# Portfolio sensitivity

Fixed public research snapshot, market date 2026-10-05. Percent allocations; uncertainty radii held fixed for sensitivity comparisons.

| γ / portfolio | SPY | IEF | VTIP | GLDM | PDBC | FBTC | SPAXX |
|---|---:|---:|---:|---:|---:|---:|---:|
| 1 / central | 0.0 | 0.0 | 0.0 | 19.2 | 0.0 | 80.8 | 0.0 |
| 1 / robust | 0.0 | 17.1 | 0.0 | 0.0 | 23.7 | 59.2 | 0.0 |
| 2 / central | 0.0 | 11.7 | 0.0 | 28.7 | 17.7 | 41.9 | 0.0 |
| 2 / robust | 0.0 | 50.0 | 0.0 | 0.0 | 20.0 | 30.0 | 0.0 |
| 3 / central | 0.0 | 35.4 | 0.0 | 19.3 | 17.2 | 28.2 | 0.0 |
| 3 / robust | 0.0 | 52.9 | 0.0 | 0.0 | 17.2 | 20.2 | 9.7 |
| 4 / central | 0.0 | 47.2 | 0.0 | 14.5 | 17.0 | 21.3 | 0.0 |
| 4 / robust | 0.0 | 39.7 | 0.0 | 0.0 | 12.9 | 15.1 | 32.3 |
| 6 / central | 0.0 | 51.3 | 5.1 | 9.7 | 15.2 | 14.4 | 4.3 |
| 6 / robust | 0.0 | 26.4 | 0.0 | 0.0 | 8.6 | 10.1 | 54.9 |
| 10 / central | 0.0 | 30.8 | 3.0 | 5.8 | 9.1 | 8.6 | 42.6 |
| 10 / robust | 0.0 | 15.9 | 0.0 | 0.0 | 5.2 | 6.1 | 72.9 |

Alternate-seed maximum P10/median/P90 difference: 0.5 percentage points. Split-half maximum: 2.6 pp. These are numerical sampling diagnostics, not confidence intervals.