按日期区分生命周期缺价并保留上市前现金区间

crates/fidc-core/src/instrument.rs

@@ -70,8 +70,17 @@ impl Instrument {
 
     pub fn is_active_on(&self, date: NaiveDate) -> bool {
         self.listed_at.is_none_or(|listed_at| listed_at <= date)
-            && !self.is_delisted_before(date)
-            && !(self.status.eq_ignore_ascii_case("inactive") && self.delisted_at.is_none())
+            && !self.is_delisted_on_or_before(date)
+    }
+
+    pub fn dated_market_absence_reason(&self, date: NaiveDate) -> Option<&'static str> {
+        if self.listed_at.is_some_and(|listed| date < listed) {
+            Some("not_yet_listed")
+        } else if self.is_delisted_on_or_before(date) {
+            Some("delisted")
+        } else {
+            None
+        }
     }
 }
 
@@ -107,6 +116,25 @@ mod tests {
         }
     }
 
+    #[test]
+    fn lifecycle_is_dated_and_latest_undated_terminal_status_is_not_historical_evidence() {
+        let mut item = instrument("BJS", 100);
+        let listing = chrono::NaiveDate::from_ymd_opt(2026, 8, 5).unwrap();
+        let removal = chrono::NaiveDate::from_ymd_opt(2026, 9, 10).unwrap();
+        item.listed_at = Some(listing);
+        item.delisted_at = Some(removal);
+        assert_eq!(item.dated_market_absence_reason(listing.pred_opt().unwrap()), Some("not_yet_listed"));
+        assert!(item.is_active_on(listing));
+        assert!(!item.is_active_on(removal));
+        assert_eq!(item.dated_market_absence_reason(removal), Some("delisted"));
+        item.delisted_at = None;
+        for status in ["delisting", "delisted", "inactive", "terminated"] {
+            item.status = status.into();
+            assert!(item.is_active_on(listing));
+            assert_eq!(item.dated_market_absence_reason(listing), None);
+        }
+    }
+
     #[test]
     fn order_quantity_rules_are_case_insensitive_without_allocating_normalized_boards() {
         let kcb = instrument(" kSh ", 100);