MGK vs. AXP

Last updated Jul 2, 2026

MGK (Vanguard Mega Cap Growth ETF) is Large Cap Growth Equities fund tracking the CRSP US Mega Cap Growth Index, while AXP (American Express Company) is a stock. Over the past 10 years, MGK returned 18.92%/yr vs 20.70%/yr for AXP. A 0.60 correlation means they provide meaningful diversification when combined.

Performance

MGK vs. AXP - Performance Comparison

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

Returns By Period

In the year-to-date period, MGK achieves a 6.69% return, which is significantly higher than AXP's -5.43% return. Over the past 10 years, MGK has underperformed AXP with an annualized return of 18.92%, while AXP has yielded a comparatively higher 20.70% annualized return.

MGK

• 1D: 0.00%
• 1M: -4.41%
• YTD: 6.69%
• 6M: 6.69%
• 1Y: 21.76%
• 3Y*: 23.71%
• 5Y*: 13.92%
• 10Y*: 18.92%

AXP

• 1D: 2.88%
• 1M: 10.99%
• YTD: -5.43%
• 6M: -5.43%
• 1Y: 9.03%
• 3Y*: 27.44%
• 5Y*: 16.96%
• 10Y*: 20.70%

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

MGK vs. AXP - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGK Vanguard Mega Cap Growth ETF	6.69%	20.67%	32.94%	51.67%	-33.59%	28.58%	41.01%	37.38%	-2.91%	29.49%
AXP American Express Company	-5.43%	25.99%	60.32%	28.67%	-8.52%	36.88%	-1.14%	32.52%	-2.62%	36.22%

Correlation

The correlation between MGK and AXP is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.35
Correlation (3Y) Calculated over the trailing 3-year period	0.45
Correlation (5Y) Calculated over the trailing 5-year period	0.54
Correlation (10Y) Calculated over the trailing 10-year period	0.52
Correlation (All Time) Calculated using the full available price history since Dec 27, 2007	0.60

Over the past year, the correlation between MGK and AXP has dropped to 0.34 - well below their long-term average of 0.60, suggesting their price drivers have been diverging.

Return for Risk

MGK vs. AXP — Risk / Return Rank

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

MGK

MGK Risk / Return Rank: 36
MGK Sharpe Ratio Rank: 39
MGK Sortino Ratio Rank: 38
MGK Omega Ratio Rank: 38
MGK Calmar Ratio Rank: 29
MGK Martin Ratio Rank: 33

AXP

AXP Risk / Return Rank: 52
AXP Sharpe Ratio Rank: 56
AXP Sortino Ratio Rank: 48
AXP Omega Ratio Rank: 48
AXP Calmar Ratio Rank: 53
AXP Martin Ratio Rank: 53

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.

MGK vs. AXP - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mega Cap Growth ETF (MGK) and American Express Company (AXP). 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.

	MGK	AXP	Difference
Sharpe ratio: Return per unit of total volatility	1.25	0.35	+0.91
Sortino ratio: Return per unit of downside risk	1.77	0.64	+1.13
Omega ratio: Gain probability vs. loss probability	1.22	1.08	+0.14
Calmar ratio: Return relative to maximum drawdown	1.30	0.38	+0.92
Martin ratio: Return relative to average drawdown	4.25	0.79	+3.46

MGK vs. AXP - Sharpe Ratio Comparison

The current MGK Sharpe Ratio is 1.25, which is higher than the AXP Sharpe Ratio of 0.35. The chart below compares the historical Sharpe Ratios of MGK and AXP, 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

MGK vs. AXP - Drawdown Comparison

The maximum MGK drawdown since its inception was -48.43%, smaller than the maximum AXP drawdown of -83.91%. Use the drawdown chart below to compare losses from any high point for MGK and AXP.

Drawdown Indicators

	MGK	AXP	Difference
Max Drawdown Largest peak-to-trough decline	-48.43%	-83.91%	+35.48%
Max Drawdown (1Y) Largest decline over 1 year	-16.85%	-23.90%	+7.05%
Max Drawdown (3Y) Largest decline over 3 years	-23.36%	-28.76%	+5.40%
Max Drawdown (5Y) Largest decline over 5 years	-36.01%	-31.55%	-4.46%
Max Drawdown (10Y) Largest decline over 10 years	-36.01%	-49.64%	+13.63%
Current Drawdown Current decline from peak	-4.41%	-9.10%	+4.69%
Average Drawdown Average peak-to-trough decline	-7.58%	-22.04%	+14.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.13%	11.41%	-6.28%

Volatility

MGK vs. AXP - Volatility Comparison

Vanguard Mega Cap Growth ETF (MGK) and American Express Company (AXP) have volatilities of 7.58% and 7.92%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGK	AXP	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.58%	7.92%	-0.34%
Volatility (6M) Calculated over the trailing 6-month period	14.01%	20.30%	-6.29%
Volatility (1Y) Calculated over the trailing 1-year period	17.49%	26.29%	-8.80%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.84%	29.46%	-6.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.95%	31.75%	-9.80%

Dividends

MGK vs. AXP - Dividend Comparison

MGK's dividend yield for the trailing twelve months is around 0.33%, less than AXP's 0.98% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AXP American Express Company	0.98%	0.85%	0.91%	1.24%	1.35%	1.05%	1.42%	1.29%	1.51%	1.32%	1.61%	1.58%
MGK Vanguard Mega Cap Growth ETF	0.33%	0.35%	0.43%	0.50%	0.70%	0.41%	0.65%	0.85%	1.12%	1.23%	1.53%	1.43%

Frequently Asked Questions

Can I hold both MGK and AXP in my portfolio?

MGK and AXP have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MGK or AXP?

AXP has higher volatility (7.92%) compared to MGK (7.58%). In terms of maximum drawdown, MGK dropped -48.43% vs AXP's -83.91%.

Which has better risk-adjusted returns?

MGK currently has the higher Sharpe Ratio (1.25 vs 0.35), 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.