fix(preprocess): capture shared-prefix ticker lists

quantmind/preprocess/news.py

@@ -56,6 +56,9 @@
     r"(?<!\*)\*{1,2}([A-Z][A-Z0-9.-]{0,9})\*{1,2}(?!\*)",
     re.IGNORECASE,
 )
+_EXCHANGE_TICKER_LIST_MEMBER_RE = re.compile(
+    r"\s*,\s*([A-Z][A-Z0-9.-]{0,9})\b"
+)
 _EMAIL_PROTECTION_LINK_RE = re.compile(
     r"\[\[email protected]\]\(/cdn-cgi/l/email-protection#[^)]+\)"
 )
@@ -410,21 +413,42 @@ def extract_exchange_ticker_hints(text: str) -> tuple[NewsTickerHint, ...]:
     scan_text = _MARKDOWN_EMPHASIS_RE.sub(r"\1", scan_text)
     hints: list[NewsTickerHint] = []
     seen: set[tuple[str, str | None]] = set()
-    for match in _EXCHANGE_TICKER_RE.finditer(scan_text):
-        raw_exchange = " ".join(match.group(1).upper().split())
-        exchange = _EXCHANGE_NAMES.get(raw_exchange, raw_exchange)
-        symbol = match.group(2).upper()
+
+    def append_hint(
+        *,
+        symbol: str,
+        exchange: str,
+        raw: str,
+    ) -> None:
         key = (symbol, exchange)
         if key in seen:
-            continue
+            return
         seen.add(key)
         hints.append(
             NewsTickerHint(
                 symbol=symbol,
                 exchange=exchange,
-                raw=match.group(0).strip(),
+                raw=raw,
             )
         )
+
+    for match in _EXCHANGE_TICKER_RE.finditer(scan_text):
+        raw_exchange = " ".join(match.group(1).upper().split())
+        exchange = _EXCHANGE_NAMES.get(raw_exchange, raw_exchange)
+        symbol = match.group(2).upper()
+        append_hint(
+            symbol=symbol,
+            exchange=exchange,
+            raw=match.group(0).strip(),
+        )
+
+        tail = re.split(r"[;)]", scan_text[match.end() :], maxsplit=1)[0]
+        for list_match in _EXCHANGE_TICKER_LIST_MEMBER_RE.finditer(tail):
+            append_hint(
+                symbol=list_match.group(1).upper(),
+                exchange=exchange,
+                raw=f"{raw_exchange}: {list_match.group(1).upper()}",
+            )
     return tuple(hints)
 
 

tests/preprocess/test_news.py

@@ -117,6 +117,43 @@ def test_exchange_ticker_hints_ignore_markdown_decoration(self):
                     expected,
                 )
 
+    def test_exchange_ticker_hints_capture_shared_prefix_lists(self):
+        cases = (
+            (
+                "(OTCID: QVCAQ, QVCGQ, QVCPQ)",
+                [],
+            ),
+            (
+                "(NYSE: EVEX, EVEXW; B3: EVEB31)",
+                [("EVEX", "NYSE"), ("EVEXW", "NYSE")],
+            ),
+            (
+                "(NASDAQ: ABC, a leading provider announced results)",
+                [("ABC", "NASDAQ")],
+            ),
+            (
+                "(NYSE: TME and HKEX: 1698)",
+                [("TME", "NYSE")],
+            ),
+            (
+                "(NASDAQ: VMAR; TSXV: VMAR)",
+                [("VMAR", "NASDAQ")],
+            ),
+            (
+                "(NYSE: ASR; BMV: ASUR)",
+                [("ASR", "NYSE")],
+            ),
+        )
+
+        for text, expected in cases:
+            with self.subTest(text=text):
+                hints = extract_exchange_ticker_hints(text)
+
+                self.assertEqual(
+                    [(hint.symbol, hint.exchange) for hint in hints],
+                    expected,
+                )
+
     def test_build_sec_news_identity(self):
         self.assertEqual(
             build_sec_news_identity(