IWYvsMGKETF Comparison
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iShares Russell Top 200 Growth ETF (IWY) and Vanguard Mega Cap Growth ETF (MGK) belong to the same industry segment: US Large Cap Growth. Both ETFs have the same top 3 sector exposures: Information Technology, Communication Services and Consumer Discretionary. IWY is more expensive with a Total Expense Ratio (TER) of 0.2%, versus 0.05% for MGK. IWY is up 1.32% year-to-date (YTD) with +$144M in YTD flows. MGK performs better with 2.14% YTD performance, and -$937M in YTD flows. Run a side-by-side ETF comparison of IWY and MGK below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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IWY vs MGK performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 04/24/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IWY MGK | +11.95%+13.59% | +1.99%+2.75% | +1.32%+2.14% | +34.19%+36.87% | +105.23%+109.58% | +99.14%+93.02% |
| Flows | IWY MGK | -$6M+$251M | -$131M-$432M | +$144M-$937M | +$718M+$1.15B | +$3.17B+$5.35B | +$5.69B+$7.73B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IWY MGK | +20.35%+21.24% | +16.30%+16.92% | +19.53%+20.00% | +21.64%+22.79% |
| Max drawdown | IWY MGK | -13.33%-14.37% | -16.56%-16.79% | -23.25%-23.44% | -32.74%-36.04% |
| Max drawdown duration | IWY MGK | 79d79d | 177d177d | 192d124d | 715d745d |
Trading data
IWY | MGK | |
Last sale 4/27/2026 at 1:30 PM | $280.96 | $84.45 |
| Previous close 04/24/2026 | $280.30 | $84.26 |
| Consolidated volume 04/24/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of March 31, 2026
1-year trailing difference
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IWY | MGK | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 4/27/2026 at 1:30 PM
Live
Closed
IWY | MGK | |
|---|---|---|
| Last price | $280.96 | $84.45 |
| 1D performance | +0.24% | +0.23% |
| AuM | $16.55 B | $32.02 B |
| E/R | 0.2% | 0.05% |
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Exposure
Countries
IWY
USA
98.74%
Other
1.26%
MGK
USA
99.63%
Other
0.37%
Sectors
IWY
Information Techn.
56.02%
Communication Ser.
12.6%
Consumer Discreti.
11.3%
Health Care
7.47%
Other
12.62%
MGK
Information Techn.
55.93%
Communication Ser.
16.17%
Consumer Discreti.
13.06%
Other
14.85%
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Diversification
IWY
Total weight of top 15 holdings out of 15
72.51%
MGK
Total weight of top 15 holdings out of 15
74%
Top 15 holdings
Data as of March 31, 2026
IWY
NVIDIA
14.62%
APPLE
13.13%
MICROSOFT-T
9.91%
AMAZON.COM INC
4.46%
BROADCOM LIMITED
4.31%
ALPHABET INC-CL
3.93%
TESLA
3.52%
META PLATFORMS
3.42%
ALPHABET INC-CL
3.20%
LILLY
2.88%
VISA INCORPORATION
2.16%
COSTCO WHOLESALE
1.88%
NETFLIX
1.73%
MASTERCARD
1.71%
ABBVIE
1.64%
MGK
NVIDIA
13.72%
APPLE
12.58%
MICROSOFT-T
9.00%
ALPHABET INC-CL
5.50%
AMAZON.COM INC
4.59%
BROADCOM LIMITED
4.40%
ALPHABET INC-CL
4.36%
TESLA
4.18%
META PLATFORMS
4.16%
LILLY
3.17%
VISA INCORPORATION
1.96%
NETFLIX
1.75%
MASTERCARD
1.72%
ADVANCED MICRO DEVICES
1.49%
PALANTIR TECHNOLOGIES
1.41%
Frequently asked questions about IWY and MGK
How have the IWY and MGK ETFs performed in 2026?
As of April 24, 2026, IWY is up 1.32% year-to-date (YTD), while MGK has returned 2.14%. That puts MGK better performer ahead so far this year.
Which ETF is attracting more investor money: IWY or MGK?
Year-to-date, the IWY ETF saw +$144M in flows, compared to -$937M for MGK.
Which ETF is more volatile: IWY or MGK?
Over the past year, IWY had a volatility of 16.3%, while MGK experienced 16.92%.
Which ETF is bigger: IWY or MGK?
As of April 24, 2026, IWY holds $16.55 B in assets under management (AUM), while MGK manages $32.02 B.
What sectors do the IWY and MGK ETFs invest in?
IWY leans toward sectors like Information Technology, Communication Services and Consumer Discretionary. Meanwhile, MGK focuses on Information Technology, Communication Services and Consumer Discretionary.
What are the top holdings of the IWY ETF and MGK ETF?
IWY top holdings include NVIDIA, APPLE and MICROSOFT-T. MGK holds in its top three: NVIDIA, APPLE and MICROSOFT-T.
Which ETF is more diversified: IWY or MGK?
IWY holds 111 securities with 72.51% of its assets in the top 15. MGK has 59 securities and a top 15 weight of 74%.
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