# Vanguard Mortgage-Backed Secs Idx Instl (VMBIX)

> Source: Nexqual · https://nexqual.com/VMBIX · data as of 2026-10-24 00:08 UTC · cite as "Nexqual, Vanguard Mortgage-Backed Secs Idx Instl (VMBIX), nexqual.com/VMBIX" · informational, not investment advice.

**Price:** USD 24.47 (-0.16% on the day) · last close of Oct 23, 2026; US market closed, not a live price. Prev close 24.51 · day 24.47–24.47 · 52w 23.91–25.91 · market cap null · NAS

## Key facts
- Total return with dividends: 1Y -0.6% vs S&P 500 +13.4%; 5Y +1.1% vs S&P 500 +76.9%.

## Total return (dividends reinvested)
|  | 1Y (from 2025-10-24) | 5Y (from 2021-10-25) |
|---|---|---|
| Total return | -0.6% | +1.1% |
| S&P 500 (SPY) | +13.4% | +76.9% |
| Per year | -0.6% | +0.2% |
| Volatility (annualized) | 4.4% | 6.3% |
| Max drawdown | -5.1% (Feb 2026→Oct 2026) | -16.6% (Nov 2021→Oct 2022) |

## Peers
VMBSX (Vanguard Mortgage-Backed Securi) USD 18.06 +0.00% · VIIGX (Vanguard Intermediate-Term Trea) USD 24.05 +0.00% · VSBIX (Vanguard Short-Term Treasury In) USD 24.21 +0.00% · VLGIX (Vanguard Long-Term Treasury Ind) USD 22.25 +0.00% · VLCIX (Vanguard LT Corporate Bond Inde) USD 23.43 -0.00%

## More
Full page: https://nexqual.com/VMBIX · Free keyless MCP server with the same data and citations: https://mcp.nexqual.com/mcp · Guide for agents: https://nexqual.com/agents · https://nexqual.com/llms.txt