Map Yahoo Finance exchange codes to readable names

NYQ→NYSE, NMS/NGM/NCM→NASDAQ, ASE→AMEX, etc.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/app.py b/app.py
index f4c0ce8..cc1f077 100644
--- a/app.py
+++ b/app.py
@@ -136,7 +136,14 @@ with st.sidebar:
                     f"<span style='font-size:1.3rem;font-weight:700'>${price:,.2f}</span>",
                     unsafe_allow_html=True,
                 )
-        st.caption(f"Exchange: {info.get('exchange', '—')}")
+        _EXCHANGE_NAMES = {
+            "NYQ": "NYSE", "NMS": "NASDAQ", "NGM": "NASDAQ",
+            "NCM": "NASDAQ", "ASE": "AMEX", "PCX": "NYSE Arca",
+            "BTS": "BATS", "TSX": "TSX", "LSE": "LSE",
+        }
+        raw_exchange = info.get("exchange", "")
+        exchange = _EXCHANGE_NAMES.get(raw_exchange, raw_exchange) or "—"
+        st.caption(f"Exchange: {exchange}")
         st.caption(f"Currency: {info.get('currency', 'USD')}")
         st.caption(f"Sector: {info.get('sector', '—')}")
         employees = info.get("fullTimeEmployees")