fix(quote): report listed-but-unpriced stocks as NOMARKETDATA

MSN returns suspended names (21 of 896 on 2026-10-02, e.g. WIKA, SUPR)
with symbol, name and market cap but no price. These were reported as
SYMBOLNOTFOUND, which tells an agent the ticker does not exist. Add a
NoMarketData error for this case; unknown tickers stay SYMBOLNOTFOUND.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ld3fDSDiBzAaQvgZJX5NKM

src/api/msn/map.rs

@@ -15,9 +15,16 @@ use std::collections::HashMap;
 
 pub(super) fn parse_quote(symbol: &str, quotes: &[MsnQuote]) -> Result<Quote, IdxError> {
     let quote = quotes.first().ok_or(IdxError::ProviderUnavailable)?;
-    let raw_price = quote
-        .price
-        .ok_or_else(|| IdxError::SymbolNotFound(symbol.to_string()))?;
+    let Some(raw_price) = quote.price else {
+        // MSN still lists suspended/untraded names (symbol, name, market cap)
+        // but sends no price. That is a real instrument with no market data.
+        if quote.symbol.is_some() {
+            return Err(IdxError::NoMarketData(format!(
+                "{symbol} is listed but has no price from MSN (it may be suspended)"
+            )));
+        }
+        return Err(IdxError::SymbolNotFound(symbol.to_string()));
+    };
     let prev_close = quote.price_previous_close.map(round_price);
     let price = round_price(raw_price);
     let change = prev_close
@@ -778,9 +785,9 @@ fn collect_earnings(
 #[cfg(test)]
 mod tests {
     use super::{
-        KeyRatios, RawChartResponse, RawFinancialStatement, RawNewsFeed, RawScreenerResponse,
-        RawSentiment, parse_financial_statements, parse_fundamentals, parse_history, parse_news,
-        parse_screener_results, parse_sentiment,
+        KeyRatios, MsnQuote, RawChartResponse, RawFinancialStatement, RawNewsFeed,
+        RawScreenerResponse, RawSentiment, parse_financial_statements, parse_fundamentals,
+        parse_history, parse_news, parse_quote, parse_screener_results, parse_sentiment,
     };
     use crate::error::IdxError;
 
@@ -935,6 +942,20 @@ mod tests {
         );
     }
 
+    #[test]
+    fn listed_quote_without_price_is_no_market_data() {
+        let raw: Vec<MsnQuote> = serde_json::from_str(
+            r#"[{"symbol":"WIKA","shortName":"Wijaya Karya","marketCap":8080746000000.0}]"#,
+        )
+        .expect("quote should deserialize");
+        let err = parse_quote("WIKA.JK", &raw).unwrap_err();
+        assert!(matches!(err, IdxError::NoMarketData(_)), "{err:?}");
+
+        let raw: Vec<MsnQuote> = serde_json::from_str("[{}]").expect("quote should deserialize");
+        let err = parse_quote("ZZZZ.JK", &raw).unwrap_err();
+        assert!(matches!(err, IdxError::SymbolNotFound(_)), "{err:?}");
+    }
+
     #[test]
     fn empty_sentiment_response_is_empty_data_not_an_error() {
         let sentiment = parse_sentiment("BBCA", &[]).expect("empty sentiment is valid");

src/error.rs

@@ -32,6 +32,8 @@ pub enum IdxError {
     PdfParseError(String),
     #[error("invalid input: {0}")]
     InvalidInput(String),
+    #[error("no market data: {0}")]
+    NoMarketData(String),
 }
 
 #[derive(Debug, Clone, Copy, Serialize, PartialEq, Eq)]
@@ -50,6 +52,7 @@ pub enum ErrorCode {
     DatabaseError,
     PdfParseError,
     InvalidInput,
+    NoMarketData,
 }
 
 impl IdxError {
@@ -69,6 +72,7 @@ impl IdxError {
             Self::DatabaseError(_) => ErrorCode::DatabaseError,
             Self::PdfParseError(_) => ErrorCode::PdfParseError,
             Self::InvalidInput(_) => ErrorCode::InvalidInput,
+            Self::NoMarketData(_) => ErrorCode::NoMarketData,
         }
     }