MTCIX vs. MGK

Last updated Jun 4, 2026

MTCIX (MFS Technology Fund) and MGK (Vanguard Mega Cap Growth ETF) are both funds - MTCIX is a Technology Equities fund managed by MFS, while MGK is a Large Cap Growth Equities fund tracking the CRSP US Mega Cap Growth Index. Over the past 10 years, MTCIX returned 22.51%/yr vs 19.24%/yr for MGK. Their correlation of 0.93 suggests significant overlap in exposure. MTCIX charges 0.88%/yr vs 0.05%/yr for MGK.

Performance

MTCIX vs. MGK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Technology Fund (MTCIX) and Vanguard Mega Cap Growth ETF (MGK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MTCIX achieves a 22.51% return, which is significantly higher than MGK's 10.01% return. Over the past 10 years, MTCIX has outperformed MGK with an annualized return of 22.51%, while MGK has yielded a comparatively lower 19.24% annualized return.

MTCIX

• 1D: 0.78%
• 1M: 14.71%
• YTD: 22.51%
• 6M: 20.37%
• 1Y: 43.81%
• 3Y*: 38.82%
• 5Y*: 19.59%
• 10Y*: 22.51%

MGK

• 1D: -1.13%
• 1M: 7.26%
• YTD: 10.01%
• 6M: 9.45%
• 1Y: 30.01%
• 3Y*: 26.77%
• 5Y*: 16.25%
• 10Y*: 19.24%

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

MTCIX vs. MGK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MTCIX MFS Technology Fund	22.51%	16.39%	56.76%	54.42%	-36.18%	14.11%	46.45%	38.84%	1.85%	38.78%
MGK Vanguard Mega Cap Growth ETF	10.01%	20.67%	32.94%	51.67%	-33.59%	28.58%	41.01%	37.38%	-2.91%	29.49%

Correlation

The correlation between MTCIX and MGK is 0.92, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Dec 28, 2007	0.93

The correlation between MTCIX and MGK has been stable across timeframes, ranging from 0.92 to 0.95 - a consistent structural relationship.

Return for Risk

MTCIX vs. MGK — Risk / Return Rank

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

MTCIX

MTCIX Risk / Return Rank: 44
MTCIX Sharpe Ratio Rank: 55
MTCIX Sortino Ratio Rank: 45
MTCIX Omega Ratio Rank: 45
MTCIX Calmar Ratio Rank: 40
MTCIX Martin Ratio Rank: 36

MGK

MGK Risk / Return Rank: 45
MGK Sharpe Ratio Rank: 53
MGK Sortino Ratio Rank: 50
MGK Omega Ratio Rank: 50
MGK Calmar Ratio Rank: 35
MGK Martin Ratio Rank: 38

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.

MTCIX vs. MGK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Technology Fund (MTCIX) and Vanguard Mega Cap Growth ETF (MGK). 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.

	MTCIX	MGK	Difference
Sharpe ratio: Return per unit of total volatility	2.19	1.86	+0.33
Sortino ratio: Return per unit of downside risk	2.83	2.53	+0.31
Omega ratio: Gain probability vs. loss probability	1.37	1.32	+0.05
Calmar ratio: Return relative to maximum drawdown	2.40	1.79	+0.62
Martin ratio: Return relative to average drawdown	7.94	6.15	+1.78
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MTCIX vs. MGK - Sharpe Ratio Comparison

The current MTCIX Sharpe Ratio is 2.19, which is comparable to the MGK Sharpe Ratio of 1.86. The chart below compares the historical Sharpe Ratios of MTCIX and MGK, 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

	MTCIX	MGK	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.19	1.86	+0.33
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.77	0.72	+0.05
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.94	0.88	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.66	-0.26

Drawdowns

MTCIX vs. MGK - Drawdown Comparison

The maximum MTCIX drawdown since its inception was -82.78%, which is greater than MGK's maximum drawdown of -47.97%. Use the drawdown chart below to compare losses from any high point for MTCIX and MGK.

Drawdown Indicators

	MTCIX	MGK	Difference
Max Drawdown Largest peak-to-trough decline	-82.78%	-47.97%	-34.81%
Max Drawdown (1Y) Largest decline over 1 year	-18.59%	-16.85%	-1.74%
Max Drawdown (3Y) Largest decline over 3 years	-25.97%	-23.36%	-2.61%
Max Drawdown (5Y) Largest decline over 5 years	-42.74%	-36.01%	-6.73%
Max Drawdown (10Y) Largest decline over 10 years	-42.74%	-36.01%	-6.73%
Current Drawdown Current decline from peak	0.00%	-1.43%	+1.43%
Average Drawdown Average peak-to-trough decline	-29.86%	-7.47%	-22.39%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.62%	4.89%	+0.73%

Volatility

MTCIX vs. MGK - Volatility Comparison

MFS Technology Fund (MTCIX) has a higher volatility of 5.47% compared to Vanguard Mega Cap Growth ETF (MGK) at 4.01%. This indicates that MTCIX's price experiences larger fluctuations and is considered to be riskier than MGK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MTCIX	MGK	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.47%	4.01%	+1.46%
Volatility (6M) Calculated over the trailing 6-month period	16.28%	12.37%	+3.91%
Volatility (1Y) Calculated over the trailing 1-year period	20.44%	16.23%	+4.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	25.42%	22.63%	+2.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	24.06%	21.88%	+2.18%

MTCIX vs. MGK - Expense Ratio Comparison

MTCIX has a 0.88% expense ratio, which is higher than MGK's 0.05% expense ratio.

Dividends

MTCIX vs. MGK - Dividend Comparison

MTCIX's dividend yield for the trailing twelve months is around 11.19%, more than MGK's 0.32% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MGK Vanguard Mega Cap Growth ETF	0.32%	0.35%	0.43%	0.50%	0.70%	0.41%	0.65%	0.85%	1.12%	1.23%	1.53%	1.43%
MTCIX MFS Technology Fund	11.19%	13.71%	26.78%	9.66%	10.35%	11.58%	4.97%	3.87%	4.97%	3.51%	1.84%	3.62%

Frequently Asked Questions

Can I hold both MTCIX and MGK in my portfolio?

With a correlation of 0.92, MTCIX and MGK move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, MTCIX or MGK?

MTCIX has higher volatility (5.47%) compared to MGK (4.01%). In terms of maximum drawdown, MTCIX dropped -82.78% vs MGK's -47.97%.

Which has better risk-adjusted returns?

MTCIX currently has the higher Sharpe Ratio (2.19 vs 1.86), 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.