diff --git a/crates/fidc-core/src/platform_expr_strategy.rs b/crates/fidc-core/src/platform_expr_strategy.rs
index 2b389c2..c03da60 100644
--- a/crates/fidc-core/src/platform_expr_strategy.rs
+++ b/crates/fidc-core/src/platform_expr_strategy.rs
@@ -649,6 +649,7 @@ pub struct PlatformExprStrategyConfig {
     pub matching_type: MatchingType,
     pub quote_quantity_limit: bool,
     pub current_day_precomputed_factors: bool,
+    pub completed_session_factor_fields: BTreeSet<String>,
     pub candidate_symbols_by_date: BTreeMap<NaiveDate, BTreeSet<String>>,
     pub intraday_execution_time: Option<NaiveTime>,
     pub explicit_action_times: Vec<NaiveTime>,
@@ -727,6 +728,7 @@ impl PlatformExprStrategyConfig {
             matching_type: MatchingType::CurrentBarClose,
             quote_quantity_limit: true,
             current_day_precomputed_factors: false,
+            completed_session_factor_fields: BTreeSet::new(),
             candidate_symbols_by_date: BTreeMap::new(),
             intraday_execution_time: None,
             explicit_action_times: Vec::new(),
@@ -1396,6 +1398,26 @@ fn platform_safe_div_default(lhs: f64, rhs: f64) -> f64 {
     platform_safe_div(lhs, rhs, 0.0)
 }
 
+fn completed_session_factor_date(
+    ctx: &StrategyContext<'_>,
+    date: NaiveDate,
+    factor_date: NaiveDate,
+    execution_time: Option<NaiveTime>,
+) -> Option<NaiveDate> {
+    let factor_date = factor_date.min(ctx.decision_date);
+    if factor_date < date || factor_date < ctx.decision_date {
+        return Some(factor_date);
+    }
+    let time = execution_time.or_else(|| ctx.active_datetime.map(|value| value.time()));
+    // Native CN stock daily indicator rows become usable only after the
+    // session closes. Absence of an intraday clock denotes a daily close bar.
+    if time.is_none_or(|time| time >= NaiveTime::from_hms_opt(15, 0, 0).unwrap()) {
+        Some(factor_date)
+    } else {
+        ctx.data.previous_trading_date(factor_date, 1)
+    }
+}
+
 impl PlatformExprStrategy {
     fn market_cap_storage_to_strategy_unit(value: f64) -> f64 {
         value
@@ -4705,6 +4727,23 @@ impl PlatformExprStrategy {
         } else {
             BTreeMap::new()
         };
+        if !self.config.completed_session_factor_fields.is_empty() {
+            let visible_date = completed_session_factor_date(
+                ctx, date, factor_date,
+                execution_time.or(self.config.intraday_execution_time),
+            );
+            let visible_factor = visible_date
+                .and_then(|visible_date| ctx.data.factor_by_symbol_id(visible_date, symbol_id));
+            for field in &self.config.completed_session_factor_fields {
+                if self.stock_extra_factor_map_required || self.stock_extra_factor_identifiers.contains(field) {
+                    let value = visible_factor
+                        .and_then(|row| row.extra_factors.get(field.as_str()))
+                        .copied()
+                        .unwrap_or(f64::NAN);
+                    extra_factors.insert(field.clone(), value);
+                }
+            }
+        }
         if self.stock_extra_factors_required
             && (self.stock_extra_factor_map_required
                 || self
@@ -13913,6 +13952,35 @@ mod tests {
         NaiveDate::from_ymd_opt(year, month, day).expect("valid date")
     }
 
+    #[test]
+    fn completed_session_factor_dates_exclude_intraday_and_preserve_next_open() {
+        let prev = d(2025, 1, 2);
+        let curr = d(2025, 1, 3);
+        let data = single_symbol_platform_data(&[prev, curr], "000001.SZ");
+        let portfolio = PortfolioState::new(10_000.0);
+        let subscriptions = BTreeSet::new();
+        let mut ctx = StrategyContext {
+            execution_date: curr, decision_date: curr, decision_index: 1,
+            data: &data, portfolio: &portfolio, futures_account: None,
+            open_orders: &[], dynamic_universe: None, subscriptions: &subscriptions,
+            process_events: &[], active_process_event: None, active_datetime: None,
+            order_events: &[], fills: &[],
+        };
+        for hour in [9, 10, 14] {
+            assert_eq!(super::completed_session_factor_date(&ctx, curr, curr,
+                NaiveTime::from_hms_opt(hour, 30, 0)), Some(prev));
+        }
+        assert_eq!(super::completed_session_factor_date(&ctx, curr, curr,
+            NaiveTime::from_hms_opt(15, 0, 0)), Some(curr));
+        assert_eq!(super::completed_session_factor_date(&ctx, curr, curr, None), Some(curr));
+        ctx.active_datetime = Some(curr.and_hms_opt(10, 0, 0).unwrap());
+        assert_eq!(super::completed_session_factor_date(&ctx, curr, curr, None), Some(prev));
+        ctx.decision_date = prev;
+        assert_eq!(super::completed_session_factor_date(&ctx, curr, curr, None), Some(prev));
+        ctx.execution_date = prev;
+        assert_eq!(super::completed_session_factor_date(&ctx, prev, prev, None), None);
+    }
+
     #[test]
     fn target_scale_replenishment_preserves_strategy_cash_allocation() {
         let scale = 30.0 / 31.0;
diff --git a/crates/fidc-core/src/platform_strategy_spec.rs b/crates/fidc-core/src/platform_strategy_spec.rs
index c39dfc0..9e2781d 100644
--- a/crates/fidc-core/src/platform_strategy_spec.rs
+++ b/crates/fidc-core/src/platform_strategy_spec.rs
@@ -1785,6 +1785,23 @@ pub fn platform_expr_config_from_spec(
     let Some(spec) = strategy_spec else {
         return Ok(cfg);
     };
+    if let Some(conditions) = spec.stock_pool_factor_contract.as_ref()
+        .and_then(|contract| contract.get("conditions"))
+        .and_then(Value::as_array)
+    {
+        for condition in conditions {
+            let Some(binding) = condition.pointer("/semantic/backtestBinding") else { continue };
+            let field = binding.get("field").and_then(Value::as_str).unwrap_or("");
+            let dataset = binding.get("sourceDataset").and_then(Value::as_str).unwrap_or("");
+            if !dataset.starts_with("indicators_") || field.is_empty()
+                || !field.bytes().all(|byte| byte.is_ascii_alphanumeric() || byte == b'_')
+                || field.as_bytes()[0].is_ascii_digit()
+            {
+                return Err("invalid native factor backtest binding".to_string());
+            }
+            cfg.completed_session_factor_fields.insert(field.to_string());
+        }
+    }
     let mut benchmark_short_explicit = false;
     let mut benchmark_long_explicit = false;
     let mut stock_short_explicit = false;
@@ -3110,6 +3127,20 @@ fn symbol_is_kcb(symbol: &str) -> bool {
 mod tests {
     use super::*;
 
+    #[test]
+    fn native_factor_bindings_declare_completed_session_fields() {
+        let spec = serde_json::json!({"stockPoolFactorContract": {"conditions": [
+            {"factorRef": "up_days_stock", "semantic": {"backtestBinding": {
+                "field": "ths_up_days_stock", "sourceDataset": "indicators_up_days_stock"
+            }}}
+        ]}});
+        let cfg = platform_expr_config_from_value("test", "000852.SH", &spec).unwrap();
+        assert_eq!(cfg.completed_session_factor_fields,
+            BTreeSet::from(["ths_up_days_stock".to_string()]));
+        let empty = platform_expr_config_from_value("test", "000852.SH", &serde_json::json!({})).unwrap();
+        assert!(empty.completed_session_factor_fields.is_empty());
+    }
+
     #[test]
     fn normalize_board_classifies_kcb_by_688_689_sh_suffix_only() {
         assert_eq!(normalize_board("688001.SH", None), "KSH");