Data as of Oct 28, 2026.
IWF vs MUB: Differences, Returns & Fees
Over the year to Oct 28, 2026, IWF returned +0.9% to MUB's −0.4%; 0% of their weight is in the same names.
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Net assets on Oct 27, 2026: $124.7bn for iShares Russell 1000 Growth ETF and $54.1bn for iShares National Muni Bond ETF.
Pair scorecard
MUB costs 0.13 points a year less; their one-year returns differ by 1.3 points; IWF is 2.3 times larger.
| Measure | IWF | MUB |
|---|---|---|
| Return | ||
| Total return, 1 year | +0.9% | −0.4% |
| Drawdown | ||
| Below its high | 4.8%, high on Oct 6, 2026 | |
| Benchmark | ||
| What it tracks | Russell 1000 Growth Index | ICE AMT-Free US National Municipal Index |
| Cost and size | ||
| Expense ratio | 0.18% | 0.05% |
| Net assets, as of Oct 27, 2026 | $124.7bn | $54.1bn |
| Holdings | ||
| Holdings in common | 0% | |
| In the S&P 500, by weight | 94% | |
| Top ten holdings, share of the fund | 57.5% | |
Holdings in common uses holdings dated Oct 27, 2026. Method
Risk and return
Sep 21, 2007 to Oct 23, 2026 · 996 weekly returnsIWF returned more: +867.6% to +76.1%. MUB swung less: 6.5% to 19.3%. MUB fell less at its worst: −12.4% to −50.4%.
Full scorecard
9 measures, with how each is measured Open ↓
| Measure | IWF | MUB | Edge | How it is measured |
|---|---|---|---|---|
| Return | ||||
| Total return | +867.6% | +76.1% | IWF | Price change plus distributions, reinvested. |
| Annualized | +12.6% | +3.0% | IWF | Total return as a yearly rate. |
| Price return | +683.0% | +3.4% | IWF | Price change alone, distributions left out. |
| Risk | ||||
| Volatility | 19.3% | 6.5% | MUB | Spread of weekly returns, annualized. Lower is steadier. |
| Downside deviation | 13.3% | 4.7% | MUB | Like volatility, counting only weeks below the Treasury bill rate. |
| Max drawdown | −50.4% | −12.4% | MUB | Deepest fall from a high to the low after it. |
| Risk-adjusted | ||||
| Sharpe | 0.63 | 0.26 | IWF | Return above Treasury bills per unit of volatility. |
| Sortino | 0.92 | 0.36 | IWF | Return above Treasury bills per unit of downside deviation. |
| Calmar | 0.25 | 0.24 | IWF (slight) | Annualized return divided by the max drawdown. |
Computed by ETFIQ from Tiingo daily prices and ETFIQ's distribution records, 996 weekly returns. Cash rate: the 13-week Treasury bill.
What they share
By the books each fund has filed, IWF and MUB hold 0% of their money in the same securities at the same weight. Holdings dated Oct 27, 2026.
half
0% in common
Only in one fund ↓
Side by side
IWF and MUB on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
IWF and MUB do different jobs. What does each one do in a portfolio?
- What each follows. IWF follows Russell 1000 Growth Index and MUB follows ICE AMT-Free US National Municipal Index.
- Holdings in common. 0% of the weight is in the same securities (holdings dated Oct 27, 2026).
- Number of holdings. IWF holds 374 positions and MUB holds 7873.
Data as of Oct 28, 2026.
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IWF
IWF tracks the Russell 1000 growth. Over the year to Oct 28, 2026 it returned +0.9% with distributions reinvested, against +1.1% for its benchmark, the Russell 1000 Growth Index. The prospectus expense ratio is 0.18% 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 374 positions, with the top ten at 57.5%. It sat 4.8% below its high of Oct 6, 2026 on Oct 28, 2026.
MUB
MUB tracks an index of National Muni Bond. Over the year to Oct 28, 2026 it returned −0.4% with distributions reinvested. The prospectus expense ratio is 0.05% a year.
Questions people ask
- Which returned more over the last year, IWF or MUB?
- In the year to Oct 28, 2026, with distributions reinvested, IWF returned +0.9% and MUB −0.4%.
- Which is cheaper, IWF or MUB?
- MUB is cheaper, by 0.13 percentage points a year. That is about $13 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.
Cite this pageCitation, APA and Markdown
ETFIQ, IWF against MUB, data as of Oct 28, 2026. https://etfiq.com/compare/any/iwf-vs-mub
ETFIQ. (Oct 28, 2026). IWF against MUB. Retrieved from https://etfiq.com/compare/any/iwf-vs-mub
[IWF against MUB (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/iwf-vs-mub)
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