MGC vs. IWY

Last updated Jun 24, 2026

MGC (Vanguard Mega Cap ETF) and IWY (iShares Russell Top 200 Growth ETF) are both exchange-traded funds - MGC is a Large Cap Blend Equities fund tracking the CRSP US Mega Cap Index, while IWY is a Large Cap Growth Equities fund tracking the Russell Top 200 Growth Index. Both are passively managed. Over the past 10 years, MGC returned 16.33%/yr vs 19.34%/yr for IWY. Their correlation of 0.94 suggests significant overlap in exposure. MGC charges 0.05%/yr vs 0.20%/yr for IWY.

Performance

MGC vs. IWY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Mega Cap ETF (MGC) and iShares Russell Top 200 Growth ETF (IWY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MGC achieves a 7.43% return, which is significantly higher than IWY's 1.47% return. Over the past 10 years, MGC has underperformed IWY with an annualized return of 16.33%, while IWY has yielded a comparatively higher 19.34% annualized return.

MGC

• 1D: -1.49%
• 1M: -1.89%
• YTD: 7.43%
• 6M: 6.54%
• 1Y: 24.48%
• 3Y*: 21.92%
• 5Y*: 13.65%
• 10Y*: 16.33%

IWY

• 1D: -1.59%
• 1M: -4.29%
• YTD: 1.47%
• 6M: 0.28%
• 1Y: 19.00%
• 3Y*: 22.32%
• 5Y*: 14.18%
• 10Y*: 19.34%

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

MGC vs. IWY - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGC Vanguard Mega Cap ETF	7.43%	19.31%	27.16%	29.77%	-19.95%	27.58%	21.57%	31.14%	-3.45%	22.61%
IWY iShares Russell Top 200 Growth ETF	1.47%	18.19%	34.89%	46.49%	-29.91%	31.05%	39.01%	36.20%	-0.72%	31.69%

Correlation

The correlation between MGC and IWY is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Sep 28, 2009	0.94

The correlation between MGC and IWY has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.

MGC vs. IWY - Sectors Allocation Comparison

Sectors	MGC	IWY
Technology	42.9%	56.9%
Communication Services	12.3%	12.6%
Financial Services	10.9%	5.3%
Consumer Cyclical	9.8%	10.5%
Healthcare	8.6%	6.7%
Industrials	6.0%	3.3%
Consumer Defensive	4.4%	2.8%
Energy	2.3%	0.0%
Basic Materials	1.1%	0.3%
Real Estate	0.9%	0.3%
Utilities	0.9%	1.1%

Return for Risk

MGC vs. IWY — Risk / Return Rank

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

MGC

MGC Risk / Return Rank: 57
MGC Sharpe Ratio Rank: 58
MGC Sortino Ratio Rank: 55
MGC Omega Ratio Rank: 57
MGC Calmar Ratio Rank: 52
MGC Martin Ratio Rank: 62

IWY

IWY Risk / Return Rank: 30
IWY Sharpe Ratio Rank: 34
IWY Sortino Ratio Rank: 32
IWY Omega Ratio Rank: 32
IWY Calmar Ratio Rank: 24
IWY Martin Ratio Rank: 28

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.

MGC vs. IWY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mega Cap ETF (MGC) and iShares Russell Top 200 Growth ETF (IWY). 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.

	MGC	IWY	Difference
Sharpe ratio: Return per unit of total volatility	1.88	1.17	+0.71
Sortino ratio: Return per unit of downside risk	2.56	1.65	+0.91
Omega ratio: Gain probability vs. loss probability	1.34	1.21	+0.13
Calmar ratio: Return relative to maximum drawdown	2.50	1.15	+1.35
Martin ratio: Return relative to average drawdown	10.77	3.65	+7.12

MGC vs. IWY - Sharpe Ratio Comparison

The current MGC Sharpe Ratio is 1.88, which is higher than the IWY Sharpe Ratio of 1.17. The chart below compares the historical Sharpe Ratios of MGC and IWY, 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

MGC vs. IWY - Drawdown Comparison

The maximum MGC drawdown since its inception was -52.26%, which is greater than IWY's maximum drawdown of -32.68%. Use the drawdown chart below to compare losses from any high point for MGC and IWY.

Drawdown Indicators

	MGC	IWY	Difference
Max Drawdown Largest peak-to-trough decline	-52.26%	-32.68%	-19.58%
Max Drawdown (1Y) Largest decline over 1 year	-9.85%	-16.63%	+6.78%
Max Drawdown (3Y) Largest decline over 3 years	-19.28%	-23.22%	+3.94%
Max Drawdown (5Y) Largest decline over 5 years	-25.74%	-32.68%	+6.94%
Max Drawdown (10Y) Largest decline over 10 years	-33.07%	-32.68%	-0.39%
Current Drawdown Current decline from peak	-3.81%	-7.07%	+3.26%
Average Drawdown Average peak-to-trough decline	-7.17%	-4.75%	-2.42%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.28%	5.22%	-2.94%

Volatility

MGC vs. IWY - Volatility Comparison

The current volatility for Vanguard Mega Cap ETF (MGC) is 5.22%, while iShares Russell Top 200 Growth ETF (IWY) has a volatility of 6.08%. This indicates that MGC experiences smaller price fluctuations and is considered to be less risky than IWY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGC	IWY	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.22%	6.08%	-0.86%
Volatility (6M) Calculated over the trailing 6-month period	10.32%	12.61%	-2.29%
Volatility (1Y) Calculated over the trailing 1-year period	13.08%	16.30%	-3.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.39%	21.60%	-4.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.24%	21.03%	-2.79%

MGC vs. IWY - Expense Ratio Comparison

MGC has a 0.05% expense ratio, which is lower than IWY's 0.20% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

MGC vs. IWY - Dividend Comparison

MGC's dividend yield for the trailing twelve months is around 0.90%, more than IWY's 0.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IWY iShares Russell Top 200 Growth ETF	0.36%	0.36%	0.42%	0.68%	0.88%	0.50%	0.71%	1.06%	1.32%	1.26%	1.51%	1.58%
MGC Vanguard Mega Cap ETF	0.90%	0.93%	1.15%	1.35%	1.65%	1.17%	1.45%	1.81%	2.10%	1.83%	2.14%	2.11%

Frequently Asked Questions

Can I hold both MGC and IWY in my portfolio?

With a correlation of 0.95, MGC and IWY 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, MGC or IWY?

IWY has higher volatility (6.08%) compared to MGC (5.22%). In terms of maximum drawdown, MGC dropped -52.26% vs IWY's -32.68%.

Which ETF is better, MGC or IWY?

On 10-year performance, IWY leads with 19.34% vs 16.33% for MGC. On fees, MGC is cheaper at 0.05% per year. On volatility, MGC has been the lower-risk option at 5.22%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, MGC or IWY?

Over the 10-year period, IWY has performed better with a 19.34% return vs 16.33%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MGC or IWY?

MGC is cheaper with a 0.05% expense ratio, compared with 0.20% for IWY.

Which ETF pays a higher dividend yield, MGC or IWY?

MGC has the higher dividend yield at 0.90%, compared with 0.36% for IWY.

What is the main difference between MGC and IWY?

MGC is categorized as Large Cap Blend Equities, while IWY is Large Cap Growth Equities. MGC tracks CRSP US Mega Cap Index, while IWY tracks Russell Top 200 Growth Index. They also come from different issuers: Vanguard and iShares. Their fees differ too: 0.05% for MGC and 0.20% for IWY.

Which has better risk-adjusted returns?

MGC currently has the higher Sharpe Ratio (1.88 vs 1.17), 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.