Cross-sectional momentum on IDX. Survivorship-safe, walk-forward validated, with a Bayesian regime-filter overlay. Data as-of 2026-10-16, refreshed nightly.
Composite macro score -1 (range −6 to +7), filtered through a sticky Bayesian belief over four regimes. Positioned for capital preservation at next rebalance.
belief L/N/D/O = 0.00 / 0.02 / 0.89 / 0.09 · prior hard map: DEFENSIVE @ 0.70×
Screening recomputed nightly on latest prices (as-of 2026-10-16) — portfolio execution only at quarterly rebalance: last 2026-10-01 · next 2027-01-01 (first trading day of quarter). Names sized to the prevailing gross-exposure multiplier. Sector caps and single-name caps enforced at construction.
| # | Ticker | Composite | Momentum | Trend | Quality | LowVol | ADTV |
|---|---|---|---|---|---|---|---|
| 1 | MARK | 92.4 | 98.8 | 100.0 | 94.9 | 64.6 | Rp 16.2 Bn |
| 2 | BSSR | 88.7 | 98.2 | 100.0 | 77.2 | 70.1 | Rp 15.3 Bn |
| 3 | TAPG | 85.0 | 88.4 | 99.2 | 98.7 | 36.6 | Rp 29.0 Bn |
| 4 | DMAS | 84.3 | 97.6 | 91.7 | 98.1 | 26.2 | Rp 21.7 Bn |
| 5 | ULTJ | 83.7 | 99.4 | 83.3 | 77.8 | 61.6 | Rp 47.4 Bn |
| 6 | AADI | 81.6 | 91.5 | 96.7 | 73.4 | 51.8 | Rp 102.9 Bn |
| 7 | EMAS | 77.5 | 79.3 | 81.7 | 100.0 | 34.1 | Rp 75.6 Bn |
| 8 | PTBA | 69.8 | 90.2 | 73.3 | 43.7 | 62.8 | Rp 124.0 Bn |
| 9 | AALI | 68.5 | 92.7 | 84.2 | 21.5 | 67.1 | Rp 22.3 Bn |
| 10 | ERAA | 63.2 | 100.0 | 90.8 | 8.2 | 30.5 | Rp 52.5 Bn |
| 11 | LSIP | 60.2 | 82.3 | 0.0 | 90.5 | 61.0 | Rp 15.9 Bn |
| 12 | BBCA | 57.9 | 62.2 | 0.0 | 97.5 | 76.8 | Rp 1009.6 Bn |
Canonical factor weighting wins every in-sample window. Mean out-of-sample Sharpe: +0.81. Refit per window does not beat the fixed canonical — strong evidence the strategy is not curve-fit.
| Window | OOS Period | IS Winner | IS Sharpe | OOS Sharpe |
|---|---|---|---|---|
| WF1 | 2019-01-01 → 2019-12-31 | canonical | +0.78 | -0.31 |
| WF2 | 2020-01-01 → 2020-12-31 | canonical | +0.40 | +1.70 |
| WF3 | 2021-01-01 → 2021-12-31 | canonical | +0.76 | +1.30 |
| WF4 | 2022-01-01 → 2022-12-31 | canonical | +0.89 | +1.25 |
| WF5 | 2023-01-01 → 2023-12-31 | canonical | +0.94 | -0.58 |
| WF6 | 2024-01-01 → 2024-12-31 | canonical | +0.77 | +0.13 |
| WF7 | 2025-01-01 → 2026-06-02 | canonical | +0.69 | +2.20 |
Deep-dive thesis documents and operational playbook. All data-driven, regenerated from the live backtest.