Vanguard Municipal Money Market Fund Investor Shares
                        VMSXX
                    
                    
                            NASDAQ
                    
                | Weiss Ratings | VMSXX-NASDAQ | Click to Compare  | 
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| Rating | ||||
| Reward Index | Fair | |||
| Reward Grade | C | |||
| Risk Index | Fair | |||
| Risk Grade | C+ | |||
| Company Info | VMSXX-NASDAQ | Click to Compare  | 
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| Provider | Vanguard | |||
| Manager/Tenure (Years) | Justin A. Schwartz (9), John Grimes (1) | |||
| Website | http://www.vanguard.com | |||
| Fund Information | VMSXX-NASDAQ | Click to Compare  | 
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| Fund Name | Vanguard Municipal Money Market Fund Investor Shares | |||
| Category | Money Market-Tax-Free | |||
| Sub-Category | US Money Market | |||
| Prospectus Objective | Money Mkt - Federal Tax Exempt | |||
| Inception Date | Jun 10, 1980 | |||
| Open/Closed To New Investors | Open | |||
| Minimum Initial Investment | 3,000.00 | |||
| Minimum Subsequent Investment | 1.00 | |||
| Front End Fee | -- | |||
| Back End Fee | -- | |||
| Dividends and Shares | VMSXX-NASDAQ | Click to Compare  | 
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| Dividend Yield | 2.72% | |||
| Dividend | VMSXX-NASDAQ | Click to Compare  | 
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| Dividend Yield (Forward) | -- | |||
| Asset Allocation | VMSXX-NASDAQ | Click to Compare  | 
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| Cash | 5.76% | |||
| Stock | 0.00% | |||
| U.S. Stock | 0.00% | |||
| Non-U.S. Stock | 0.00% | |||
| Bond | 94.24% | |||
| U.S. Bond | 94.14% | |||
| Non-U.S. Bond | 0.10% | |||
| Preferred | 0.00% | |||
| Convertible | 0.00% | |||
| Other Net | 0.00% | |||
| Price History | VMSXX-NASDAQ | Click to Compare  | 
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| 7-Day Total Return | 0.03% | |||
| 30-Day Total Return | 0.20% | |||
| 60-Day Total Return | 0.43% | |||
| 90-Day Total Return | 0.62% | |||
| Year to Date Total Return | 2.18% | |||
| 1-Year Total Return | 2.66% | |||
| 2-Year Total Return | 6.15% | |||
| 3-Year Total Return | 9.40% | |||
| 5-Year Total Return | 10.15% | |||
| Price | VMSXX-NASDAQ | Click to Compare  | 
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| Closing Price | -- | |||
| 1-Month Low Price | -- | |||
| 1-Month High Price | -- | |||
| 52-Week Low Price | -- | |||
| 52-Week Low Price (Date) | -- | |||
| 52-Week High Price | -- | |||
| 52-Week High Price (Date) | -- | |||
| NAV | VMSXX-NASDAQ | Click to Compare  | 
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| Nav | $1.00 | |||
| 1-Month Low NAV | $1.00 | |||
| 1-Month High NAV | $1.00 | |||
| 52-Week Low NAV | $1.00 | |||
| 52-Week Low NAV (Date) | Nov 01, 2024 | |||
| 52-Week High NAV | $1.00 | |||
| 52-Week High Price (Date) | Oct 31, 2025 | |||
| Beta / Standard Deviation | VMSXX-NASDAQ | Click to Compare  | 
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| Beta | -- | |||
| Standard Deviation | 0.14 | |||
| Balance Sheet | VMSXX-NASDAQ | Click to Compare  | 
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| Total Assets | 17.34B | |||
| Operating Ratios | VMSXX-NASDAQ | Click to Compare  | 
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| Expense Ratio | 0.11% | |||
| Turnover Ratio | -- | |||
| Performance | VMSXX-NASDAQ | Click to Compare  | 
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| Last Bull Market Total Return | 1.91% | |||
| Last Bear Market Total Return | 0.13% | |||