{
  "experiment_name": "short_bearish_v1",
  "dataset_snapshot_id": "midlarge-liquid-long-v1_bucketfix_full_audit",
  "description": "Pure short-only bearish PEAD: short stocks with strong negative reaction (-5% to -18%), testing if bearish drift continues.",
  "base_config": "configs/backtest/return_max_long_v1.json",
  "overrides": {
    "signal": {
      "scoring_model": "pead",
      "score_threshold": 0.40,
      "max_candidates_per_day": 12,
      "a_tier_score_threshold": 0.65,
      "pead_reaction_threshold": 0.05,
      "pead_volume_threshold": 1.2
    },
    "risk": {
      "per_trade_risk_pct": 0.015,
      "per_trade_risk_pct_a_tier": 0.018,
      "max_daily_new_risk_pct": 0.15,
      "max_positions": 10,
      "max_positions_per_sector": 3,
      "max_position_value_pct": 0.20,
      "max_adv_fraction": 0.05,
      "macro_regime_enabled": false,
      "veto_unknown_direction": false,
      "veto_bearish_direction": false,
      "stop_atr_multiplier": 2.0
    },
    "execution": {
      "trailing_warmup_days": 3,
      "max_holding_days": 10,
      "early_failure_no_progress_days": 2,
      "early_failure_no_progress_r": 0.15,
      "early_failure_no_progress_fraction": 1.0
    },
    "event_type_profiles": {
      "earnings_release": {
        "enabled": true,
        "direction_filter": "any",
        "max_holding_days_override": 12
      },
      "guidance_update": {
        "enabled": true,
        "direction_filter": "any",
        "max_holding_days_override": 10
      },
      "other_material_event": {
        "enabled": true,
        "direction_filter": "any",
        "max_holding_days_override": 10
      }
    }
  },
  "strategy_engines": [
    {
      "engine_id": "reaction_close_short_bearish",
      "event_types": ["earnings_release", "guidance_update", "other_material_event"],
      "timing_class": "same_day",
      "direction": "short_only",
      "entry_timing_policy": "reaction_close",
      "max_holding_days": 10,
      "engine_risk_budget_pct": 0.50,
      "reaction_day_return_min": -0.18,
      "reaction_day_return_max": -0.05,
      "close_location_max": 0.40,
      "volume_ratio_min": 1.5,
      "score_threshold_override": 0.40,
      "per_trade_risk_pct_override": 0.015,
      "target_1_r_override": 2.0,
      "target_1_fraction_override": 0.25,
      "trailing_warmup_days_override": 3,
      "early_failure_no_progress_days_override": 2,
      "early_failure_no_progress_r_override": 0.15,
      "early_failure_no_progress_fraction_override": 1.0,
      "enabled": true
    },
    {
      "engine_id": "next_open_short_bearish",
      "event_types": ["earnings_release", "guidance_update", "other_material_event"],
      "timing_class": "any",
      "direction": "short_only",
      "entry_timing_policy": "next_open",
      "max_holding_days": 10,
      "engine_risk_budget_pct": 0.50,
      "reaction_day_return_min": -0.18,
      "reaction_day_return_max": -0.05,
      "close_location_max": 0.40,
      "volume_ratio_min": 1.5,
      "next_open_gap_cap_pct": 0.10,
      "score_threshold_override": 0.40,
      "per_trade_risk_pct_override": 0.015,
      "target_1_r_override": 2.0,
      "target_1_fraction_override": 0.25,
      "trailing_warmup_days_override": 3,
      "early_failure_no_progress_days_override": 2,
      "early_failure_no_progress_r_override": 0.15,
      "early_failure_no_progress_fraction_override": 1.0,
      "enabled": true
    }
  ],
  "strategy_engine_selection_mode": "global_score"
}