History: short company names

app.py

@@ -130,6 +130,17 @@ async def orders():
 _names: dict = {}
 
 
+def _short_name(n: str | None) -> str | None:
+    """Alpaca's listing name without the share-class tail ("Micron Technology, Inc. Common Stock" → "Micron Technology, Inc.")."""
+    if not n:
+        return n
+    for tail in (" Common Stock", " Class A", " Class B", " Class C", " Ordinary Shares", " American Depositary", " Common Shares"):
+        i = n.find(tail)
+        if i > 0:
+            n = n[:i]
+    return n.strip()
+
+
 @app.get("/api/history")
 async def get_history():
     def load():
@@ -143,7 +154,7 @@ async def get_history():
         missing = sorted(s for s in syms if s not in _names and not rk.get(s))
         if missing:                                  # company names from Alpaca, once per symbol
             try:
-                _names.update({s: v.get("name") for s, v in a.assets(missing).items()})
+                _names.update({s: _short_name(v.get("name")) for s, v in a.assets(missing).items()})
             except BrokerError:
                 pass
         return history.build(orders, pos, flows, {s: rk.get(s) or _names.get(s) for s in syms})

tests/test_qt3_space.py

@@ -328,3 +328,10 @@ def test_history_replays_rebalances_from_orders():
     assert op["A"]["return"] == pytest.approx(120 / 105 - 1) and op["B"]["return"] == pytest.approx(93 / 100 - 1)
     s = h["summary"]
     assert s["rebalances"] == 2 and s["swaps_per_rebalance"] == 1 and s["closed"] == 1 and s["win_rate"] == 1
+
+
+def test_short_company_names():
+    import app as space
+    assert space._short_name("Micron Technology, Inc. Common Stock") == "Micron Technology, Inc."
+    assert space._short_name("Alphabet Inc. Class A Common Stock") == "Alphabet Inc."
+    assert space._short_name("HF Sinclair Corporation") == "HF Sinclair Corporation" and space._short_name(None) is None