Expense Ratio
The annual fee the ETF charges, deducted daily from NAV. A 0.05% ratio costs you $5/year per $10,000 invested, over 30 years that's the difference between a great fund and a mediocre one.
Learn more →iShares National Muni Bond ETF
MUBBlackRock (iShares)Fixed Income
AI Agents
NAV
$107.19
Net Assets
-
Expense Ratio
0.05%
YTD
+1.11%
1Y
+4.07%
3Y CAGR
+2.58%
5Y CAGR
+0.85%
The underlying index includes municipal bonds, the interest of which is exempt from Federal income taxes and not subject to alternative minimum tax. The fund will invest at least 80% of its assets in the component securities of the underlying index and it will invest at least 90% of its assets in fixed income securities of the types included in the underlying index that BFA believes will help the fund track the underlying index.
Price History1,255 daily observations
Price History▲ 2.93% over 1Y
Returns PerformanceTrailing total returns
| YTD | 1Y | 3Y CAGR | 5Y CAGR |
|---|---|---|---|
| +1.11% | +4.07% | +2.58% | +0.85% |
Expense Ratio
Net (after waivers)0.05%
Gross (before waivers)0.05%
Net expense ratio reflects fee waivers and reimbursements actually paid by investors. Gross is the full management cost.
Sector Allocation1 sector
Fixed Income / Cash97.85%
Top 10 Holdings ConcentrationWhat share of the fund the largest 10 positions occupy
Top 10 Weight
1.5%
Total Holdings
918
Verdict
broadly diversified
Top Holdings200 of 918 loaded
💡Reading the Holdings Table
The Weight column shows how much of the ETF's assets sit in each constituent. The Allocation bar scales each weight to the largest position so you can see relative concentration at a glance, and the Cumul. column tracks the running total, a fast read on how top-heavy this ETF is. The top 10 holdings account for 1.5% of assets. Click any constituent name to open its US stock detail page.
📖 Learn: Diversification & Asset Allocation →| # | Holding | Sector | Allocation | Weight | Cumul. |
|---|---|---|---|---|---|
| 1 | UNIVERSITY TEX UNIV REVSUNIVERSITY TEX UNIV REVS | Fixed Income / Cash | 0.20% | 0.2% | |
| 2 | ATLANTA GA WTR & WASTE WTR REVATLANTA GA WTR & WASTE WTR REV | Fixed Income / Cash | 0.19% | 0.4% | |
| 3 | NEW YORK ST TWY AUTH ST PERS INEW YORK ST TWY AUTH ST PERS I | Fixed Income / Cash | 0.16% | 0.6% | |
| 4 | SAN ANTONIO TEX WTR REVSAN ANTONIO TEX WTR REV | Fixed Income / Cash | 0.15% | 0.7% | |
| 5 | NEW YORK ST DORM AUTH ST PERSNEW YORK ST DORM AUTH ST PERS | Fixed Income / Cash | 0.14% | 0.8% | |
| 6 | NEW YORK N Y CITY TRANSITIONALNEW YORK N Y CITY TRANSITIONAL | Fixed Income / Cash | 0.14% | 1.0% | |
| 7 | HOUSTON TEX HIGHER ED FIN CORPHOUSTON TEX HIGHER ED FIN CORP | Fixed Income / Cash | 0.14% | 1.1% | |
| 8 | TRIBOROUGH BRDG & TUNL AUTH NTRIBOROUGH BRDG & TUNL AUTH N | Fixed Income / Cash | 0.14% | 1.3% | |
| 9 | NORTHWEST TEX INDPT SCH DISTNORTHWEST TEX INDPT SCH DIST | Fixed Income / Cash | 0.13% | 1.4% | |
| 10 | CALIFORNIA STCALIFORNIA ST | Fixed Income / Cash | 0.13% | 1.5% | |
| 11 | WASHINGTON STWASHINGTON ST | Fixed Income / Cash | 0.13% | 1.6% | |
| 12 | OHIO ST UNIV GEN RCPTSOHIO ST UNIV GEN RCPTS | Fixed Income / Cash | 0.13% | 1.8% | |
| 13 | NEW JERSEY STNEW JERSEY ST | Fixed Income / Cash | 0.13% | 1.9% | |
| 14 | EAST CNTY ADVANCED WTR PURIFICEAST CNTY ADVANCED WTR PURIFIC | Fixed Income / Cash | 0.12% | 2.0% | |
| 15 | PENNSYLVANIA ST TPK COMMN TPKPENNSYLVANIA ST TPK COMMN TPK | Fixed Income / Cash | 0.12% | 2.1% | |
| 16 | CHICAGO ILL TRAN AUTH SALES TACHICAGO ILL TRAN AUTH SALES TA | Fixed Income / Cash | 0.12% | 2.3% | |
| 17 | ORLANDO FLA UTILS COMMN UTIL SORLANDO FLA UTILS COMMN UTIL S | Fixed Income / Cash | 0.11% | 2.4% | |
| 18 | LONG IS PWR AUTH N Y ELEC SYSLONG IS PWR AUTH N Y ELEC SYS | Fixed Income / Cash | 0.11% | 2.5% | |
| 19 | MASSACHUSETTS STMASSACHUSETTS ST | Fixed Income / Cash | 0.11% | 2.6% | |
| 20 | WASHOE CNTY NEV SCH DISTWASHOE CNTY NEV SCH DIST | Fixed Income / Cash | 0.11% | 2.7% | |
| Total (top 20) | 2.7% | ||||
Check Holdings Overlap
Sign in to see if this ETF's holdings overlap with stocks already in your portfolio. Knowing your total exposure helps avoid accidental over-concentration.
Sign In to Check OverlapInvestment CalculatorSee what investing in MUB might be worth
$
You invest
$10,000
Estimated gain
$883
Final value
$10,883
Projections assume returns compound at the chosen CAGR consistently for 10 years, actual returns will vary year-to-year. Past performance is not a guarantee of future results.
Key Concepts to UnderstandFive things that drive ETF performance more than anything else
Net Assets (AUM)
Total money the ETF manages. Larger AUM usually means tighter bid-ask spreads and lower closure risk. ETFs under $50M are sometimes liquidated by the issuer.
Learn more →NAV
Net Asset Value, the per-share value of everything the ETF owns minus what it owes, calculated end-of-day. The trading price can drift slightly above (premium) or below (discount) NAV during the day.
Learn more →Tracking Error
How closely the ETF's returns match its benchmark. Index ETFs aim for near-zero tracking error; high tracking error in an index fund usually signals fees, sampling, or poor management.
Learn more →Total Return
Capital gain + reinvested dividends. The headline price chart only shows the price part, total return is what you actually pocket, and is the only fair way to compare ETFs across asset classes.
Learn more →Similar ETFs
About This ETF
Provider
BlackRock (iShares)
Asset Class
Fixed Income
Top Sector
Fixed Income / Cash (97.8%)
The underlying index includes municipal bonds, the interest of which is exempt from Federal income taxes and not subject to alternative minimum tax. The fund will invest at least 80% of its assets in the component securities of the underlying index and it will invest at least 90% of its assets in fixed income securities of the types included in the underlying index that BFA believes will help the fund track the underlying index.
US ETF data is for educational purposes only. Past performance does not guarantee future returns. Exchange-traded funds carry market risk and may lose value. Read the prospectus and consult a registered investment advisor before investing. Equiscale does not provide investment advice.