Data as of Oct 28, 2026.
IYW vs MGK: Differences, Returns & Fees
Over the year to Oct 28, 2026, IYW returned +23.2% to MGK's +7.8%; 66% of their weight is in the same names.
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Net assets: $25.0bn on Oct 27, 2026 for iShares U.S. Technology ETF, and $34.9bn on Sep 30, 2026 for Vanguard Morningstar Mega Cap Growth ETF.
Pair scorecard
MGK costs 0.32 points a year less; their one-year returns differ by 15.4 points; MGK is 1.3 times larger.
| Measure | IYW | MGK |
|---|---|---|
| Return | ||
| Total return, 1 year | +23.2% | +7.8% |
| Drawdown | ||
| Below its high | 5.5%, high on Oct 6, 2026 | 4.4%, high on Oct 6, 2026 |
| Benchmark | ||
| What it tracks | Russell 1000 Technology RIC 22 | Morningstar US Mega Cap Growth Index |
| Cost and size | ||
| Expense ratio | 0.37% | 0.05% |
| Net assets, as of Sep 30, 2026 | $26.5bn | $34.9bn |
| Holdings | ||
| Holdings in common | 66% | |
| Top ten holdings, share of the fund | 65.1% | 64.5% |
Holdings in common uses holdings dated Sep 30, 2026 and Oct 27, 2026. Method
Risk and return
Jan 4, 2008 to Oct 23, 2026 · 981 weekly returnsIYW returned more: +1,847.3% to +1,024.1%. MGK swung less: 19.5% to 22.2%. IYW and MGK fell about the same at their worst: −47.3% and −46.4%.
Full scorecard
9 measures, with how each is measured Open ↓
| Measure | IYW | MGK | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +1,847.3% | +1,024.1% | IYW | Price change plus distributions, reinvested. |
| Annualized | +17.0% | +13.7% | IYW | Total return as a yearly rate. |
| Price return | +1,612.4% | +823.8% | IYW | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 22.2% | 19.5% | MGK | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 14.8% | 13.3% | MGK | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −47.3% | −46.4% | Tie | Deepest fall from a high to the low after it. |
| Risk-adjusted | ||||
| Sharpe | 0.76 | 0.68 | IYW (slight) | Return above Treasury bills per unit of volatility. |
| Sortino | 1.13 | 1.00 | IYW | Return above Treasury bills per unit of downside deviation. |
| Calmar | 0.36 | 0.30 | IYW | Annualized return divided by the max drawdown. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 981 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IYW and MGK hold 66% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 27, 2026.
half
66% in common
Only in one fund ↓
Side by side
IYW and MGK on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IYW and MGK do different jobs. What does each one do in a portfolio?
- What each follows. IYW follows Russell 1000 Technology RIC 22 and MGK follows Morningstar US Mega Cap Growth Index.
- One-year total return. Over 1 year to Oct 28, 2026 IYW returned +23.2% and MGK +7.8% with distributions reinvested, a gap of 15.4 points.
- Cost. IYW charges 0.37% of assets a year and MGK 0.05%, a gap of 0.32 points.
Data as of Oct 28, 2026.
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IYW
IYW tracks an index of U.S. Technology. Over the year to Oct 28, 2026 it returned +23.2% with distributions reinvested, against +13.1% for its benchmark, the Russell 1000 Index. The prospectus expense ratio is 0.37% a year. By its holdings published by its issuer for Oct 27, 2026, 94% of the fund by weight is stocks the S&P 500 also holds, across 150 positions, with the top ten at 65.1%. It sat 5.5% below its high of Oct 6, 2026 on Oct 28, 2026.
MGK
MGK tracks an index of Mega Cap Growth. Over the year to Oct 28, 2026 it returned +7.8% with distributions reinvested. The prospectus expense ratio is 0.05% a year. By its holdings published by its issuer as of Sep 30, 2026, 99% of the fund by weight is stocks the S&P 500 also holds, across 54 positions, with the top ten at 64.5%. It sat 4.4% below its high of Oct 6, 2026 on Oct 28, 2026.
Questions people ask
- Which returned more over the last year, IYW or MGK?
- In the year to Oct 28, 2026, with distributions reinvested, IYW returned +23.2% and MGK +7.8%.
- Which is cheaper, IYW or MGK?
- MGK is cheaper, by 0.32 percentage points a year. That is about $32 on $10,000 held for a year. Fees come from each fund's prospectus.
Links are sources, not endorsements. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, IYW against MGK, data as of Oct 28, 2026. https://etfiq.com/compare/any/iyw-vs-mgk
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