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American Century Intermediate Term Tax-Free Bond Fund Investor Class TWTIX
Historical return decomposition and an investable replication portfolio, using data through 2026-10-09.
Fund and replication metrics
| Measure | TWTIX | Replication |
|---|---|---|
| Annualized growth | 0.1% | 0.4% |
| Annualized volatility | 4.3% | 4.3% |
| Sharpe ratio | 0.06 | 0.13 |
| Maximum drawdown | 11.3% | 10.3% |
| Replication fit (R²) | 0.99 · Tracking error 0.5% | |
Replication portfolio
The published portfolio below is the investable basket used to model TWTIX’s historical return behavior.
| Ticker | Building block | Weight |
|---|---|---|
| MUB | FI · Municipal | 83.9% |
| STIP | FI · Short TIPS | 10.6% |
| VCSH | FI · Short Corp | 5.5% |