MCSIX vs. BCSKX

Last updated Aug 1, 2026

MCSIX (MFS Commodity Strategy Fund) and BCSKX (BlackRock Commodity Strategies Fund Class K) are both Commodities funds. Over the past 5 years, MCSIX returned 10.26%/yr vs 11.92%/yr for BCSKX. Their 0.77 correlation means they have sometimes moved together and sometimes differently. MCSIX charges 0.90%/yr vs 0.67%/yr for BCSKX.

Performance

MCSIX vs. BCSKX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Commodity Strategy Fund (MCSIX) and BlackRock Commodity Strategies Fund Class K (BCSKX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MCSIX achieves a 19.61% return, which is significantly higher than BCSKX's 17.91% return.

MCSIX

• 1D: -0.23%
• 1M: 6.13%
• 6M: 9.07%
• YTD: 19.61%
• 1Y: 33.79%
• 3Y*: 12.81%
• 5Y*: 10.26%
• 10Y*: 7.39%
• ALL TIME*: 2.40%

BCSKX

• 1D: 0.47%
• 1M: 6.78%
• 6M: 6.40%
• YTD: 17.91%
• 1Y: 37.53%
• 3Y*: 15.03%
• 5Y*: 11.92%
• 10Y*: —
• ALL TIME*: 10.63%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BCSKX BlackRock Commodity Strategies Fund Class K	$0.00	$0.00	$0.00
MCSIX MFS Commodity Strategy Fund	$0.00	$0.00	$0.00

MCSIX vs. BCSKX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
MCSIX MFS Commodity Strategy Fund	19.61%	18.47%	5.08%	-6.13%	13.40%	27.55%	-0.02%	7.79%	-15.21%
BCSKX BlackRock Commodity Strategies Fund Class K	17.91%	28.88%	4.44%	-4.27%	11.95%	22.49%	6.84%	3.89%	2.06%

Correlation

The correlation between MCSIX and BCSKX is 0.87, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.87
Correlation (3Y) Balances recent behavior with more history.	0.83
Correlation (5Y) Shows whether the relationship held over a longer period.	0.83
Correlation (All Time) Calculated using the full available price history since Jan 29, 2018	0.77

The correlation between MCSIX and BCSKX shifts across timeframes, from 0.77 (all time) to 0.87 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

MCSIX vs. BCSKX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

MCSIX

MCSIX Risk / Return Rank: 73
MCSIX Sharpe Ratio Rank: 80
MCSIX Sortino Ratio Rank: 73
MCSIX Omega Ratio Rank: 76
MCSIX Calmar Ratio Rank: 75
MCSIX Martin Ratio Rank: 60

BCSKX

BCSKX Risk / Return Rank: 86
BCSKX Sharpe Ratio Rank: 92
BCSKX Sortino Ratio Rank: 84
BCSKX Omega Ratio Rank: 83
BCSKX Calmar Ratio Rank: 87
BCSKX Martin Ratio Rank: 83

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

MCSIX vs. BCSKX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Commodity Strategy Fund (MCSIX) and BlackRock Commodity Strategies Fund Class K (BCSKX). 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.

	MCSIX	BCSKX	Difference
Sharpe ratio: Return per unit of total volatility	1.90	2.35	-0.45
Sortino ratio: Return per unit of downside risk	2.48	2.98	-0.50
Omega ratio: Gain probability vs. loss probability	1.34	1.40	-0.06
Calmar ratio: Return relative to maximum drawdown	2.45	3.04	-0.58
Martin ratio: Return relative to average drawdown	7.83	10.16	-2.33

MCSIX vs. BCSKX - Sharpe Ratio Comparison

The current MCSIX Sharpe Ratio is 1.90, which is comparable to the BCSKX Sharpe Ratio of 2.35. The chart below compares the historical Sharpe Ratios of MCSIX and BCSKX, 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

MCSIX vs. BCSKX - Drawdown Comparison

The maximum MCSIX drawdown since its inception was -64.20%, which is greater than BCSKX's maximum drawdown of -30.34%. Use the drawdown chart below to compare losses from any high point for MCSIX and BCSKX.

Drawdown Indicators

	MCSIX	BCSKX	Difference
Max Drawdown Largest peak-to-trough decline	-64.20%	-30.34%	-33.86%
Max Drawdown (1Y) Largest decline over 1 year	-12.69%	-11.62%	-1.07%
Max Drawdown (3Y) Largest decline over 3 years	-12.69%	-11.62%	-1.07%
Max Drawdown (5Y) Largest decline over 5 years	-37.61%	-22.34%	-15.27%
Max Drawdown (10Y) Largest decline over 10 years	-37.61%	—	—
Current Drawdown Current decline from peak	-6.88%	-4.72%	-2.16%
Average Drawdown Average peak-to-trough decline	-33.02%	-6.58%	-26.44%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.00%	3.47%	+0.53%

Volatility

MCSIX vs. BCSKX - Volatility Comparison

MFS Commodity Strategy Fund (MCSIX) has a higher volatility of 4.40% compared to BlackRock Commodity Strategies Fund Class K (BCSKX) at 3.20%. This indicates that MCSIX's price experiences larger fluctuations and is considered to be riskier than BCSKX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MCSIX	BCSKX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.40%	3.20%	+1.20%
Volatility (6M) Calculated over the trailing 6-month period	13.12%	11.67%	+1.45%
Volatility (1Y) Calculated over the trailing 1-year period	16.38%	15.06%	+1.32%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	34.63%	15.71%	+18.92%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	26.03%	15.02%	+11.01%

MCSIX vs. BCSKX - Expense Ratio Comparison

MCSIX has a 0.90% expense ratio, which is higher than BCSKX's 0.67% expense ratio.

Dividends

MCSIX vs. BCSKX - Dividend Comparison

MCSIX's dividend yield for the trailing twelve months is around 13.41%, less than BCSKX's 14.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BCSKX BlackRock Commodity Strategies Fund Class K	14.54%	3.13%	3.66%	9.45%	9.11%	2.72%	0.84%	2.08%	2.02%	0.00%	0.00%	0.00%
MCSIX MFS Commodity Strategy Fund	13.41%	16.04%	3.30%	2.21%	27.42%	56.01%	0.88%	1.87%	3.50%	3.14%	0.61%	0.47%

Frequently Asked Questions

Can I hold both MCSIX and BCSKX in my portfolio?

MCSIX and BCSKX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MCSIX or BCSKX?

MCSIX has higher volatility (4.40%) compared to BCSKX (3.20%). In terms of maximum drawdown, MCSIX dropped -64.20% vs BCSKX's -30.34%.

Which has better risk-adjusted returns?

BCSKX currently has the higher Sharpe Ratio (2.35 vs 1.90), 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.