MGK vs. ITOT

Last updated Apr 2, 2026

Compare and contrast key facts about Vanguard Mega Cap Growth ETF (MGK) and iShares Core S&P Total U.S. Stock Market ETF (ITOT).

MGK and ITOT are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. MGK is a passively managed fund by Vanguard that tracks the performance of the CRSP US Mega Cap Growth Index. It was launched on Dec 17, 2007. ITOT is a passively managed fund by iShares that tracks the performance of the S&P Composite 1500 Index. It was launched on Jan 20, 2004. Both MGK and ITOT are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

MGK vs. ITOT - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Mega Cap Growth ETF (MGK) and iShares Core S&P Total U.S. Stock Market ETF (ITOT). The values are adjusted to include any dividend payments, if applicable.

MGK vs. ITOT - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MGK Vanguard Mega Cap Growth ETF	-9.86%	20.67%	32.94%	51.67%	-33.59%	28.58%	41.01%	37.38%	-2.91%	29.49%
ITOT iShares Core S&P Total U.S. Stock Market ETF	-3.31%	17.00%	23.80%	26.12%	-19.47%	25.68%	20.71%	30.67%	-5.33%	21.37%

Returns By Period

In the year-to-date period, MGK achieves a -9.86% return, which is significantly lower than ITOT's -3.31% return. Over the past 10 years, MGK has outperformed ITOT with an annualized return of 16.97%, while ITOT has yielded a comparatively lower 13.65% annualized return.

MGK

• 1D: 1.17%
• 1M: -4.13%
• YTD: -9.86%
• 6M: -7.94%
• 1Y: 19.83%
• 3Y*: 22.59%
• 5Y*: 12.64%
• 10Y*: 16.97%

ITOT

• 1D: 0.72%
• 1M: -4.34%
• YTD: -3.31%
• 6M: -1.32%
• 1Y: 18.51%
• 3Y*: 18.11%
• 5Y*: 10.62%
• 10Y*: 13.65%

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

MGK vs. ITOT - Expense Ratio Comparison

MGK has a 0.05% expense ratio, which is higher than ITOT's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

MGK

Vanguard Mega Cap Growth ETF

ITOT

iShares Core S&P Total U.S. Stock Market ETF

Return for Risk

MGK vs. ITOT — Risk / Return Rank

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

MGK

MGK Risk / Return Rank: 46
MGK Sharpe Ratio Rank: 45
MGK Sortino Ratio Rank: 50
MGK Omega Ratio Rank: 48
MGK Calmar Ratio Rank: 45
MGK Martin Ratio Rank: 44

ITOT

ITOT Risk / Return Rank: 59
ITOT Sharpe Ratio Rank: 53
ITOT Sortino Ratio Rank: 57
ITOT Omega Ratio Rank: 60
ITOT Calmar Ratio Rank: 58
ITOT Martin Ratio Rank: 69

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. ITOT - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Mega Cap Growth ETF (MGK) and iShares Core S&P Total U.S. Stock Market ETF (ITOT). 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.

	MGK	ITOT	Difference
Sharpe ratio Return per unit of total volatility	0.85	1.00	-0.14
Sortino ratio Return per unit of downside risk	1.39	1.52	-0.13
Omega ratio Gain probability vs. loss probability	1.19	1.23	-0.04
Calmar ratio Return relative to maximum drawdown	1.23	1.53	-0.30
Martin ratio Return relative to average drawdown	4.27	7.25	-2.98
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MGK vs. ITOT - Sharpe Ratio Comparison

The current MGK Sharpe Ratio is 0.85, which is comparable to the ITOT Sharpe Ratio of 1.00. The chart below compares the historical Sharpe Ratios of MGK and ITOT, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	MGK	ITOT	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.85	1.00	-0.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.56	0.61	-0.05
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.78	0.75	+0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.54	+0.06

Correlation

The correlation between MGK and ITOT is 0.93, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

MGK vs. ITOT - Dividend Comparison

MGK's dividend yield for the trailing twelve months is around 0.39%, less than ITOT's 1.12% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MGK Vanguard Mega Cap Growth ETF	0.39%	0.35%	0.43%	0.50%	0.70%	0.41%	0.65%	0.85%	1.12%	1.23%	1.53%	1.43%
ITOT iShares Core S&P Total U.S. Stock Market ETF	1.12%	1.11%	1.23%	1.47%	1.66%	1.18%	1.41%	1.88%	2.14%	1.69%	1.83%	2.01%

Drawdowns

MGK vs. ITOT - Drawdown Comparison

The maximum MGK drawdown since its inception was -47.97%, smaller than the maximum ITOT drawdown of -55.20%. Use the drawdown chart below to compare losses from any high point for MGK and ITOT.

Drawdown Indicators

	MGK	ITOT	Difference
Max Drawdown Largest peak-to-trough decline	-47.97%	-55.20%	+7.23%
Max Drawdown (1Y) Largest decline over 1 year	-16.85%	-12.34%	-4.51%
Max Drawdown (5Y) Largest decline over 5 years	-36.01%	-25.36%	-10.65%
Max Drawdown (10Y) Largest decline over 10 years	-36.01%	-35.00%	-1.01%
Current Drawdown Current decline from peak	-12.56%	-5.51%	-7.05%
Average Drawdown Average peak-to-trough decline	-7.51%	-7.02%	-0.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.87%	2.61%	+2.26%

Volatility

MGK vs. ITOT - Volatility Comparison

Vanguard Mega Cap Growth ETF (MGK) has a higher volatility of 7.13% compared to iShares Core S&P Total U.S. Stock Market ETF (ITOT) at 5.49%. This indicates that MGK's price experiences larger fluctuations and is considered to be riskier than ITOT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MGK	ITOT	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.13%	5.49%	+1.64%
Volatility (6M) Calculated over the trailing 6-month period	12.93%	9.78%	+3.15%
Volatility (1Y) Calculated over the trailing 1-year period	23.35%	18.68%	+4.67%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.63%	17.36%	+5.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.82%	18.25%	+3.57%