
• 1M: 5.80%
• YTD: 11.70%
• 6M: 11.73%
• 1Y: 28.95%
• 3Y*: 22.73%
• 5Y*: 14.26%
• 10Y*: —

BXMX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

BSPGX vs. BXMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
BSPGX iShares S&P 500 Index Fund Class G	11.70%	17.85%	24.96%	26.27%	-18.12%	28.66%	19.16%	11.06%
BXMX Nuveen S&P 500 Buy-Write Income Fund	-8.03%	13.74%	17.26%	9.10%	-7.18%	20.83%	1.11%	6.64%

Correlation

The correlation between BSPGX and BXMX is 0.62, 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	0.62
Correlation (3Y) Calculated over the trailing 3-year period	0.74
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (All Time) Calculated using the full available price history since Jul 3, 2019	0.75

The correlation between BSPGX and BXMX shifts across timeframes, from 0.62 (1 year) to 0.76 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

BSPGX vs. BXMX — Risk / Return Rank

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

BSPGX

BSPGX Risk / Return Rank: 73
BSPGX Sharpe Ratio Rank: 76
BSPGX Sortino Ratio Rank: 67
BSPGX Omega Ratio Rank: 67
BSPGX Calmar Ratio Rank: 73
BSPGX Martin Ratio Rank: 83

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.

BSPGX vs. BXMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares S&P 500 Index Fund Class G (BSPGX) and Nuveen S&P 500 Buy-Write Income Fund (BXMX). 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.

	BSPGX	BXMX	Difference
Sharpe ratio Return per unit of total volatility	2.52	—	—
Sortino ratio Return per unit of downside risk	3.42	—	—
Omega ratio Gain probability vs. loss probability	1.46	—	—
Calmar ratio Return relative to maximum drawdown	3.35	—	—
Martin ratio Return relative to average drawdown	15.67	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	BSPGX	BXMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.52	—	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.85	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	—	—

Drawdowns

Drawdown Indicators

	BSPGX	BXMX	Difference
Max Drawdown Largest peak-to-trough decline	-33.74%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-8.90%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-18.73%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-24.50%	—	—
Current Drawdown Current decline from peak	0.00%	—	—
Average Drawdown Average peak-to-trough decline	-5.09%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	1.90%	—	—

Volatility

Volatility by Period

	BSPGX	BXMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.82%	—	—
Volatility (6M) Calculated over the trailing 6-month period	8.97%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	11.85%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.88%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.01%	—	—

BSPGX vs. BXMX - Expense Ratio Comparison

BSPGX has a 0.01% expense ratio, which is lower than BXMX's 0.89% expense ratio.

Dividends

BSPGX vs. BXMX - Dividend Comparison

BSPGX's dividend yield for the trailing twelve months is around 1.58%, less than BXMX's 8.22% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BSPGX iShares S&P 500 Index Fund Class G	1.58%	1.74%	1.43%	1.52%	2.04%	1.83%	2.09%	2.25%	0.00%	0.00%	0.00%	0.00%
BXMX Nuveen S&P 500 Buy-Write Income Fund	8.22%	7.41%	7.02%	7.37%	7.48%	5.87%	6.81%	6.76%	8.12%	6.41%	7.33%	7.42%

Frequently Asked Questions

Can I hold both BSPGX and BXMX in my portfolio?

BSPGX and BXMX have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.